./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loop-lit/gr2006.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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:11:45,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:11:45,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:11:45,338 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:11:45,339 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:11:45,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:11:45,344 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:11:45,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:11:45,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:11:45,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:11:45,356 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:11:45,358 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:11:45,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:11:45,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:11:45,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:11:45,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:11:45,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:11:45,369 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:11:45,372 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:11:45,375 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:11:45,378 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:11:45,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:11:45,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:11:45,383 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:11:45,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:11:45,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:11:45,389 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:11:45,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:11:45,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:11:45,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:11:45,394 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:11:45,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:11:45,397 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:11:45,398 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:11:45,400 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:11:45,400 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:11:45,401 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:11:45,402 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:11:45,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:11:45,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:11:45,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:11:45,406 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 03:11:45,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:11:45,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:11:45,437 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:11:45,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:11:45,438 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:11:45,438 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:11:45,439 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:11:45,439 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:11:45,439 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:11:45,439 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:11:45,440 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:11:45,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:11:45,440 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:11:45,441 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:11:45,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:11:45,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:11:45,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:11:45,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:11:45,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:11:45,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:11:45,442 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:11:45,443 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:11:45,443 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:11:45,443 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:11:45,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:11:45,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:11:45,444 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:11:45,445 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:11:45,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:11:45,445 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:11:45,445 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:11:45,446 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:11:45,447 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:11:45,447 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2020-11-28 03:11:45,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:11:45,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:11:45,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:11:45,791 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:11:45,797 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:11:45,799 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gr2006.i [2020-11-28 03:11:45,890 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/data/cca4adbf5/0a567f8616af40daa3c00e0764d00509/FLAGe1d64ce78 [2020-11-28 03:11:46,489 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:11:46,489 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/sv-benchmarks/c/loop-lit/gr2006.i [2020-11-28 03:11:46,497 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/data/cca4adbf5/0a567f8616af40daa3c00e0764d00509/FLAGe1d64ce78 [2020-11-28 03:11:46,810 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/data/cca4adbf5/0a567f8616af40daa3c00e0764d00509 [2020-11-28 03:11:46,813 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:11:46,815 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:11:46,817 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:46,817 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:11:46,822 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:11:46,823 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:46" (1/1) ... [2020-11-28 03:11:46,825 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ccdcd74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:46, skipping insertion in model container [2020-11-28 03:11:46,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:46" (1/1) ... [2020-11-28 03:11:46,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:11:46,853 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:11:47,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:47,129 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:11:47,148 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:47,166 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:11:47,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47 WrapperNode [2020-11-28 03:11:47,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:47,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:47,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:11:47,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:11:47,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,189 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,213 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:47,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:11:47,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:11:47,216 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:11:47,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,254 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... [2020-11-28 03:11:47,256 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:11:47,257 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:11:47,257 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:11:47,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:11:47,262 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:47,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:11:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:11:47,360 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:11:47,360 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:11:47,668 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:11:47,669 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-28 03:11:47,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:47 BoogieIcfgContainer [2020-11-28 03:11:47,671 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:11:47,672 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:11:47,672 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:11:47,677 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:11:47,678 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:11:47,678 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:11:46" (1/3) ... [2020-11-28 03:11:47,693 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@175c7fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:11:47, skipping insertion in model container [2020-11-28 03:11:47,693 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:11:47,693 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:47" (2/3) ... [2020-11-28 03:11:47,694 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@175c7fd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:11:47, skipping insertion in model container [2020-11-28 03:11:47,694 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:11:47,694 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:47" (3/3) ... [2020-11-28 03:11:47,696 INFO L373 chiAutomizerObserver]: Analyzing ICFG gr2006.i [2020-11-28 03:11:47,795 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:11:47,795 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:11:47,795 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:11:47,795 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:11:47,796 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:11:47,796 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:11:47,796 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:11:47,796 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:11:47,811 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-28 03:11:47,837 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:47,837 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:47,837 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:47,845 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:47,845 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:11:47,846 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:11:47,846 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-28 03:11:47,850 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:47,851 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:47,851 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:47,851 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-28 03:11:47,851 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:11:47,861 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); 10#L-1true havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 3#L28-2true [2020-11-28 03:11:47,861 INFO L796 eck$LassoCheckResult]: Loop: 3#L28-2true assume !false; 8#L29true assume !(main_~x~0 < 50);main_#t~post4 := main_~y~0;main_~y~0 := main_#t~post4 - 1;havoc main_#t~post4; 5#L29-2true assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 3#L28-2true [2020-11-28 03:11:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:47,885 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-28 03:11:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:47,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918019281] [2020-11-28 03:11:47,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:48,081 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:48,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:48,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:48,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2020-11-28 03:11:48,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:48,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168919582] [2020-11-28 03:11:48,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:48,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:48,146 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:48,153 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:48,156 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:48,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:48,159 INFO L82 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2020-11-28 03:11:48,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:48,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075182831] [2020-11-28 03:11:48,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:48,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075182831] [2020-11-28 03:11:48,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:48,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 03:11:48,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123467139] [2020-11-28 03:11:48,348 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:48,348 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:48,349 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:48,349 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:48,349 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:11:48,349 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:48,350 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:48,350 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:48,350 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2020-11-28 03:11:48,350 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:48,351 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:48,375 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,390 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,552 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:48,553 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:48,565 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:48,565 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 [2020-11-28 03:11:48,576 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:48,577 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:48,628 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:48,629 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:48,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:48,685 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 [2020-11-28 03:11:48,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:48,703 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=50} Honda state: {ULTIMATE.start_main_~x~0=50} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=1}] Lambdas: [3, 12, 1] Nus: [1, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:48,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:48,758 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:48,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:48,817 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 [2020-11-28 03:11:48,933 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:11:48,939 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:48,939 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:48,940 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:48,940 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:48,940 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:11:48,940 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:48,940 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:48,940 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:48,940 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2020-11-28 03:11:48,941 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:48,941 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:48,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,949 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,965 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:48,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:49,199 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:49,205 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:49,217 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 [2020-11-28 03:11:49,221 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:49,221 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:49,222 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:49,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:49,223 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:49,226 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:49,226 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:49,231 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:49,269 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 [2020-11-28 03:11:49,272 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:49,272 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:49,272 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:49,272 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:49,272 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:49,275 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:49,276 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:11:49,280 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:49,337 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 [2020-11-28 03:11:49,340 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:49,340 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:49,340 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:49,340 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:49,341 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:49,343 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:49,343 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:11:49,346 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:11:49,353 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:11:49,353 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:49,362 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:11:49,363 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:11:49,363 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:11:49,364 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 1*ULTIMATE.start_main_~y~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:49,401 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:11:49,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:49,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:11:49,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:49,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:49,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:49,550 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-28 03:11:49,552 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2020-11-28 03:11:49,639 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states.. Second operand 4 states. Result 45 states and 59 transitions. Complement of second has 8 states. [2020-11-28 03:11:49,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-28 03:11:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:11:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 27 transitions. [2020-11-28 03:11:49,649 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-28 03:11:49,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:49,652 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-28 03:11:49,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:49,653 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-28 03:11:49,653 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:49,654 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 59 transitions. [2020-11-28 03:11:49,666 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:49,672 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 10 states and 13 transitions. [2020-11-28 03:11:49,674 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-28 03:11:49,675 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-28 03:11:49,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-11-28 03:11:49,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:11:49,676 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-28 03:11:49,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-11-28 03:11:49,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-28 03:11:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:11:49,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-11-28 03:11:49,704 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-28 03:11:49,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:49,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-28 03:11:49,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-28 03:11:49,709 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2020-11-28 03:11:49,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:49,722 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-28 03:11:49,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 03:11:49,724 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-28 03:11:49,724 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:49,725 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 9 transitions. [2020-11-28 03:11:49,725 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-28 03:11:49,726 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-28 03:11:49,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-11-28 03:11:49,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:11:49,726 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-28 03:11:49,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-11-28 03:11:49,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-11-28 03:11:49,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:11:49,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-28 03:11:49,729 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-28 03:11:49,729 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-28 03:11:49,730 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:11:49,730 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-11-28 03:11:49,730 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:49,731 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:49,731 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:49,731 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-28 03:11:49,731 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:11:49,732 INFO L794 eck$LassoCheckResult]: Stem: 126#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); 122#L-1 havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 123#L28-2 assume !false; 128#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 127#L29-2 [2020-11-28 03:11:49,732 INFO L796 eck$LassoCheckResult]: Loop: 127#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 124#L28-2 assume !false; 125#L29 assume !(main_~x~0 < 50);main_#t~post4 := main_~y~0;main_~y~0 := main_#t~post4 - 1;havoc main_#t~post4; 127#L29-2 [2020-11-28 03:11:49,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:49,733 INFO L82 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2020-11-28 03:11:49,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:49,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651806181] [2020-11-28 03:11:49,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:49,756 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:49,771 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:49,776 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:49,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:49,777 INFO L82 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2020-11-28 03:11:49,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:49,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119249363] [2020-11-28 03:11:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:49,785 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:49,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:49,792 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2020-11-28 03:11:49,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:49,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416980623] [2020-11-28 03:11:49,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416980623] [2020-11-28 03:11:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840642727] [2020-11-28 03:11:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-28 03:11:49,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:50,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:50,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-11-28 03:11:50,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299792042] [2020-11-28 03:11:50,131 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:50,132 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:50,132 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:50,132 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:50,132 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:11:50,132 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,132 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:50,133 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:50,133 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2020-11-28 03:11:50,133 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:50,133 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:50,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,146 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,155 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,282 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:50,282 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,301 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:50,301 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:50,352 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:50,352 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,402 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:50,402 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~x~0=49} Honda state: {ULTIMATE.start_main_~x~0=49} Generalized eigenvectors: [{ULTIMATE.start_main_~x~0=0}, {ULTIMATE.start_main_~x~0=1}, {ULTIMATE.start_main_~x~0=0}] Lambdas: [7, 1, 6] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:50,437 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:50,438 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:11:50,443 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:50,443 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:50,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:50,472 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:11:50,475 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:50,476 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post4=0} Honda state: {ULTIMATE.start_main_#t~post4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:50,504 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:50,504 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:50,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:50,547 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 [2020-11-28 03:11:50,596 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:11:50,598 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:50,599 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:50,599 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:50,599 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:50,599 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:11:50,599 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,599 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:50,600 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:50,600 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2020-11-28 03:11:50,600 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:50,600 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:50,601 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,636 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:50,719 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:50,719 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:50,724 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 [2020-11-28 03:11:50,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:50,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:50,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:50,728 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:50,728 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:50,730 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:50,731 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,734 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:50,784 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 [2020-11-28 03:11:50,786 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:50,787 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:50,787 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:50,787 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:50,787 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:50,789 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:50,789 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,796 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:11:50,854 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 [2020-11-28 03:11:50,856 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:50,856 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:50,857 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:50,857 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:50,857 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:50,858 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:50,858 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:50,861 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:50,895 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 [2020-11-28 03:11:50,897 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:50,897 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:50,897 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:50,897 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:50,898 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:50,899 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:50,899 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:11:50,902 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:11:50,908 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:11:50,908 INFO L444 ModelExtractionUtils]: 0 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:50,911 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:11:50,911 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:11:50,912 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:11:50,912 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2020-11-28 03:11:50,939 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:11:50,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:51,042 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-28 03:11:51,043 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-28 03:11:51,066 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 13 states and 16 transitions. Complement of second has 5 states. [2020-11-28 03:11:51,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 03:11:51,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-28 03:11:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-11-28 03:11:51,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-28 03:11:51,070 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:51,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-28 03:11:51,070 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:51,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 6 letters. [2020-11-28 03:11:51,071 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:51,071 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2020-11-28 03:11:51,072 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:51,072 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 16 transitions. [2020-11-28 03:11:51,073 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-28 03:11:51,073 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-28 03:11:51,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 16 transitions. [2020-11-28 03:11:51,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:11:51,073 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-11-28 03:11:51,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 16 transitions. [2020-11-28 03:11:51,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-28 03:11:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-28 03:11:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-11-28 03:11:51,076 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-11-28 03:11:51,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:51,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:51,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-28 03:11:51,080 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 5 states. [2020-11-28 03:11:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:51,106 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-28 03:11:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:11:51,107 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-11-28 03:11:51,108 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:51,109 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 11 states and 12 transitions. [2020-11-28 03:11:51,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-28 03:11:51,109 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-28 03:11:51,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-11-28 03:11:51,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:11:51,109 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-28 03:11:51,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-11-28 03:11:51,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-11-28 03:11:51,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:11:51,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-28 03:11:51,112 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 03:11:51,112 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-28 03:11:51,112 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:11:51,112 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-11-28 03:11:51,113 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-28 03:11:51,113 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:51,113 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:51,113 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2020-11-28 03:11:51,114 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:11:51,114 INFO L794 eck$LassoCheckResult]: Stem: 235#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); 231#L-1 havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 232#L28-2 assume !false; 240#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 236#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 233#L28-2 assume !false; 234#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 237#L29-2 [2020-11-28 03:11:51,114 INFO L796 eck$LassoCheckResult]: Loop: 237#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 239#L28-2 assume !false; 238#L29 assume !(main_~x~0 < 50);main_#t~post4 := main_~y~0;main_~y~0 := main_#t~post4 - 1;havoc main_#t~post4; 237#L29-2 [2020-11-28 03:11:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2020-11-28 03:11:51,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:51,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712921716] [2020-11-28 03:11:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:51,161 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:51,174 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:51,195 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:51,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,196 INFO L82 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2020-11-28 03:11:51,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:51,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505724073] [2020-11-28 03:11:51,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:51,202 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:51,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:51,220 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:51,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1054739784, now seen corresponding path program 2 times [2020-11-28 03:11:51,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:51,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798586938] [2020-11-28 03:11:51,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:51,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798586938] [2020-11-28 03:11:51,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853146282] [2020-11-28 03:11:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:51,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:51,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:51,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:51,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:51,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-28 03:11:51,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622108524] [2020-11-28 03:11:51,458 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:51,458 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:51,458 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:51,459 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:51,459 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:11:51,459 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:51,459 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:51,459 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:51,459 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2020-11-28 03:11:51,459 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:51,459 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:51,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,471 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,475 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,553 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:51,554 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:51,562 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:51,562 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:51,612 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:51,613 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:11:51,664 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:11:51,667 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:51,667 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:51,667 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:51,667 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:51,668 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:11:51,668 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:51,668 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:51,668 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:51,668 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2020-11-28 03:11:51,668 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:51,668 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:51,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:51,754 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:51,754 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:51,758 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 [2020-11-28 03:11:51,760 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:51,761 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:51,761 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:51,761 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:51,761 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:51,763 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:51,763 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:51,767 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:11:51,773 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:11:51,773 INFO L444 ModelExtractionUtils]: 0 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:51,778 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:11:51,778 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:11:51,778 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:11:51,779 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:51,823 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:11:51,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:51,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:51,914 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-28 03:11:51,914 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-28 03:11:51,941 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 12 states and 13 transitions. Complement of second has 5 states. [2020-11-28 03:11:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 03:11:51,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-28 03:11:51,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-28 03:11:51,943 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-28 03:11:51,944 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:51,944 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:11:51,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:51,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:11:51,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:52,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:52,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:52,018 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-28 03:11:52,019 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-28 03:11:52,033 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 12 states and 13 transitions. Complement of second has 5 states. [2020-11-28 03:11:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 03:11:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-28 03:11:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-28 03:11:52,037 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-28 03:11:52,037 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:52,037 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:11:52,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:52,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:11:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:52,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:52,108 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 2 loop predicates [2020-11-28 03:11:52,108 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-28 03:11:52,139 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 15 states and 17 transitions. Complement of second has 4 states. [2020-11-28 03:11:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-28 03:11:52,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-28 03:11:52,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2020-11-28 03:11:52,140 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-28 03:11:52,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:52,141 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2020-11-28 03:11:52,141 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:52,142 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2020-11-28 03:11:52,142 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:52,142 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2020-11-28 03:11:52,143 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-28 03:11:52,144 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 15 transitions. [2020-11-28 03:11:52,144 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-28 03:11:52,144 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-28 03:11:52,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2020-11-28 03:11:52,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:11:52,145 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-28 03:11:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2020-11-28 03:11:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-11-28 03:11:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-28 03:11:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-11-28 03:11:52,151 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-11-28 03:11:52,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:52,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:52,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:52,153 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2020-11-28 03:11:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:52,191 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-28 03:11:52,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:11:52,206 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 22 transitions. [2020-11-28 03:11:52,207 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-28 03:11:52,208 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 17 states and 20 transitions. [2020-11-28 03:11:52,208 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2020-11-28 03:11:52,208 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-11-28 03:11:52,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 20 transitions. [2020-11-28 03:11:52,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:11:52,209 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-28 03:11:52,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 20 transitions. [2020-11-28 03:11:52,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-11-28 03:11:52,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-28 03:11:52,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-28 03:11:52,211 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-28 03:11:52,211 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-28 03:11:52,211 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:11:52,211 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 16 transitions. [2020-11-28 03:11:52,213 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-28 03:11:52,213 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:11:52,213 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:11:52,214 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 1, 1] [2020-11-28 03:11:52,214 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-28 03:11:52,214 INFO L794 eck$LassoCheckResult]: Stem: 469#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); 463#L-1 havoc main_#res;havoc main_#t~post3, main_#t~post4, main_#t~post5, main_~x~0, main_~y~0;havoc main_~x~0;havoc main_~y~0;main_~x~0 := 0;main_~y~0 := 0; 464#L28-2 assume !false; 476#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 470#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 465#L28-2 assume !false; 466#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 473#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 472#L28-2 [2020-11-28 03:11:52,214 INFO L796 eck$LassoCheckResult]: Loop: 472#L28-2 assume !false; 475#L29 assume main_~x~0 < 50;main_#t~post3 := main_~y~0;main_~y~0 := 1 + main_#t~post3;havoc main_#t~post3; 474#L29-2 assume !(main_~y~0 < 0);main_#t~post5 := main_~x~0;main_~x~0 := 1 + main_#t~post5;havoc main_#t~post5; 472#L28-2 [2020-11-28 03:11:52,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:52,215 INFO L82 PathProgramCache]: Analyzing trace with hash 296069283, now seen corresponding path program 2 times [2020-11-28 03:11:52,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:52,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447914651] [2020-11-28 03:11:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:52,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:52,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:52,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:52,264 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:52,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash 40818, now seen corresponding path program 1 times [2020-11-28 03:11:52,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:52,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062635322] [2020-11-28 03:11:52,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:52,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:52,295 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:52,297 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1662805104, now seen corresponding path program 3 times [2020-11-28 03:11:52,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:52,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072939359] [2020-11-28 03:11:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:52,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:52,312 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:52,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:52,336 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:52,341 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:52,377 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:52,378 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:52,378 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:52,378 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:52,378 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:11:52,378 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:52,378 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:52,378 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:52,379 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration4_Loop [2020-11-28 03:11:52,379 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:52,379 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:52,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,491 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:52,492 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:52,499 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:52,500 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:52,504 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:52,505 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:52,554 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:52,554 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:52,608 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:52,608 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:52,652 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:11:52,652 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~y~0=-1} Honda state: {ULTIMATE.start_main_~y~0=-1} Generalized eigenvectors: [{ULTIMATE.start_main_~y~0=0}, {ULTIMATE.start_main_~y~0=0}, {ULTIMATE.start_main_~y~0=1}] Lambdas: [6, 0, 1] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:52,701 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:11:52,702 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:52,755 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:11:52,756 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:52,808 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:11:52,810 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:11:52,810 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:11:52,810 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:11:52,810 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:11:52,810 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:11:52,810 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:52,810 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:11:52,810 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:11:52,811 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration4_Loop [2020-11-28 03:11:52,811 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:11:52,811 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:11:52,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,818 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,836 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:11:52,906 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:11:52,906 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:52,917 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 [2020-11-28 03:11:52,919 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:52,919 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:52,920 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:52,920 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:52,920 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:52,921 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:52,922 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:52,928 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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 [2020-11-28 03:11:52,968 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 [2020-11-28 03:11:52,969 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:52,970 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:52,970 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:52,970 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:52,970 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:52,973 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:52,974 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:11:52,978 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/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) [2020-11-28 03:11:53,029 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 [2020-11-28 03:11:53,032 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:11:53,032 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:11:53,032 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:11:53,032 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:11:53,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:11:53,042 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:11:53,042 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:53,047 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:11:53,052 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:11:53,052 INFO L444 ModelExtractionUtils]: 0 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_d93e0a15-2488-42c5-aaff-fc9c2cc89f71/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:11:53,059 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:11:53,060 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:11:53,066 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:11:53,066 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 99 Supporting invariants [] Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:11:53,111 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:11:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:53,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-28 03:11:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:53,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:53,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:11:53,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:53,190 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-28 03:11:53,191 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 16 transitions. cyclomatic complexity: 3 Second operand 4 states. [2020-11-28 03:11:53,211 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 14 states and 16 transitions. cyclomatic complexity: 3. Second operand 4 states. Result 26 states and 30 transitions. Complement of second has 6 states. [2020-11-28 03:11:53,213 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 [2020-11-28 03:11:53,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-28 03:11:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-28 03:11:53,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 3 letters. [2020-11-28 03:11:53,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:53,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 11 letters. Loop has 3 letters. [2020-11-28 03:11:53,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:53,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 6 letters. [2020-11-28 03:11:53,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:11:53,214 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 30 transitions. [2020-11-28 03:11:53,216 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:11:53,216 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 0 states and 0 transitions. [2020-11-28 03:11:53,216 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:11:53,216 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:11:53,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:11:53,216 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:11:53,217 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:11:53,217 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:11:53,217 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:11:53,217 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 03:11:53,217 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:11:53,217 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:11:53,217 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 03:11:53,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:11:53 BoogieIcfgContainer [2020-11-28 03:11:53,224 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:11:53,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:11:53,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:11:53,225 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:11:53,228 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:47" (3/4) ... [2020-11-28 03:11:53,232 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:11:53,232 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:11:53,241 INFO L168 Benchmark]: Toolchain (without parser) took 6418.43 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 54.0 MB in the beginning and 45.6 MB in the end (delta: 8.4 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:53,241 INFO L168 Benchmark]: CDTParser took 1.50 ms. Allocated memory is still 90.2 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:53,242 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.64 ms. Allocated memory is still 90.2 MB. Free memory was 53.8 MB in the beginning and 67.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:53,243 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.92 ms. Allocated memory is still 90.2 MB. Free memory was 67.1 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:53,244 INFO L168 Benchmark]: Boogie Preprocessor took 41.05 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 64.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:53,246 INFO L168 Benchmark]: RCFGBuilder took 413.91 ms. Allocated memory is still 90.2 MB. Free memory was 64.7 MB in the beginning and 54.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:53,251 INFO L168 Benchmark]: BuchiAutomizer took 5551.87 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 53.8 MB in the beginning and 46.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:53,252 INFO L168 Benchmark]: Witness Printer took 7.82 ms. Allocated memory is still 117.4 MB. Free memory was 46.5 MB in the beginning and 45.6 MB in the end (delta: 927.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:53,258 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.50 ms. Allocated memory is still 90.2 MB. Free memory is still 70.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.64 ms. Allocated memory is still 90.2 MB. Free memory was 53.8 MB in the beginning and 67.1 MB in the end (delta: -13.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.92 ms. Allocated memory is still 90.2 MB. Free memory was 67.1 MB in the beginning and 65.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.05 ms. Allocated memory is still 90.2 MB. Free memory was 65.8 MB in the beginning and 64.7 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 413.91 ms. Allocated memory is still 90.2 MB. Free memory was 64.7 MB in the beginning and 54.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5551.87 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 53.8 MB in the beginning and 46.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 37.4 MB. Max. memory is 16.1 GB. * Witness Printer took 7.82 ms. Allocated memory is still 117.4 MB. Free memory was 46.5 MB in the beginning and 45.6 MB in the end (delta: 927.7 kB). 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 7 terminating modules (3 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function y and consists of 5 locations. One deterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. One deterministic module has affine ranking function -2 * x + 99 and consists of 4 locations. One nondeterministic module has affine ranking function 2 * y + 1 and consists of 3 locations. 3 modules have a trivial ranking function, the largest among these consists of 6 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.4s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 4.3s. Construction of modules took 0.1s. Büchi inclusion checks took 0.7s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 7 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 3. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 50 SDtfs, 44 SDslu, 26 SDs, 0 SdLazy, 64 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT3 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax100 hnf91 lsp55 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie102 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 24ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 3 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...