./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_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loop-lit/gr2006.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:17,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:33:17,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:33:17,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:33:17,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:33:17,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:33:17,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:33:17,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:33:17,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:33:17,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:33:17,222 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:33:17,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:33:17,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:33:17,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:33:17,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:33:17,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:33:17,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:33:17,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:33:17,235 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:33:17,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:33:17,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:33:17,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:33:17,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:33:17,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:33:17,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:33:17,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:33:17,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:33:17,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:33:17,253 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:33:17,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:33:17,256 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:33:17,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:33:17,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:33:17,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:33:17,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:33:17,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:33:17,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:33:17,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:33:17,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:33:17,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:33:17,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:33:17,268 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-30 01:33:17,296 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:33:17,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:33:17,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:33:17,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:33:17,300 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:33:17,300 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 01:33:17,301 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 01:33:17,301 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 01:33:17,301 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 01:33:17,302 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 01:33:17,302 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 01:33:17,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:33:17,303 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:33:17,304 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:33:17,304 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:33:17,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:33:17,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:33:17,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 01:33:17,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 01:33:17,306 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 01:33:17,307 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:33:17,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:33:17,307 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 01:33:17,308 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:33:17,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 01:33:17,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:33:17,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:33:17,309 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 01:33:17,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:33:17,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:33:17,310 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:33:17,310 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 01:33:17,312 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 01:33:17,312 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e5710d6b4e91b9251f64aef4f8b0515c8f0428d2 [2020-11-30 01:33:17,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:33:17,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:33:17,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:33:17,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:33:17,722 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:33:17,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gr2006.i [2020-11-30 01:33:17,802 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/data/ebe0a885e/2b38b82444914f6ca6209e04edcf484e/FLAG8b84338c6 [2020-11-30 01:33:18,357 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:33:18,358 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/sv-benchmarks/c/loop-lit/gr2006.i [2020-11-30 01:33:18,364 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/data/ebe0a885e/2b38b82444914f6ca6209e04edcf484e/FLAG8b84338c6 [2020-11-30 01:33:18,727 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/data/ebe0a885e/2b38b82444914f6ca6209e04edcf484e [2020-11-30 01:33:18,730 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:33:18,732 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:33:18,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:33:18,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:33:18,737 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:33:18,738 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:18,741 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ee37e93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18, skipping insertion in model container [2020-11-30 01:33:18,741 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:18,749 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:33:18,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:33:18,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:33:18,950 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:33:18,973 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:33:18,997 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:33:18,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18 WrapperNode [2020-11-30 01:33:19,000 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:33:19,003 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:33:19,003 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:33:19,004 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:33:19,014 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,028 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:33:19,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:33:19,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:33:19,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:33:19,061 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,083 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,087 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,089 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... [2020-11-30 01:33:19,090 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:33:19,091 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:33:19,092 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:33:19,092 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:33:19,095 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:19,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:33:19,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:33:19,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:33:19,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:33:19,419 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:33:19,419 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:33:19,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:19 BoogieIcfgContainer [2020-11-30 01:33:19,422 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:33:19,424 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 01:33:19,424 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 01:33:19,428 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 01:33:19,429 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 01:33:19,429 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 01:33:18" (1/3) ... [2020-11-30 01:33:19,447 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@71335405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 01:33:19, skipping insertion in model container [2020-11-30 01:33:19,448 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 01:33:19,448 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:33:18" (2/3) ... [2020-11-30 01:33:19,448 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@71335405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 01:33:19, skipping insertion in model container [2020-11-30 01:33:19,449 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 01:33:19,449 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:19" (3/3) ... [2020-11-30 01:33:19,450 INFO L373 chiAutomizerObserver]: Analyzing ICFG gr2006.i [2020-11-30 01:33:19,564 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 01:33:19,564 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 01:33:19,564 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 01:33:19,565 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:33:19,565 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:33:19,565 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 01:33:19,565 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:33:19,565 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 01:33:19,594 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-30 01:33:19,631 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:19,632 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:33:19,632 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:33:19,643 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-30 01:33:19,643 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 01:33:19,644 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 01:33:19,644 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states. [2020-11-30 01:33:19,645 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:19,646 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:33:19,646 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:33:19,646 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-30 01:33:19,646 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 01:33:19,655 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 [2020-11-30 01:33:19,656 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 [2020-11-30 01:33:19,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:19,664 INFO L82 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2020-11-30 01:33:19,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:19,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285029120] [2020-11-30 01:33:19,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:19,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:19,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:19,813 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:19,837 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:19,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:19,840 INFO L82 PathProgramCache]: Analyzing trace with hash 40880, now seen corresponding path program 1 times [2020-11-30 01:33:19,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:19,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133371486] [2020-11-30 01:33:19,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:19,850 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:19,856 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:19,860 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:19,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:19,863 INFO L82 PathProgramCache]: Analyzing trace with hash 28699822, now seen corresponding path program 1 times [2020-11-30 01:33:19,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:19,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081632089] [2020-11-30 01:33:19,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:19,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081632089] [2020-11-30 01:33:19,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:33:19,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:33:19,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491105110] [2020-11-30 01:33:20,055 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:20,056 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:20,056 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:20,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:20,057 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 01:33:20,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:20,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:20,057 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:20,057 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2020-11-30 01:33:20,058 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:20,058 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:20,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,132 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,288 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:20,289 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:20,319 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:20,319 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 [2020-11-30 01:33:20,328 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:20,328 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:20,363 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:20,364 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:20,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:20,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:20,416 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:20,417 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:20,445 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:20,445 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:20,473 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:20,473 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:20,539 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 01:33:20,546 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:20,546 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:20,546 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:20,546 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:20,547 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 01:33:20,547 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:20,547 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:20,547 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:20,547 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration1_Loop [2020-11-30 01:33:20,547 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:20,547 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:20,548 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,572 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,584 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,597 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:20,686 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:20,691 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:20,696 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 [2020-11-30 01:33:20,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:20,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:20,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:20,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:20,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:20,707 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:20,707 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:20,716 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:20,756 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 [2020-11-30 01:33:20,758 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:20,758 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:20,758 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:20,759 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:20,759 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:20,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:20,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:20,767 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:20,794 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 [2020-11-30 01:33:20,795 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:20,796 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:20,796 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:20,796 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:20,796 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:20,797 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:20,798 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:20,800 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 01:33:20,811 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 01:33:20,811 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:20,819 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 01:33:20,820 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 01:33:20,820 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 01:33:20,820 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 [2020-11-30 01:33:20,858 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 01:33:20,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:20,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:20,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:33:20,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:20,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:20,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:21,006 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 [2020-11-30 01:33:21,008 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states. Second operand 4 states. [2020-11-30 01:33:21,081 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. [2020-11-30 01:33:21,084 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 [2020-11-30 01:33:21,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 01:33:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 27 transitions. [2020-11-30 01:33:21,089 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 2 letters. Loop has 3 letters. [2020-11-30 01:33:21,090 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:21,090 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 5 letters. Loop has 3 letters. [2020-11-30 01:33:21,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:21,091 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 27 transitions. Stem has 2 letters. Loop has 6 letters. [2020-11-30 01:33:21,091 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:21,092 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 59 transitions. [2020-11-30 01:33:21,103 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:21,108 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 10 states and 13 transitions. [2020-11-30 01:33:21,109 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-30 01:33:21,110 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-11-30 01:33:21,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2020-11-30 01:33:21,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 01:33:21,111 INFO L691 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-30 01:33:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2020-11-30 01:33:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-30 01:33:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 01:33:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2020-11-30 01:33:21,181 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2020-11-30 01:33:21,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:33:21,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:33:21,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:33:21,190 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand 3 states. [2020-11-30 01:33:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:33:21,204 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2020-11-30 01:33:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:33:21,205 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2020-11-30 01:33:21,205 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:21,206 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 8 states and 9 transitions. [2020-11-30 01:33:21,206 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-30 01:33:21,206 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2020-11-30 01:33:21,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2020-11-30 01:33:21,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 01:33:21,207 INFO L691 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2020-11-30 01:33:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2020-11-30 01:33:21,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2020-11-30 01:33:21,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-30 01:33:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2020-11-30 01:33:21,208 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-30 01:33:21,208 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-11-30 01:33:21,208 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 01:33:21,209 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2020-11-30 01:33:21,209 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:21,209 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:33:21,209 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:33:21,210 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-30 01:33:21,210 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 01:33:21,210 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 [2020-11-30 01:33:21,210 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 [2020-11-30 01:33:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2020-11-30 01:33:21,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:21,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328151420] [2020-11-30 01:33:21,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:21,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:21,227 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:21,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:21,237 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:21,241 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:21,242 INFO L82 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 2 times [2020-11-30 01:33:21,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:21,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884419360] [2020-11-30 01:33:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:21,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:21,248 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:21,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:21,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:21,253 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1810665941, now seen corresponding path program 1 times [2020-11-30 01:33:21,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:21,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486307706] [2020-11-30 01:33:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:21,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486307706] [2020-11-30 01:33:21,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111467571] [2020-11-30 01:33:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:21,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 01:33:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:21,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:33:21,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2020-11-30 01:33:21,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446822339] [2020-11-30 01:33:21,404 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:21,404 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:21,404 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:21,405 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:21,405 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 01:33:21,405 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:21,405 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:21,405 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:21,405 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2020-11-30 01:33:21,405 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:21,405 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:21,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,483 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:21,484 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 01:33:21,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:21,524 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:21,570 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:21,570 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 [2020-11-30 01:33:21,616 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:21,616 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:21,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:21,649 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:21,651 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:21,652 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:21,677 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:21,677 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:21,682 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:21,682 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:21,707 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:21,707 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:21,733 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:21,733 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:21,775 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 01:33:21,777 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:21,777 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:21,777 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:21,778 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:21,778 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 01:33:21,778 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:21,778 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:21,778 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:21,778 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration2_Loop [2020-11-30 01:33:21,778 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:21,778 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:21,780 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:21,894 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:21,894 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:21,902 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 [2020-11-30 01:33:21,903 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:21,903 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:21,904 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:21,904 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:21,904 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:21,905 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:21,905 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:21,907 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:21,932 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 [2020-11-30 01:33:21,933 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:21,933 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:21,933 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:21,934 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:21,934 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:21,939 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:21,939 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:21,941 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:21,966 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 [2020-11-30 01:33:21,967 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:21,967 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:21,967 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:21,968 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:21,968 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:21,968 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:21,969 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:21,970 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:22,003 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 [2020-11-30 01:33:22,005 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:22,005 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:22,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:22,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:22,006 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:22,007 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:22,007 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:22,013 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 01:33:22,020 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 01:33:22,020 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:22,025 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 01:33:22,025 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:22,033 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 01:33:22,033 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2020-11-30 01:33:22,070 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 01:33:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:22,140 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 [2020-11-30 01:33:22,140 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-30 01:33:22,156 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. [2020-11-30 01:33:22,157 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 [2020-11-30 01:33:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 01:33:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-11-30 01:33:22,157 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 3 letters. [2020-11-30 01:33:22,157 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:22,158 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-30 01:33:22,158 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:22,158 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 4 letters. Loop has 6 letters. [2020-11-30 01:33:22,158 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:22,158 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2020-11-30 01:33:22,159 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:22,159 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 16 transitions. [2020-11-30 01:33:22,160 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-30 01:33:22,160 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-30 01:33:22,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 16 transitions. [2020-11-30 01:33:22,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 01:33:22,160 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-11-30 01:33:22,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 16 transitions. [2020-11-30 01:33:22,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-30 01:33:22,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 01:33:22,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2020-11-30 01:33:22,162 INFO L714 BuchiCegarLoop]: Abstraction has 13 states and 16 transitions. [2020-11-30 01:33:22,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:33:22,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:33:22,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:33:22,163 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand 5 states. [2020-11-30 01:33:22,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:33:22,189 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2020-11-30 01:33:22,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:33:22,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2020-11-30 01:33:22,190 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:22,191 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 11 states and 12 transitions. [2020-11-30 01:33:22,191 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2020-11-30 01:33:22,191 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2020-11-30 01:33:22,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2020-11-30 01:33:22,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 01:33:22,191 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-30 01:33:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2020-11-30 01:33:22,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 10. [2020-11-30 01:33:22,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-30 01:33:22,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2020-11-30 01:33:22,193 INFO L714 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-30 01:33:22,193 INFO L594 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2020-11-30 01:33:22,194 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 01:33:22,194 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2020-11-30 01:33:22,194 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-11-30 01:33:22,194 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:33:22,194 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:33:22,195 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2020-11-30 01:33:22,195 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 01:33:22,195 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 [2020-11-30 01:33:22,195 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 [2020-11-30 01:33:22,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1810665939, now seen corresponding path program 1 times [2020-11-30 01:33:22,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:22,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20118775] [2020-11-30 01:33:22,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:22,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:22,215 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:22,232 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:22,244 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:22,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,247 INFO L82 PathProgramCache]: Analyzing trace with hash 51290, now seen corresponding path program 3 times [2020-11-30 01:33:22,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:22,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071612578] [2020-11-30 01:33:22,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:22,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:22,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:22,264 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:22,266 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:22,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1054739784, now seen corresponding path program 2 times [2020-11-30 01:33:22,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:22,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150122094] [2020-11-30 01:33:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:22,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,335 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150122094] [2020-11-30 01:33:22,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175910753] [2020-11-30 01:33:22,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:22,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 01:33:22,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:33:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:22,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 01:33:22,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-30 01:33:22,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953790010] [2020-11-30 01:33:22,424 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:22,424 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:22,424 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:22,424 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:22,424 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 01:33:22,424 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:22,424 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:22,424 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:22,425 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2020-11-30 01:33:22,425 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:22,425 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:22,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,444 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,497 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:22,497 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:22,510 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:22,511 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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 [2020-11-30 01:33:22,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:22,545 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:22,587 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 01:33:22,589 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:22,589 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:22,589 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:22,589 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:22,589 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 01:33:22,589 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:22,590 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:22,590 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:22,590 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration3_Loop [2020-11-30 01:33:22,590 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:22,590 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:22,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,602 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,605 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:22,663 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:22,663 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:22,674 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 Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:22,676 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:22,676 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:22,676 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:22,676 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:22,676 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:22,677 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:22,677 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:22,679 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 01:33:22,683 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 01:33:22,683 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:22,686 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 01:33:22,686 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 01:33:22,686 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 01:33:22,686 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0) = 2*ULTIMATE.start_main_~y~0 + 1 Supporting invariants [] [2020-11-30 01:33:22,707 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 01:33:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:22,841 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 [2020-11-30 01:33:22,841 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-30 01:33:22,855 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. [2020-11-30 01:33:22,855 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 [2020-11-30 01:33:22,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 01:33:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 01:33:22,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-30 01:33:22,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:22,856 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 01:33:22,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:22,925 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 [2020-11-30 01:33:22,925 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-30 01:33:22,934 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. [2020-11-30 01:33:22,935 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 [2020-11-30 01:33:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 01:33:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-11-30 01:33:22,935 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-30 01:33:22,936 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:22,936 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 01:33:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:22,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:22,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:22,998 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 [2020-11-30 01:33:22,998 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 3 states. [2020-11-30 01:33:23,017 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. [2020-11-30 01:33:23,018 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 [2020-11-30 01:33:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 01:33:23,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 10 transitions. [2020-11-30 01:33:23,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 3 letters. [2020-11-30 01:33:23,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:23,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 10 letters. Loop has 3 letters. [2020-11-30 01:33:23,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:23,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 10 transitions. Stem has 7 letters. Loop has 6 letters. [2020-11-30 01:33:23,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:23,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 17 transitions. [2020-11-30 01:33:23,021 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-30 01:33:23,021 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 13 states and 15 transitions. [2020-11-30 01:33:23,021 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2020-11-30 01:33:23,021 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2020-11-30 01:33:23,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 15 transitions. [2020-11-30 01:33:23,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 01:33:23,022 INFO L691 BuchiCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-30 01:33:23,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 15 transitions. [2020-11-30 01:33:23,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 11. [2020-11-30 01:33:23,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 01:33:23,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-11-30 01:33:23,023 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-11-30 01:33:23,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:33:23,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:33:23,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:33:23,024 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 6 states. [2020-11-30 01:33:23,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:33:23,047 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2020-11-30 01:33:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:33:23,048 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 22 transitions. [2020-11-30 01:33:23,049 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-30 01:33:23,049 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 17 states and 20 transitions. [2020-11-30 01:33:23,049 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2020-11-30 01:33:23,050 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-11-30 01:33:23,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 20 transitions. [2020-11-30 01:33:23,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 01:33:23,050 INFO L691 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-30 01:33:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 20 transitions. [2020-11-30 01:33:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2020-11-30 01:33:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:33:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-30 01:33:23,052 INFO L714 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-30 01:33:23,052 INFO L594 BuchiCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-30 01:33:23,052 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 01:33:23,052 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 16 transitions. [2020-11-30 01:33:23,053 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2020-11-30 01:33:23,053 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 01:33:23,053 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 01:33:23,053 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 2, 1, 1] [2020-11-30 01:33:23,053 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 01:33:23,054 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 [2020-11-30 01:33:23,054 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 [2020-11-30 01:33:23,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:23,054 INFO L82 PathProgramCache]: Analyzing trace with hash 296069283, now seen corresponding path program 2 times [2020-11-30 01:33:23,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:23,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787097867] [2020-11-30 01:33:23,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:23,064 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:23,073 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:23,076 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:23,076 INFO L82 PathProgramCache]: Analyzing trace with hash 40818, now seen corresponding path program 1 times [2020-11-30 01:33:23,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:23,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029249439] [2020-11-30 01:33:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:23,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:23,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:23,083 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:23,084 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:23,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:23,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1662805104, now seen corresponding path program 3 times [2020-11-30 01:33:23,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:33:23,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889871671] [2020-11-30 01:33:23,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:33:23,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:23,095 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:33:23,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:33:23,114 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:33:23,146 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:23,147 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:23,147 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:23,147 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:23,147 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 01:33:23,147 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,147 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:23,147 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:23,147 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration4_Loop [2020-11-30 01:33:23,147 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:23,147 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:23,148 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,222 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:23,223 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:23,226 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:23,226 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 [2020-11-30 01:33:23,228 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:23,228 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,251 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:23,251 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,276 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:23,276 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 01:33:23,308 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 01:33:23,308 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,329 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 01:33:23,330 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:23,375 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 01:33:23,375 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 [2020-11-30 01:33:23,416 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 01:33:23,418 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 01:33:23,418 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 01:33:23,418 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 01:33:23,419 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 01:33:23,419 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 01:33:23,419 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,419 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 01:33:23,419 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 01:33:23,419 INFO L133 ssoRankerPreferences]: Filename of dumped script: gr2006.i_Iteration4_Loop [2020-11-30 01:33:23,419 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 01:33:23,419 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 01:33:23,420 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,441 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 01:33:23,494 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 01:33:23,494 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:23,502 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 [2020-11-30 01:33:23,504 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:23,504 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:23,504 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:23,504 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:23,505 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:23,506 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:23,506 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 [2020-11-30 01:33:23,508 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) [2020-11-30 01:33:23,545 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 [2020-11-30 01:33:23,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:23,547 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:23,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:23,548 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:23,548 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:23,550 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:23,550 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,553 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a84321a2-f76e-4200-bdc6-e777849a1d5f/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,580 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 [2020-11-30 01:33:23,582 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 01:33:23,582 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 01:33:23,582 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 01:33:23,582 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 01:33:23,582 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 01:33:23,583 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 01:33:23,583 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 01:33:23,586 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 01:33:23,594 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 01:33:23,594 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_a84321a2-f76e-4200-bdc6-e777849a1d5f/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) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 01:33:23,599 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 01:33:23,599 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 01:33:23,599 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 01:33:23,599 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 99 Supporting invariants [] [2020-11-30 01:33:23,620 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 01:33:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:33:23,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:23,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 01:33:23,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:33:23,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 01:33:23,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:33:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:33:23,711 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 [2020-11-30 01:33:23,711 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 14 states and 16 transitions. cyclomatic complexity: 3 Second operand 4 states. [2020-11-30 01:33:23,736 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. [2020-11-30 01:33:23,737 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 [2020-11-30 01:33:23,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 01:33:23,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-30 01:33:23,738 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 3 letters. [2020-11-30 01:33:23,738 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:23,738 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 11 letters. Loop has 3 letters. [2020-11-30 01:33:23,738 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:23,738 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 8 letters. Loop has 6 letters. [2020-11-30 01:33:23,739 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 01:33:23,739 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 30 transitions. [2020-11-30 01:33:23,740 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 01:33:23,740 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 0 states and 0 transitions. [2020-11-30 01:33:23,740 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 01:33:23,740 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 01:33:23,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 01:33:23,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 01:33:23,741 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:33:23,741 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:33:23,741 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:33:23,741 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-30 01:33:23,741 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:33:23,741 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 01:33:23,741 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 01:33:23,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 01:33:23 BoogieIcfgContainer [2020-11-30 01:33:23,747 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 01:33:23,747 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:33:23,748 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:33:23,748 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:33:23,748 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:33:19" (3/4) ... [2020-11-30 01:33:23,751 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 01:33:23,751 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:33:23,753 INFO L168 Benchmark]: Toolchain (without parser) took 5020.44 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 76.3 MB in the beginning and 117.7 MB in the end (delta: -41.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:23,754 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 102.8 MB. Free memory was 59.4 MB in the beginning and 59.4 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:23,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.72 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 80.8 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:23,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.26 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:23,755 INFO L168 Benchmark]: Boogie Preprocessor took 39.37 ms. Allocated memory is still 102.8 MB. Free memory was 79.4 MB in the beginning and 78.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:23,756 INFO L168 Benchmark]: RCFGBuilder took 331.36 ms. Allocated memory is still 102.8 MB. Free memory was 78.3 MB in the beginning and 67.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:33:23,757 INFO L168 Benchmark]: BuchiAutomizer took 4323.28 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 67.5 MB in the beginning and 118.8 MB in the end (delta: -51.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:23,757 INFO L168 Benchmark]: Witness Printer took 3.98 ms. Allocated memory is still 148.9 MB. Free memory was 118.8 MB in the beginning and 117.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:33:23,760 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 102.8 MB. Free memory was 59.4 MB in the beginning and 59.4 MB in the end (delta: 78.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 267.72 ms. Allocated memory is still 102.8 MB. Free memory was 76.3 MB in the beginning and 80.8 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.26 ms. Allocated memory is still 102.8 MB. Free memory was 80.8 MB in the beginning and 79.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.37 ms. Allocated memory is still 102.8 MB. Free memory was 79.4 MB in the beginning and 78.3 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 331.36 ms. Allocated memory is still 102.8 MB. Free memory was 78.3 MB in the beginning and 67.5 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4323.28 ms. Allocated memory was 102.8 MB in the beginning and 148.9 MB in the end (delta: 46.1 MB). Free memory was 67.5 MB in the beginning and 118.8 MB in the end (delta: -51.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 3.98 ms. Allocated memory is still 148.9 MB. Free memory was 118.8 MB in the beginning and 117.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 4.2s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 3.1s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. 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: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...