./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c --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_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 92a849e92f30134540f9595cfce3299e46e1c2b1 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:06:04,469 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:06:04,472 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:06:04,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:06:04,551 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:06:04,558 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:06:04,562 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:06:04,566 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:06:04,568 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:06:04,579 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:06:04,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:06:04,583 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:06:04,583 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:06:04,587 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:06:04,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:06:04,591 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:06:04,592 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:06:04,593 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:06:04,600 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:06:04,607 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:06:04,609 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:06:04,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:06:04,613 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:06:04,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:06:04,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:06:04,620 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:06:04,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:06:04,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:06:04,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:06:04,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:06:04,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:06:04,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:06:04,628 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:06:04,629 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:06:04,631 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:06:04,631 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:06:04,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:06:04,632 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:06:04,632 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:06:04,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:06:04,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:06:04,636 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-28 03:06:04,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:06:04,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:06:04,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:06:04,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:06:04,677 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:06:04,678 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-28 03:06:04,678 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-28 03:06:04,678 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-28 03:06:04,678 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-28 03:06:04,678 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-28 03:06:04,679 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-28 03:06:04,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:06:04,680 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:06:04,680 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 03:06:04,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:06:04,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:06:04,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:06:04,681 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-28 03:06:04,681 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-28 03:06:04,681 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-28 03:06:04,681 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:06:04,682 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:06:04,682 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-28 03:06:04,682 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:06:04,682 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-28 03:06:04,682 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:06:04,683 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:06:04,683 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-28 03:06:04,683 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:06:04,683 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:06:04,684 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:06:04,684 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-28 03:06:04,685 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-28 03:06:04,685 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_5ebabf57-9077-456a-ae05-ca49c32a29aa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 92a849e92f30134540f9595cfce3299e46e1c2b1 [2020-11-28 03:06:04,920 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:06:04,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:06:04,959 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:06:04,961 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:06:04,961 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:06:04,963 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-11-28 03:06:05,035 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/data/f1f3f30de/cf56f28c284e440a9a7cd0fec06b9c86/FLAG63c62456e [2020-11-28 03:06:05,568 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:06:05,569 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/sv-benchmarks/c/recursive-simple/fibo_2calls_6-2.c [2020-11-28 03:06:05,579 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/data/f1f3f30de/cf56f28c284e440a9a7cd0fec06b9c86/FLAG63c62456e [2020-11-28 03:06:05,958 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/data/f1f3f30de/cf56f28c284e440a9a7cd0fec06b9c86 [2020-11-28 03:06:05,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:06:05,966 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:06:05,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:06:05,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:06:05,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:06:05,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:06:05" (1/1) ... [2020-11-28 03:06:05,982 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bee5f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:05, skipping insertion in model container [2020-11-28 03:06:05,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:06:05" (1/1) ... [2020-11-28 03:06:05,990 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:06:06,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:06:06,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:06:06,251 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:06:06,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:06:06,291 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:06:06,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06 WrapperNode [2020-11-28 03:06:06,294 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:06:06,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:06:06,296 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:06:06,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:06:06,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,330 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:06:06,331 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:06:06,331 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:06:06,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:06:06,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... [2020-11-28 03:06:06,362 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:06:06,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:06:06,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:06:06,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:06:06,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:06,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:06:06,447 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-28 03:06:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-28 03:06:06,447 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:06:06,447 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-28 03:06:06,447 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-28 03:06:06,447 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:06:06,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:06:06,903 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:06:06,903 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-28 03:06:06,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:06 BoogieIcfgContainer [2020-11-28 03:06:06,905 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:06:06,906 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-28 03:06:06,906 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-28 03:06:06,909 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-28 03:06:06,910 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:06:06,910 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.11 03:06:05" (1/3) ... [2020-11-28 03:06:06,912 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@ea5abef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:06:06, skipping insertion in model container [2020-11-28 03:06:06,912 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:06:06,912 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:06:06" (2/3) ... [2020-11-28 03:06:06,913 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@ea5abef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.11 03:06:06, skipping insertion in model container [2020-11-28 03:06:06,913 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-28 03:06:06,913 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:06" (3/3) ... [2020-11-28 03:06:06,914 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_6-2.c [2020-11-28 03:06:06,970 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-28 03:06:06,970 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-28 03:06:06,970 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-28 03:06:06,971 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:06:06,971 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:06:06,971 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-28 03:06:06,971 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:06:06,971 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-28 03:06:06,985 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:06:07,003 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:07,003 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:07,003 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:07,008 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:06:07,008 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:07,008 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-28 03:06:07,008 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-28 03:06:07,011 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:07,012 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:07,012 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:07,012 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-28 03:06:07,013 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:07,019 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 12#L-1true havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-11-28 03:06:07,019 INFO L796 eck$LassoCheckResult]: Loop: 27#fibo1ENTRYtrue ~n := #in~n; 4#L10true assume !(~n < 1); 10#L12true assume !(1 == ~n); 13#L15true call #t~ret7 := fibo2(~n - 1);< 15#fibo2ENTRYtrue ~n := #in~n; 28#L20true assume !(~n < 1); 20#L22true assume !(1 == ~n); 9#L25true call #t~ret9 := fibo1(~n - 1);< 27#fibo1ENTRYtrue [2020-11-28 03:06:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-11-28 03:06:07,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:07,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608213906] [2020-11-28 03:06:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:07,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:07,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:07,150 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:07,169 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:07,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:07,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-11-28 03:06:07,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:07,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031987624] [2020-11-28 03:06:07,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:07,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:07,181 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:07,187 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:07,190 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:07,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:07,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-11-28 03:06:07,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:07,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64860832] [2020-11-28 03:06:07,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:07,259 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:07,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:07,298 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:07,316 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:07,554 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:07,557 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:07,557 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:07,557 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:07,558 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:07,558 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:07,558 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:07,559 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:07,559 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration1_Loop [2020-11-28 03:06:07,559 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:07,560 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:07,582 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,591 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,618 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:07,784 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:07,785 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:07,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:07,800 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:07,810 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:07,811 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:07,860 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:07,860 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:07,864 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:07,864 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:07,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:07,896 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:07,900 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:07,900 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#in~n=0} Honda state: {fibo2_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:07,946 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:07,946 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:07,950 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:07,950 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:07,999 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:07,999 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,005 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:08,006 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:08,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:08,082 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,101 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:08,101 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,129 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:08,130 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:08,139 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:08,139 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:08,163 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:08,166 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:08,166 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:08,192 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,226 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:08,226 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:08,316 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:08,318 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:08,318 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:08,318 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:08,318 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:08,318 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:08,318 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,319 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:08,319 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:08,319 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration1_Loop [2020-11-28 03:06:08,319 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:08,319 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:08,320 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,326 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,361 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,365 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:08,483 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:08,488 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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) [2020-11-28 03:06:08,495 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,498 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,498 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,501 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,501 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,507 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:08,556 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,558 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,558 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,558 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,559 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,559 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,560 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,560 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,562 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,608 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,609 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,610 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,610 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,610 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,610 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,611 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,611 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:08,613 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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) [2020-11-28 03:06:08,657 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,658 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,658 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,659 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,659 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,659 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,660 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,660 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,662 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,704 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,706 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,706 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,706 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,706 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,706 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,709 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,710 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:08,715 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:08,741 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,743 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,743 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,743 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,743 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,743 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,744 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,744 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:08,745 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:08,769 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,770 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,770 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,770 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,770 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,770 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,771 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,771 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:08,783 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:08,807 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,809 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,809 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,809 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,810 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,810 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,811 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,811 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:08,813 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:08,875 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:08,877 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:08,877 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:08,878 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:08,878 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:08,878 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:08,879 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:08,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,883 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:08,887 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:06:08,887 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:08,896 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:08,898 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:08,898 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:08,899 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-11-28 03:06:08,938 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:09,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 03:06:09,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:09,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:09,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:09,165 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-28 03:06:09,167 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-11-28 03:06:09,470 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states.. Second operand 6 states. Result 85 states and 117 transitions. Complement of second has 24 states. [2020-11-28 03:06:09,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 1 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-28 03:06:09,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-11-28 03:06:09,476 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-28 03:06:09,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:09,480 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-28 03:06:09,481 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:09,481 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-11-28 03:06:09,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:09,484 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-11-28 03:06:09,496 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:09,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-11-28 03:06:09,506 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-28 03:06:09,507 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-28 03:06:09,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-11-28 03:06:09,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:09,509 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-11-28 03:06:09,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-11-28 03:06:09,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-28 03:06:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-28 03:06:09,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-28 03:06:09,540 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:06:09,540 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-28 03:06:09,540 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-28 03:06:09,540 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-11-28 03:06:09,542 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:09,542 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:09,542 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:09,544 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:09,544 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:09,544 INFO L794 eck$LassoCheckResult]: Stem: 234#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 230#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 216#L39 call main_#t~ret11 := fibo1(main_~x~0);< 222#fibo1ENTRY ~n := #in~n; 215#L10 assume !(~n < 1); 217#L12 assume !(1 == ~n); 201#L15 call #t~ret7 := fibo2(~n - 1);< 233#fibo2ENTRY ~n := #in~n; 237#L20 assume !(~n < 1); 251#L22 assume !(1 == ~n); 212#L25 call #t~ret9 := fibo1(~n - 1);< 227#fibo1ENTRY ~n := #in~n; 211#L10 assume ~n < 1;#res := 0; 213#fibo1FINAL assume true; 220#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:06:09,545 INFO L796 eck$LassoCheckResult]: Loop: 221#L25-1 call #t~ret10 := fibo1(~n - 2);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume !(~n < 1); 247#L12 assume !(1 == ~n); 200#L15 call #t~ret7 := fibo2(~n - 1);< 239#fibo2ENTRY ~n := #in~n; 244#L20 assume !(~n < 1); 243#L22 assume !(1 == ~n); 224#L25 call #t~ret9 := fibo1(~n - 1);< 226#fibo1ENTRY ~n := #in~n; 246#L10 assume ~n < 1;#res := 0; 225#fibo1FINAL assume true; 229#fibo1EXIT >#48#return; 221#L25-1 [2020-11-28 03:06:09,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:09,545 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-11-28 03:06:09,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:09,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792541024] [2020-11-28 03:06:09,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:06:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:09,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792541024] [2020-11-28 03:06:09,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:06:09,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:06:09,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517289426] [2020-11-28 03:06:09,671 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:09,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:09,672 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-11-28 03:06:09,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:09,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769938924] [2020-11-28 03:06:09,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:09,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:09,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769938924] [2020-11-28 03:06:09,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:06:09,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 03:06:09,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450616237] [2020-11-28 03:06:09,771 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:09,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:09,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:06:09,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:06:09,776 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-11-28 03:06:09,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:09,906 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-11-28 03:06:09,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:06:09,908 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-11-28 03:06:09,911 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:09,915 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-11-28 03:06:09,915 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-11-28 03:06:09,915 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-28 03:06:09,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-11-28 03:06:09,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:09,916 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-28 03:06:09,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-11-28 03:06:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-28 03:06:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-28 03:06:09,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-11-28 03:06:09,942 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:06:09,942 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-28 03:06:09,942 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-28 03:06:09,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-11-28 03:06:09,945 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-28 03:06:09,945 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:09,945 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:09,953 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:09,953 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:09,953 INFO L794 eck$LassoCheckResult]: Stem: 375#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 374#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 355#L39 call main_#t~ret11 := fibo1(main_~x~0);< 364#fibo1ENTRY ~n := #in~n; 354#L10 assume !(~n < 1); 356#L12 assume !(1 == ~n); 346#L15 call #t~ret7 := fibo2(~n - 1);< 378#fibo2ENTRY ~n := #in~n; 399#L20 assume !(~n < 1); 400#L22 assume !(1 == ~n); 352#L25 call #t~ret9 := fibo1(~n - 1);< 371#fibo1ENTRY ~n := #in~n; 351#L10 assume !(~n < 1); 353#L12 assume 1 == ~n;#res := 1; 372#fibo1FINAL assume true; 365#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:06:09,953 INFO L796 eck$LassoCheckResult]: Loop: 366#L25-1 call #t~ret10 := fibo1(~n - 2);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume !(1 == ~n); 344#L15 call #t~ret7 := fibo2(~n - 1);< 388#fibo2ENTRY ~n := #in~n; 395#L20 assume !(~n < 1); 393#L22 assume !(1 == ~n); 368#L25 call #t~ret9 := fibo1(~n - 1);< 370#fibo1ENTRY ~n := #in~n; 389#L10 assume !(~n < 1); 390#L12 assume 1 == ~n;#res := 1; 369#fibo1FINAL assume true; 373#fibo1EXIT >#48#return; 366#L25-1 [2020-11-28 03:06:09,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:09,954 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-11-28 03:06:09,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:09,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063349098] [2020-11-28 03:06:09,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:06:10,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063349098] [2020-11-28 03:06:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390853507] [2020-11-28 03:06:10,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:10,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:06:10,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:10,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:10,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-28 03:06:10,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315346431] [2020-11-28 03:06:10,232 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:10,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:10,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-11-28 03:06:10,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:10,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12974703] [2020-11-28 03:06:10,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:10,246 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:10,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:10,254 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:10,257 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:10,490 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:10,490 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:10,491 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:10,491 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:10,491 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:10,491 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:10,491 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:10,491 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:10,491 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration3_Loop [2020-11-28 03:06:10,491 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:10,491 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:10,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,505 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:10,607 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:10,607 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:10,614 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:10,614 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:10,617 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:10,617 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:10,647 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:10,647 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:10,651 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:10,651 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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) [2020-11-28 03:06:10,698 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:10,698 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:10,702 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:10,702 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:10,740 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:10,740 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:10,749 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:10,749 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:10,782 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:10,782 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:10,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:10,818 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:11,429 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:11,430 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:11,430 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:11,431 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:11,431 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:11,431 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:11,431 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:11,431 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:11,431 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:11,431 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration3_Loop [2020-11-28 03:06:11,431 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:11,431 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:11,433 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,459 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,486 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:11,608 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:11,609 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:11,620 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:11,622 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:11,622 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:11,623 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:11,623 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:11,623 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:11,624 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:11,624 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:11,626 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:11,649 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:11,651 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:11,651 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:11,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:11,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:11,651 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:11,652 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:11,652 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:11,653 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/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 [2020-11-28 03:06:11,675 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:11,677 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:11,677 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:11,677 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:11,677 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:11,677 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:11,678 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:11,678 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:11,683 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:11,708 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:11,710 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:11,710 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:11,710 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:11,710 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:11,710 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:11,713 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:11,713 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:11,726 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:11,732 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:11,733 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:11,736 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:11,736 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:11,736 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:11,736 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:11,772 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:11,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:11,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:06:11,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:11,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:12,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:12,039 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:12,039 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-11-28 03:06:12,698 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20. Second operand 10 states. Result 191 states and 263 transitions. Complement of second has 40 states. [2020-11-28 03:06:12,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:12,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-11-28 03:06:12,701 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-11-28 03:06:12,701 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:12,702 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-11-28 03:06:12,702 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:12,702 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-11-28 03:06:12,703 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:12,704 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-11-28 03:06:12,713 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:12,719 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-11-28 03:06:12,720 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-28 03:06:12,721 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-11-28 03:06:12,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-11-28 03:06:12,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:12,722 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-11-28 03:06:12,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-11-28 03:06:12,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-11-28 03:06:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-28 03:06:12,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-11-28 03:06:12,742 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-11-28 03:06:12,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:12,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 03:06:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:06:12,743 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-11-28 03:06:12,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:12,962 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-11-28 03:06:12,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 03:06:12,964 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-11-28 03:06:12,969 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:12,975 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-11-28 03:06:12,975 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-11-28 03:06:12,976 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-11-28 03:06:12,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-11-28 03:06:12,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:12,976 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-11-28 03:06:12,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-11-28 03:06:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-11-28 03:06:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-28 03:06:12,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-11-28 03:06:12,993 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:06:12,994 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-28 03:06:12,994 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-28 03:06:12,994 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-11-28 03:06:12,997 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:12,997 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:12,997 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:13,002 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-28 03:06:13,002 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:06:13,003 INFO L794 eck$LassoCheckResult]: Stem: 1219#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 1214#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 1192#L39 call main_#t~ret11 := fibo1(main_~x~0);< 1193#fibo1ENTRY ~n := #in~n; 1257#L10 assume !(~n < 1); 1206#L12 assume !(1 == ~n); 1159#L15 call #t~ret7 := fibo2(~n - 1);< 1216#fibo2ENTRY ~n := #in~n; 1221#L20 assume !(~n < 1); 1175#L22 assume !(1 == ~n); 1176#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume !(~n < 1); 1262#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1182#L10 assume !(~n < 1); 1184#L12 assume !(1 == ~n); 1203#L15 call #t~ret7 := fibo2(~n - 1);< 1259#fibo2ENTRY ~n := #in~n; 1261#L20 assume ~n < 1;#res := 0; 1260#fibo2FINAL assume true; 1258#fibo2EXIT >#52#return; 1204#L15-1 call #t~ret8 := fibo2(~n - 2);< 1223#fibo2ENTRY ~n := #in~n; 1317#L20 assume !(~n < 1); 1316#L22 assume !(1 == ~n); 1183#L25 call #t~ret9 := fibo1(~n - 1);< 1205#fibo1ENTRY ~n := #in~n; 1256#L10 assume !(~n < 1); 1263#L12 assume 1 == ~n;#res := 1; 1264#fibo1FINAL assume true; 1251#fibo1EXIT >#48#return; 1208#L25-1 call #t~ret10 := fibo1(~n - 2);< 1213#fibo1ENTRY ~n := #in~n; 1249#L10 assume !(~n < 1); 1247#L12 assume !(1 == ~n); 1212#L15 call #t~ret7 := fibo2(~n - 1);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume ~n < 1;#res := 0; 1244#fibo2FINAL assume true; 1248#fibo2EXIT >#52#return; 1211#L15-1 call #t~ret8 := fibo2(~n - 2);< 1246#fibo2ENTRY ~n := #in~n; 1243#L20 assume !(~n < 1); 1239#L22 assume 1 == ~n;#res := 1; 1240#fibo2FINAL assume true; 1308#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:06:13,003 INFO L796 eck$LassoCheckResult]: Loop: 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume !(~n < 1); 1169#L22 assume !(1 == ~n); 1174#L25 call #t~ret9 := fibo1(~n - 1);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#48#return; 1186#L25-1 call #t~ret10 := fibo1(~n - 2);< 1300#fibo1ENTRY ~n := #in~n; 1298#L10 assume !(~n < 1); 1296#L12 assume !(1 == ~n); 1170#L15 call #t~ret7 := fibo2(~n - 1);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#52#return; 1172#L15-1 call #t~ret8 := fibo2(~n - 2);< 1215#fibo2ENTRY ~n := #in~n; 1220#L20 assume ~n < 1;#res := 0; 1173#fibo2FINAL assume true; 1310#fibo2EXIT >#54#return; 1307#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 1319#fibo1FINAL assume true; 1318#fibo1EXIT >#50#return; 1188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-28 03:06:13,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:13,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-11-28 03:06:13,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:13,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464282934] [2020-11-28 03:06:13,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-28 03:06:13,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:13,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-11-28 03:06:13,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464282934] [2020-11-28 03:06:13,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382905678] [2020-11-28 03:06:13,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:13,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:06:13,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-11-28 03:06:13,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:13,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2020-11-28 03:06:13,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231093869] [2020-11-28 03:06:13,716 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-11-28 03:06:13,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:13,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212435249] [2020-11-28 03:06:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:13,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:13,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-28 03:06:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-28 03:06:13,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212435249] [2020-11-28 03:06:13,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347018640] [2020-11-28 03:06:13,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 03:06:13,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-28 03:06:13,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:13,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-11-28 03:06:13,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022848175] [2020-11-28 03:06:13,996 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:13,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:13,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:06:13,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:06:13,997 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-11-28 03:06:14,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:14,289 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-11-28 03:06:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:06:14,290 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-11-28 03:06:14,301 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:14,304 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-11-28 03:06:14,305 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-28 03:06:14,305 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-28 03:06:14,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-11-28 03:06:14,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:14,306 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-11-28 03:06:14,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-11-28 03:06:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-11-28 03:06:14,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-28 03:06:14,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-11-28 03:06:14,347 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:06:14,347 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-28 03:06:14,347 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-28 03:06:14,347 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-11-28 03:06:14,349 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:14,350 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:14,350 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:14,352 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:14,352 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:06:14,352 INFO L794 eck$LassoCheckResult]: Stem: 2335#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2326#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 2285#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2307#fibo1ENTRY ~n := #in~n; 2284#L10 assume !(~n < 1); 2286#L12 assume !(1 == ~n); 2317#L15 call #t~ret7 := fibo2(~n - 1);< 2334#fibo2ENTRY ~n := #in~n; 2424#L20 assume !(~n < 1); 2421#L22 assume !(1 == ~n); 2316#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2367#L10 assume !(~n < 1); 2366#L12 assume !(1 == ~n); 2272#L15 call #t~ret7 := fibo2(~n - 1);< 2353#fibo2ENTRY ~n := #in~n; 2374#L20 assume !(~n < 1); 2372#L22 assume !(1 == ~n); 2295#L25 call #t~ret9 := fibo1(~n - 1);< 2318#fibo1ENTRY ~n := #in~n; 2375#L10 assume !(~n < 1); 2386#L12 assume 1 == ~n;#res := 1; 2387#fibo1FINAL assume true; 2448#fibo1EXIT >#48#return; 2328#L25-1 call #t~ret10 := fibo1(~n - 2);< 2327#fibo1ENTRY ~n := #in~n; 2329#L10 assume ~n < 1;#res := 0; 2451#fibo1FINAL assume true; 2450#fibo1EXIT >#50#return; 2271#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2274#fibo2FINAL assume true; 2398#fibo2EXIT >#52#return; 2339#L15-1 [2020-11-28 03:06:14,353 INFO L796 eck$LassoCheckResult]: Loop: 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume !(1 == ~n); 2403#L25 call #t~ret9 := fibo1(~n - 1);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#48#return; 2404#L25-1 call #t~ret10 := fibo1(~n - 2);< 2415#fibo1ENTRY ~n := #in~n; 2426#L10 assume !(~n < 1); 2418#L12 assume !(1 == ~n); 2337#L15 call #t~ret7 := fibo2(~n - 1);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume !(~n < 1); 2422#L22 assume 1 == ~n;#res := 1; 2423#fibo2FINAL assume true; 2408#fibo2EXIT >#52#return; 2339#L15-1 call #t~ret8 := fibo2(~n - 2);< 2336#fibo2ENTRY ~n := #in~n; 2340#L20 assume ~n < 1;#res := 0; 2425#fibo2FINAL assume true; 2428#fibo2EXIT >#54#return; 2399#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 2420#fibo1FINAL assume true; 2413#fibo1EXIT >#50#return; 2409#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 2406#fibo2FINAL assume true; 2402#fibo2EXIT >#52#return; 2339#L15-1 [2020-11-28 03:06:14,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:14,353 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-11-28 03:06:14,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:14,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814925523] [2020-11-28 03:06:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:14,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:14,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814925523] [2020-11-28 03:06:14,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968720224] [2020-11-28 03:06:14,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:06:14,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:14,678 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:14,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:14,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-28 03:06:14,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135998033] [2020-11-28 03:06:14,679 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 1 times [2020-11-28 03:06:14,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:14,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013982720] [2020-11-28 03:06:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:14,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:14,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:06:14,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013982720] [2020-11-28 03:06:14,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658110209] [2020-11-28 03:06:14,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:14,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:14,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:06:14,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 03:06:14,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:14,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-11-28 03:06:14,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841135568] [2020-11-28 03:06:14,995 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:14,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:14,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:06:14,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:06:14,996 INFO L87 Difference]: Start difference. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 15 states. [2020-11-28 03:06:15,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:15,398 INFO L93 Difference]: Finished difference Result 206 states and 270 transitions. [2020-11-28 03:06:15,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-28 03:06:15,400 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 206 states and 270 transitions. [2020-11-28 03:06:15,404 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:15,410 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 206 states to 203 states and 266 transitions. [2020-11-28 03:06:15,410 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 133 [2020-11-28 03:06:15,413 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 133 [2020-11-28 03:06:15,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 203 states and 266 transitions. [2020-11-28 03:06:15,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:15,413 INFO L691 BuchiCegarLoop]: Abstraction has 203 states and 266 transitions. [2020-11-28 03:06:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states and 266 transitions. [2020-11-28 03:06:15,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2020-11-28 03:06:15,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-11-28 03:06:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 251 transitions. [2020-11-28 03:06:15,441 INFO L714 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-11-28 03:06:15,441 INFO L594 BuchiCegarLoop]: Abstraction has 194 states and 251 transitions. [2020-11-28 03:06:15,441 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-28 03:06:15,441 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 194 states and 251 transitions. [2020-11-28 03:06:15,444 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-28 03:06:15,444 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:15,444 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:15,451 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:15,456 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2020-11-28 03:06:15,456 INFO L794 eck$LassoCheckResult]: Stem: 3123#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3122#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3080#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3097#fibo1ENTRY ~n := #in~n; 3079#L10 assume !(~n < 1); 3081#L12 assume !(1 == ~n); 3090#L15 call #t~ret7 := fibo2(~n - 1);< 3130#fibo2ENTRY ~n := #in~n; 3133#L20 assume !(~n < 1); 3089#L22 assume !(1 == ~n); 3091#L25 call #t~ret9 := fibo1(~n - 1);< 3115#fibo1ENTRY ~n := #in~n; 3192#L10 assume !(~n < 1); 3191#L12 assume !(1 == ~n); 3095#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3166#L10 assume !(~n < 1); 3165#L12 assume !(1 == ~n); 3094#L15 call #t~ret7 := fibo2(~n - 1);< 3149#fibo2ENTRY ~n := #in~n; 3180#L20 assume !(~n < 1); 3178#L22 assume !(1 == ~n); 3136#L25 call #t~ret9 := fibo1(~n - 1);< 3163#fibo1ENTRY ~n := #in~n; 3168#L10 assume !(~n < 1); 3186#L12 assume 1 == ~n;#res := 1; 3187#fibo1FINAL assume true; 3247#fibo1EXIT >#48#return; 3245#L25-1 call #t~ret10 := fibo1(~n - 2);< 3246#fibo1ENTRY ~n := #in~n; 3249#L10 assume ~n < 1;#res := 0; 3248#fibo1FINAL assume true; 3244#fibo1EXIT >#50#return; 3243#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3242#fibo2FINAL assume true; 3226#fibo2EXIT >#52#return; 3113#L15-1 [2020-11-28 03:06:15,456 INFO L796 eck$LassoCheckResult]: Loop: 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume !(1 == ~n); 3109#L25 call #t~ret9 := fibo1(~n - 1);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#48#return; 3127#L25-1 call #t~ret10 := fibo1(~n - 2);< 3114#fibo1ENTRY ~n := #in~n; 3196#L10 assume !(~n < 1); 3194#L12 assume !(1 == ~n); 3111#L15 call #t~ret7 := fibo2(~n - 1);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume !(~n < 1); 3140#L22 assume 1 == ~n;#res := 1; 3218#fibo2FINAL assume true; 3231#fibo2EXIT >#52#return; 3113#L15-1 call #t~ret8 := fibo2(~n - 2);< 3129#fibo2ENTRY ~n := #in~n; 3138#L20 assume ~n < 1;#res := 0; 3139#fibo2FINAL assume true; 3227#fibo2EXIT >#54#return; 3225#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 3224#fibo1FINAL assume true; 3220#fibo1EXIT >#50#return; 3221#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 3229#fibo2FINAL assume true; 3228#fibo2EXIT >#52#return; 3113#L15-1 [2020-11-28 03:06:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:15,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1100171425, now seen corresponding path program 2 times [2020-11-28 03:06:15,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:15,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433790073] [2020-11-28 03:06:15,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-28 03:06:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-28 03:06:15,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433790073] [2020-11-28 03:06:15,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204097394] [2020-11-28 03:06:15,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:15,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:06:15,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:15,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:06:15,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:15,861 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:06:15,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:15,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2020-11-28 03:06:15,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539063297] [2020-11-28 03:06:15,862 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:15,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:15,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1108085027, now seen corresponding path program 2 times [2020-11-28 03:06:15,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:15,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977711017] [2020-11-28 03:06:15,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-28 03:06:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:15,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:15,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-11-28 03:06:16,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977711017] [2020-11-28 03:06:16,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534857967] [2020-11-28 03:06:16,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:16,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:06:16,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:06:16,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 27 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-28 03:06:16,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:16,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-11-28 03:06:16,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477463263] [2020-11-28 03:06:16,172 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-28 03:06:16,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:16,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-28 03:06:16,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2020-11-28 03:06:16,173 INFO L87 Difference]: Start difference. First operand 194 states and 251 transitions. cyclomatic complexity: 62 Second operand 19 states. [2020-11-28 03:06:16,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:16,930 INFO L93 Difference]: Finished difference Result 246 states and 296 transitions. [2020-11-28 03:06:16,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-28 03:06:16,931 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 246 states and 296 transitions. [2020-11-28 03:06:16,935 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 24 [2020-11-28 03:06:16,940 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 246 states to 163 states and 194 transitions. [2020-11-28 03:06:16,940 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 114 [2020-11-28 03:06:16,941 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 114 [2020-11-28 03:06:16,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 194 transitions. [2020-11-28 03:06:16,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:16,944 INFO L691 BuchiCegarLoop]: Abstraction has 163 states and 194 transitions. [2020-11-28 03:06:16,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 194 transitions. [2020-11-28 03:06:16,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-11-28 03:06:16,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-11-28 03:06:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2020-11-28 03:06:16,957 INFO L714 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-11-28 03:06:16,958 INFO L594 BuchiCegarLoop]: Abstraction has 157 states and 188 transitions. [2020-11-28 03:06:16,958 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-28 03:06:16,958 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 157 states and 188 transitions. [2020-11-28 03:06:16,959 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 22 [2020-11-28 03:06:16,960 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:16,960 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:16,963 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:16,964 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:16,966 INFO L794 eck$LassoCheckResult]: Stem: 4014#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 4010#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 3996#L39 call main_#t~ret11 := fibo1(main_~x~0);< 3997#fibo1ENTRY ~n := #in~n; 4046#L10 assume !(~n < 1); 4007#L12 assume !(1 == ~n); 3990#L15 call #t~ret7 := fibo2(~n - 1);< 4012#fibo2ENTRY ~n := #in~n; 4016#L20 assume !(~n < 1); 3989#L22 assume !(1 == ~n); 3975#L25 call #t~ret9 := fibo1(~n - 1);< 4005#fibo1ENTRY ~n := #in~n; 3974#L10 assume !(~n < 1); 3976#L12 assume !(1 == ~n); 4021#L15 call #t~ret7 := fibo2(~n - 1);< 4032#fibo2ENTRY ~n := #in~n; 4038#L20 assume !(~n < 1); 4034#L22 assume !(1 == ~n); 4018#L25 call #t~ret9 := fibo1(~n - 1);< 4041#fibo1ENTRY ~n := #in~n; 4042#L10 assume !(~n < 1); 4062#L12 assume !(1 == ~n); 4058#L15 call #t~ret7 := fibo2(~n - 1);< 4059#fibo2ENTRY ~n := #in~n; 4064#L20 assume !(~n < 1); 4063#L22 assume 1 == ~n;#res := 1; 4061#fibo2FINAL assume true; 4057#fibo2EXIT >#52#return; 4054#L15-1 call #t~ret8 := fibo2(~n - 2);< 4055#fibo2ENTRY ~n := #in~n; 4060#L20 assume ~n < 1;#res := 0; 4056#fibo2FINAL assume true; 4053#fibo2EXIT >#54#return; 4052#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4048#fibo1FINAL assume true; 4045#fibo1EXIT >#48#return; 3971#L25-1 call #t~ret10 := fibo1(~n - 2);< 4043#fibo1ENTRY ~n := #in~n; 3970#L10 assume ~n < 1;#res := 0; 3972#fibo1FINAL assume true; 4006#fibo1EXIT >#50#return; 4071#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 4119#fibo2FINAL assume true; 4110#fibo2EXIT >#52#return; 3966#L15-1 call #t~ret8 := fibo2(~n - 2);< 4083#fibo2ENTRY [2020-11-28 03:06:16,966 INFO L796 eck$LassoCheckResult]: Loop: 4083#fibo2ENTRY ~n := #in~n; 4084#L20 assume !(~n < 1); 4077#L22 assume !(1 == ~n); 4070#L25 call #t~ret9 := fibo1(~n - 1);< 4075#fibo1ENTRY ~n := #in~n; 4103#L10 assume !(~n < 1); 4101#L12 assume !(1 == ~n); 3965#L15 call #t~ret7 := fibo2(~n - 1);< 4083#fibo2ENTRY [2020-11-28 03:06:16,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:16,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-11-28 03:06:16,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:16,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758188663] [2020-11-28 03:06:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:16,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,167 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 5 proven. 27 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-28 03:06:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758188663] [2020-11-28 03:06:17,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725034748] [2020-11-28 03:06:17,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:17,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-28 03:06:17,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-28 03:06:17,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:17,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 17 [2020-11-28 03:06:17,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124559913] [2020-11-28 03:06:17,352 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:17,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:17,353 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-11-28 03:06:17,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:17,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608833689] [2020-11-28 03:06:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:17,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:17,362 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:17,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:17,365 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:17,477 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:17,477 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:17,477 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:17,477 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:17,477 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:17,477 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,477 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:17,477 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:17,477 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration7_Loop [2020-11-28 03:06:17,477 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:17,477 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:17,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,509 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,587 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:17,587 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:17,596 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:17,596 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:17,638 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:17,638 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,719 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:17,721 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:17,721 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:17,722 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:17,722 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:17,722 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:17,722 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,722 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:17,722 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:17,722 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration7_Loop [2020-11-28 03:06:17,722 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:17,722 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:17,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,739 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,747 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,750 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,753 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:17,830 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:17,830 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:17,836 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,838 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,839 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,840 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,840 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,842 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 44 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 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,871 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,872 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,872 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,872 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,872 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,873 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,873 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,874 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 45 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 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,896 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:17,897 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:17,897 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:17,898 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:17,898 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:17,898 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:17,898 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:17,898 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:17,900 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:17,902 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-28 03:06:17,902 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 46 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 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:17,904 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:17,904 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:17,904 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:17,904 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-11-28 03:06:17,927 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:17,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,108 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,122 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:18,202 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:18,203 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-11-28 03:06:18,419 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-11-28 03:06:18,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:18,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:18,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-11-28 03:06:18,421 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-28 03:06:18,421 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:18,421 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:18,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,545 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:18,624 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:18,624 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-11-28 03:06:18,787 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 225 states and 264 transitions. Complement of second has 16 states. [2020-11-28 03:06:18,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 26 transitions. [2020-11-28 03:06:18,789 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 26 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-28 03:06:18,789 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:18,789 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:18,913 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,916 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:18,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:18,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:19,001 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:19,001 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35 Second operand 7 states. [2020-11-28 03:06:19,233 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 157 states and 188 transitions. cyclomatic complexity: 35. Second operand 7 states. Result 314 states and 366 transitions. Complement of second has 23 states. [2020-11-28 03:06:19,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:19,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-28 03:06:19,237 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-28 03:06:19,237 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:19,238 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-11-28 03:06:19,238 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:19,241 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-11-28 03:06:19,242 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:19,243 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 314 states and 366 transitions. [2020-11-28 03:06:19,248 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 46 [2020-11-28 03:06:19,251 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 314 states to 234 states and 279 transitions. [2020-11-28 03:06:19,252 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 132 [2020-11-28 03:06:19,252 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2020-11-28 03:06:19,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 234 states and 279 transitions. [2020-11-28 03:06:19,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:19,253 INFO L691 BuchiCegarLoop]: Abstraction has 234 states and 279 transitions. [2020-11-28 03:06:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states and 279 transitions. [2020-11-28 03:06:19,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 215. [2020-11-28 03:06:19,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-11-28 03:06:19,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 255 transitions. [2020-11-28 03:06:19,262 INFO L714 BuchiCegarLoop]: Abstraction has 215 states and 255 transitions. [2020-11-28 03:06:19,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:19,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-28 03:06:19,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2020-11-28 03:06:19,263 INFO L87 Difference]: Start difference. First operand 215 states and 255 transitions. Second operand 17 states. [2020-11-28 03:06:19,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:19,706 INFO L93 Difference]: Finished difference Result 220 states and 258 transitions. [2020-11-28 03:06:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:06:19,707 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 220 states and 258 transitions. [2020-11-28 03:06:19,710 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-11-28 03:06:19,713 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 220 states to 218 states and 256 transitions. [2020-11-28 03:06:19,713 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-28 03:06:19,713 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-28 03:06:19,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 218 states and 256 transitions. [2020-11-28 03:06:19,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:19,714 INFO L691 BuchiCegarLoop]: Abstraction has 218 states and 256 transitions. [2020-11-28 03:06:19,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states and 256 transitions. [2020-11-28 03:06:19,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2020-11-28 03:06:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-28 03:06:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 248 transitions. [2020-11-28 03:06:19,724 INFO L714 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-11-28 03:06:19,725 INFO L594 BuchiCegarLoop]: Abstraction has 210 states and 248 transitions. [2020-11-28 03:06:19,725 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-28 03:06:19,725 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 210 states and 248 transitions. [2020-11-28 03:06:19,727 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 40 [2020-11-28 03:06:19,727 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:19,727 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:19,728 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:19,728 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:19,729 INFO L794 eck$LassoCheckResult]: Stem: 6182#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 6181#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 6152#L39 call main_#t~ret11 := fibo1(main_~x~0);< 6153#fibo1ENTRY ~n := #in~n; 6262#L10 assume !(~n < 1); 6261#L12 assume !(1 == ~n); 6257#L15 call #t~ret7 := fibo2(~n - 1);< 6260#fibo2ENTRY ~n := #in~n; 6259#L20 assume !(~n < 1); 6258#L22 assume !(1 == ~n); 6250#L25 call #t~ret9 := fibo1(~n - 1);< 6256#fibo1ENTRY ~n := #in~n; 6254#L10 assume !(~n < 1); 6252#L12 assume !(1 == ~n); 6129#L15 call #t~ret7 := fibo2(~n - 1);< 6209#fibo2ENTRY ~n := #in~n; 6248#L20 assume !(~n < 1); 6243#L22 assume !(1 == ~n); 6196#L25 call #t~ret9 := fibo1(~n - 1);< 6220#fibo1ENTRY ~n := #in~n; 6236#L10 assume !(~n < 1); 6235#L12 assume !(1 == ~n); 6232#L15 call #t~ret7 := fibo2(~n - 1);< 6233#fibo2ENTRY ~n := #in~n; 6240#L20 assume !(~n < 1); 6239#L22 assume 1 == ~n;#res := 1; 6238#fibo2FINAL assume true; 6231#fibo2EXIT >#52#return; 6228#L15-1 call #t~ret8 := fibo2(~n - 2);< 6229#fibo2ENTRY ~n := #in~n; 6234#L20 assume ~n < 1;#res := 0; 6230#fibo2FINAL assume true; 6227#fibo2EXIT >#54#return; 6226#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 6225#fibo1FINAL assume true; 6219#fibo1EXIT >#48#return; 6211#L25-1 call #t~ret10 := fibo1(~n - 2);< 6180#fibo1ENTRY ~n := #in~n; 6215#L10 assume !(~n < 1); 6213#L12 assume !(1 == ~n); 6166#L15 call #t~ret7 := fibo2(~n - 1);< 6210#fibo2ENTRY ~n := #in~n; 6207#L20 assume !(~n < 1); 6203#L22 assume 1 == ~n;#res := 1; 6204#fibo2FINAL assume true; 6291#fibo2EXIT >#52#return; 6141#L15-1 [2020-11-28 03:06:19,729 INFO L796 eck$LassoCheckResult]: Loop: 6141#L15-1 call #t~ret8 := fibo2(~n - 2);< 6284#fibo2ENTRY ~n := #in~n; 6286#L20 assume !(~n < 1); 6279#L22 assume !(1 == ~n); 6138#L25 call #t~ret9 := fibo1(~n - 1);< 6184#fibo1ENTRY ~n := #in~n; 6137#L10 assume !(~n < 1); 6139#L12 assume !(1 == ~n); 6270#L15 call #t~ret7 := fibo2(~n - 1);< 6186#fibo2ENTRY ~n := #in~n; 6293#L20 assume !(~n < 1); 6302#L22 assume 1 == ~n;#res := 1; 6301#fibo2FINAL assume true; 6290#fibo2EXIT >#52#return; 6141#L15-1 [2020-11-28 03:06:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:19,730 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-11-28 03:06:19,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:19,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834795814] [2020-11-28 03:06:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-28 03:06:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-28 03:06:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-11-28 03:06:19,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834795814] [2020-11-28 03:06:19,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733699460] [2020-11-28 03:06:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 03:06:19,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-28 03:06:20,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:20,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-11-28 03:06:20,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388847884] [2020-11-28 03:06:20,027 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:20,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:20,027 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-11-28 03:06:20,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:20,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90496969] [2020-11-28 03:06:20,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:20,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:20,035 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:20,037 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:20,040 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:20,289 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:20,289 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:20,289 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:20,289 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:20,289 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:20,289 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,289 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:20,289 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:20,289 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration8_Loop [2020-11-28 03:06:20,289 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:20,289 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:20,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,301 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,303 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,306 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,313 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,324 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:20,388 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:20,388 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 48 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 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,390 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,390 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,393 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,393 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret8=0} Honda state: {fibo1_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 49 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 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,418 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,418 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,420 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,420 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#res=0} Honda state: {fibo2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 50 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,444 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,444 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,457 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,457 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_~n=0} Honda state: {fibo2_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 51 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 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,485 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,485 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 52 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 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,509 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,510 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,515 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,515 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret10=0} Honda state: {fibo2_#t~ret10=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 53 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 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,540 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,540 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:20,543 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:20,543 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 54 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 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,569 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:20,569 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 55 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 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:20,595 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:20,596 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:21,680 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:21,682 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:21,682 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:21,682 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:21,682 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:21,682 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:21,682 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,682 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:21,682 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:21,682 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration8_Loop [2020-11-28 03:06:21,682 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:21,682 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:21,683 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,688 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,691 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:21,765 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:21,765 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 56 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 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,771 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,772 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,772 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,773 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,773 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,773 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,773 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,773 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,774 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 57 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 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,796 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,798 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,798 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,798 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,798 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,798 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,799 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,799 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,800 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 58 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 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,822 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,824 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,824 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,824 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,824 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,824 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,824 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,824 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,826 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 59 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,851 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,852 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,852 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,852 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,852 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,852 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,853 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,853 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,855 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 60 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 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,892 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,894 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,894 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,894 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,894 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,894 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,894 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,895 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,896 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 61 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 61 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,918 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,919 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,920 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,920 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,920 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,920 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,920 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,921 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,922 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 62 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 62 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,948 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,949 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,949 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,949 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,949 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,949 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,950 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,950 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,951 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 63 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 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:21,974 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:21,975 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:21,975 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:21,975 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:21,975 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:21,976 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:21,977 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:21,977 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:21,991 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:21,998 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:21,999 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:22,002 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:22,002 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:22,002 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:22,002 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:22,037 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:22,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:22,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:22,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:22,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:22,128 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:22,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:22,280 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:22,281 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-11-28 03:06:22,776 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 608 states and 688 transitions. Complement of second has 40 states. [2020-11-28 03:06:22,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:22,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 54 transitions. [2020-11-28 03:06:22,780 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:06:22,780 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:22,780 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:22,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:22,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:22,905 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:22,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:22,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:22,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:23,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:23,058 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:23,058 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-11-28 03:06:23,344 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 260 states and 302 transitions. Complement of second has 26 states. [2020-11-28 03:06:23,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:23,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 31 transitions. [2020-11-28 03:06:23,349 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 31 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:06:23,350 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:23,350 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-28 03:06:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:23,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:23,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:23,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:23,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-28 03:06:23,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:23,674 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:23,674 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 8 loop predicates [2020-11-28 03:06:23,675 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43 Second operand 10 states. [2020-11-28 03:06:24,099 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 210 states and 248 transitions. cyclomatic complexity: 43. Second operand 10 states. Result 1187 states and 1346 transitions. Complement of second has 102 states. [2020-11-28 03:06:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 2 stem states 9 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-28 03:06:24,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 71 transitions. [2020-11-28 03:06:24,102 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-28 03:06:24,103 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:24,103 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 60 letters. Loop has 14 letters. [2020-11-28 03:06:24,104 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:24,104 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 71 transitions. Stem has 46 letters. Loop has 28 letters. [2020-11-28 03:06:24,106 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:24,106 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1187 states and 1346 transitions. [2020-11-28 03:06:24,122 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 124 [2020-11-28 03:06:24,131 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1187 states to 613 states and 697 transitions. [2020-11-28 03:06:24,131 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 287 [2020-11-28 03:06:24,132 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 313 [2020-11-28 03:06:24,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 613 states and 697 transitions. [2020-11-28 03:06:24,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:24,133 INFO L691 BuchiCegarLoop]: Abstraction has 613 states and 697 transitions. [2020-11-28 03:06:24,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states and 697 transitions. [2020-11-28 03:06:24,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 547. [2020-11-28 03:06:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-11-28 03:06:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 618 transitions. [2020-11-28 03:06:24,154 INFO L714 BuchiCegarLoop]: Abstraction has 547 states and 618 transitions. [2020-11-28 03:06:24,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:24,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-28 03:06:24,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-11-28 03:06:24,155 INFO L87 Difference]: Start difference. First operand 547 states and 618 transitions. Second operand 16 states. [2020-11-28 03:06:24,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:24,535 INFO L93 Difference]: Finished difference Result 373 states and 416 transitions. [2020-11-28 03:06:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-28 03:06:24,535 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 373 states and 416 transitions. [2020-11-28 03:06:24,540 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:06:24,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 373 states to 258 states and 292 transitions. [2020-11-28 03:06:24,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 149 [2020-11-28 03:06:24,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 165 [2020-11-28 03:06:24,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 258 states and 292 transitions. [2020-11-28 03:06:24,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:24,545 INFO L691 BuchiCegarLoop]: Abstraction has 258 states and 292 transitions. [2020-11-28 03:06:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states and 292 transitions. [2020-11-28 03:06:24,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-11-28 03:06:24,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-11-28 03:06:24,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 286 transitions. [2020-11-28 03:06:24,554 INFO L714 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-11-28 03:06:24,554 INFO L594 BuchiCegarLoop]: Abstraction has 255 states and 286 transitions. [2020-11-28 03:06:24,554 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-28 03:06:24,555 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 286 transitions. [2020-11-28 03:06:24,557 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2020-11-28 03:06:24,557 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:24,557 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:24,558 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:24,558 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:24,559 INFO L794 eck$LassoCheckResult]: Stem: 10359#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 10358#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 10333#L39 call main_#t~ret11 := fibo1(main_~x~0);< 10334#fibo1ENTRY ~n := #in~n; 10462#L10 assume !(~n < 1); 10461#L12 assume !(1 == ~n); 10443#L15 call #t~ret7 := fibo2(~n - 1);< 10460#fibo2ENTRY ~n := #in~n; 10459#L20 assume !(~n < 1); 10458#L22 assume !(1 == ~n); 10454#L25 call #t~ret9 := fibo1(~n - 1);< 10457#fibo1ENTRY ~n := #in~n; 10456#L10 assume !(~n < 1); 10455#L12 assume !(1 == ~n); 10450#L15 call #t~ret7 := fibo2(~n - 1);< 10453#fibo2ENTRY ~n := #in~n; 10452#L20 assume !(~n < 1); 10451#L22 assume !(1 == ~n); 10362#L25 call #t~ret9 := fibo1(~n - 1);< 10449#fibo1ENTRY ~n := #in~n; 10448#L10 assume !(~n < 1); 10447#L12 assume !(1 == ~n); 10361#L15 call #t~ret7 := fibo2(~n - 1);< 10363#fibo2ENTRY ~n := #in~n; 10470#L20 assume !(~n < 1); 10469#L22 assume 1 == ~n;#res := 1; 10465#fibo2FINAL assume true; 10463#fibo2EXIT >#52#return; 10464#L15-1 call #t~ret8 := fibo2(~n - 2);< 10497#fibo2ENTRY ~n := #in~n; 10514#L20 assume ~n < 1;#res := 0; 10513#fibo2FINAL assume true; 10496#fibo2EXIT >#54#return; 10495#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 10493#fibo1FINAL assume true; 10490#fibo1EXIT >#48#return; 10486#L25-1 call #t~ret10 := fibo1(~n - 2);< 10487#fibo1ENTRY ~n := #in~n; 10494#L10 assume !(~n < 1); 10492#L12 assume 1 == ~n;#res := 1; 10489#fibo1FINAL assume true; 10485#fibo1EXIT >#50#return; 10483#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 10482#fibo2FINAL assume true; 10481#fibo2EXIT >#52#return; 10419#L15-1 call #t~ret8 := fibo2(~n - 2);< 10477#fibo2ENTRY ~n := #in~n; 10519#L20 assume ~n < 1;#res := 0; 10520#fibo2FINAL assume true; 10547#fibo2EXIT >#54#return; 10476#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 10478#fibo1FINAL assume true; 10472#fibo1EXIT >#48#return; 10445#L25-1 call #t~ret10 := fibo1(~n - 2);< 10350#fibo1ENTRY ~n := #in~n; 10506#L10 assume !(~n < 1); 10504#L12 assume !(1 == ~n); 10444#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-11-28 03:06:24,559 INFO L796 eck$LassoCheckResult]: Loop: 10446#fibo2ENTRY ~n := #in~n; 10510#L20 assume !(~n < 1); 10508#L22 assume !(1 == ~n); 10336#L25 call #t~ret9 := fibo1(~n - 1);< 10507#fibo1ENTRY ~n := #in~n; 10505#L10 assume !(~n < 1); 10502#L12 assume !(1 == ~n); 10475#L15 call #t~ret7 := fibo2(~n - 1);< 10446#fibo2ENTRY [2020-11-28 03:06:24,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:24,559 INFO L82 PathProgramCache]: Analyzing trace with hash -246198455, now seen corresponding path program 2 times [2020-11-28 03:06:24,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:24,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057826317] [2020-11-28 03:06:24,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:24,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-28 03:06:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-11-28 03:06:24,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-11-28 03:06:24,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057826317] [2020-11-28 03:06:24,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249994242] [2020-11-28 03:06:24,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:24,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:06:24,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-28 03:06:24,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-11-28 03:06:24,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:24,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2020-11-28 03:06:24,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420107272] [2020-11-28 03:06:24,925 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:24,926 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 3 times [2020-11-28 03:06:24,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:24,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603256833] [2020-11-28 03:06:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:24,931 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:24,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:24,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:24,935 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:25,052 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:25,052 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:25,052 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:25,052 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:25,052 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:25,052 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,052 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:25,053 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:25,053 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration9_Loop [2020-11-28 03:06:25,053 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:25,053 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:25,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,057 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,177 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:25,177 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:25,182 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,186 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:25,186 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=0} Honda state: {fibo1_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,224 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:25,224 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,228 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:25,228 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_~n=0} Honda state: {fibo1_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:25,267 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,271 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:25,271 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#res=0} Honda state: {fibo1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,308 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:25,309 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,312 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:25,313 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#in~n=0} Honda state: {fibo1_#in~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 70 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 70 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,338 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:25,338 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:25,340 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-28 03:06:25,340 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo2_#t~ret9=0} Honda state: {fibo2_#t~ret9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 71 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 71 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,362 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:25,362 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,387 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:25,387 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,413 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:25,415 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:25,415 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:25,415 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:25,415 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:25,415 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:25,415 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,415 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:25,415 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:25,415 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration9_Loop [2020-11-28 03:06:25,415 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:25,415 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:25,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,428 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,431 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,434 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,437 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,447 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:25,513 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:25,513 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 73 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 73 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,516 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,517 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,517 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,517 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,517 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,517 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,518 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,518 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,519 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 74 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 74 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,541 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,543 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,543 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,543 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,543 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,543 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,544 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,544 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,545 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 75 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 75 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,566 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,567 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,567 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,568 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,568 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,568 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,568 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,568 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,569 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 76 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 76 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,591 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,592 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,592 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,592 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,592 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,593 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,593 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,594 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 77 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 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,615 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,617 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,617 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,617 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,617 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,617 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,617 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,618 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 78 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 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,640 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,641 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,642 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,642 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,643 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,643 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,656 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 79 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 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,695 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,696 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,697 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,697 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,697 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,697 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,697 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,697 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:25,708 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,747 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:25,748 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:25,749 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:25,749 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:25,749 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:25,749 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:25,751 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:25,751 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,754 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:25,758 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:25,759 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_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-28 03:06:25,764 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:25,764 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:25,764 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:25,764 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:25,785 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:25,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:06:25,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:25,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:25,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:25,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:25,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:25,892 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:25,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:25,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:26,007 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:26,007 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-11-28 03:06:26,148 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-11-28 03:06:26,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:26,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-11-28 03:06:26,154 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-11-28 03:06:26,154 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:26,154 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:26,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:26,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,312 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,317 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,319 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,321 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:26,398 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:26,398 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-11-28 03:06:26,506 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 273 states and 304 transitions. Complement of second has 15 states. [2020-11-28 03:06:26,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 7 states 2 stem states 4 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:26,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:26,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 17 transitions. [2020-11-28 03:06:26,508 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 17 transitions. Stem has 58 letters. Loop has 8 letters. [2020-11-28 03:06:26,508 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:26,509 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,672 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,676 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,677 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,679 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:26,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:26,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:26,760 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 5 loop predicates [2020-11-28 03:06:26,760 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34 Second operand 7 states. [2020-11-28 03:06:27,016 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 286 transitions. cyclomatic complexity: 34. Second operand 7 states. Result 393 states and 429 transitions. Complement of second has 25 states. [2020-11-28 03:06:27,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:27,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-28 03:06:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 42 transitions. [2020-11-28 03:06:27,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 8 letters. [2020-11-28 03:06:27,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 66 letters. Loop has 8 letters. [2020-11-28 03:06:27,019 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,019 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 42 transitions. Stem has 58 letters. Loop has 16 letters. [2020-11-28 03:06:27,020 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:27,020 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 393 states and 429 transitions. [2020-11-28 03:06:27,024 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2020-11-28 03:06:27,027 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 393 states to 277 states and 306 transitions. [2020-11-28 03:06:27,027 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2020-11-28 03:06:27,028 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 170 [2020-11-28 03:06:27,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 277 states and 306 transitions. [2020-11-28 03:06:27,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:27,028 INFO L691 BuchiCegarLoop]: Abstraction has 277 states and 306 transitions. [2020-11-28 03:06:27,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states and 306 transitions. [2020-11-28 03:06:27,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 263. [2020-11-28 03:06:27,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-11-28 03:06:27,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 292 transitions. [2020-11-28 03:06:27,037 INFO L714 BuchiCegarLoop]: Abstraction has 263 states and 292 transitions. [2020-11-28 03:06:27,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:27,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-28 03:06:27,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-11-28 03:06:27,038 INFO L87 Difference]: Start difference. First operand 263 states and 292 transitions. Second operand 15 states. [2020-11-28 03:06:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:27,363 INFO L93 Difference]: Finished difference Result 272 states and 304 transitions. [2020-11-28 03:06:27,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-28 03:06:27,364 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 304 transitions. [2020-11-28 03:06:27,367 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-11-28 03:06:27,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 269 states and 301 transitions. [2020-11-28 03:06:27,370 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 164 [2020-11-28 03:06:27,370 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 164 [2020-11-28 03:06:27,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 269 states and 301 transitions. [2020-11-28 03:06:27,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-28 03:06:27,371 INFO L691 BuchiCegarLoop]: Abstraction has 269 states and 301 transitions. [2020-11-28 03:06:27,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states and 301 transitions. [2020-11-28 03:06:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 264. [2020-11-28 03:06:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-28 03:06:27,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 292 transitions. [2020-11-28 03:06:27,379 INFO L714 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-11-28 03:06:27,379 INFO L594 BuchiCegarLoop]: Abstraction has 264 states and 292 transitions. [2020-11-28 03:06:27,379 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-28 03:06:27,379 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 264 states and 292 transitions. [2020-11-28 03:06:27,382 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-11-28 03:06:27,382 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-28 03:06:27,382 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-28 03:06:27,383 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:27,383 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:06:27,383 INFO L794 eck$LassoCheckResult]: Stem: 13105#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 13097#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 6; 13071#L39 call main_#t~ret11 := fibo1(main_~x~0);< 13072#fibo1ENTRY ~n := #in~n; 13226#L10 assume !(~n < 1); 13224#L12 assume !(1 == ~n); 13216#L15 call #t~ret7 := fibo2(~n - 1);< 13219#fibo2ENTRY ~n := #in~n; 13218#L20 assume !(~n < 1); 13217#L22 assume !(1 == ~n); 13212#L25 call #t~ret9 := fibo1(~n - 1);< 13215#fibo1ENTRY ~n := #in~n; 13214#L10 assume !(~n < 1); 13213#L12 assume !(1 == ~n); 13041#L15 call #t~ret7 := fibo2(~n - 1);< 13207#fibo2ENTRY ~n := #in~n; 13202#L20 assume !(~n < 1); 13200#L22 assume !(1 == ~n); 13192#L25 call #t~ret9 := fibo1(~n - 1);< 13199#fibo1ENTRY ~n := #in~n; 13197#L10 assume !(~n < 1); 13195#L12 assume !(1 == ~n); 13189#L15 call #t~ret7 := fibo2(~n - 1);< 13193#fibo2ENTRY ~n := #in~n; 13198#L20 assume !(~n < 1); 13196#L22 assume 1 == ~n;#res := 1; 13194#fibo2FINAL assume true; 13188#fibo2EXIT >#52#return; 13190#L15-1 call #t~ret8 := fibo2(~n - 2);< 13278#fibo2ENTRY ~n := #in~n; 13280#L20 assume ~n < 1;#res := 0; 13279#fibo2FINAL assume true; 13277#fibo2EXIT >#54#return; 13275#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 13273#fibo1FINAL assume true; 13272#fibo1EXIT >#48#return; 13089#L25-1 call #t~ret10 := fibo1(~n - 2);< 13090#fibo1ENTRY ~n := #in~n; 13284#L10 assume !(~n < 1); 13283#L12 assume 1 == ~n;#res := 1; 13271#fibo1FINAL assume true; 13269#fibo1EXIT >#50#return; 13040#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret9;havoc #t~ret10; 13042#fibo2FINAL assume true; 13255#fibo2EXIT >#52#return; 13084#L15-1 call #t~ret8 := fibo2(~n - 2);< 13156#fibo2ENTRY ~n := #in~n; 13158#L20 assume !(~n < 1); 13152#L22 assume !(1 == ~n); 13144#L25 call #t~ret9 := fibo1(~n - 1);< 13151#fibo1ENTRY ~n := #in~n; 13150#L10 assume !(~n < 1); 13143#L12 assume !(1 == ~n); 13064#L15 call #t~ret7 := fibo2(~n - 1);< 13185#fibo2ENTRY ~n := #in~n; 13187#L20 assume !(~n < 1); 13062#L22 assume !(1 == ~n); 13065#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-11-28 03:06:27,384 INFO L796 eck$LassoCheckResult]: Loop: 13175#L15 call #t~ret7 := fibo2(~n - 1);< 13176#fibo2ENTRY ~n := #in~n; 13183#L20 assume !(~n < 1); 13184#L22 assume !(1 == ~n); 13172#L25 call #t~ret9 := fibo1(~n - 1);< 13182#fibo1ENTRY ~n := #in~n; 13180#L10 assume !(~n < 1); 13178#L12 assume !(1 == ~n); 13175#L15 [2020-11-28 03:06:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1632318521, now seen corresponding path program 3 times [2020-11-28 03:06:27,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:27,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218734453] [2020-11-28 03:06:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-28 03:06:27,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:27,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-28 03:06:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-28 03:06:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-28 03:06:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:06:27,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218734453] [2020-11-28 03:06:27,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941377820] [2020-11-28 03:06:27,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:06:27,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-28 03:06:27,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:06:27,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-28 03:06:27,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 65 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-28 03:06:27,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:06:27,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 18 [2020-11-28 03:06:27,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412244406] [2020-11-28 03:06:27,725 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-28 03:06:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-11-28 03:06:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:06:27,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54773835] [2020-11-28 03:06:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:06:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:27,730 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:06:27,732 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:06:27,733 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:06:27,869 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:27,869 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:27,869 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:27,869 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:27,869 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-28 03:06:27,869 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:27,869 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:27,869 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:27,870 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration10_Loop [2020-11-28 03:06:27,870 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:27,870 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:27,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,882 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,885 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,909 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,914 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:27,991 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:27,991 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 83 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 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:27,996 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-28 03:06:27,996 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 84 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 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:28,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-28 03:06:28,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-28 03:06:30,363 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-28 03:06:30,365 INFO L210 LassoAnalysis]: Preferences: [2020-11-28 03:06:30,365 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-28 03:06:30,365 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-28 03:06:30,365 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-28 03:06:30,365 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-28 03:06:30,365 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:30,365 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-28 03:06:30,365 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-28 03:06:30,365 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_6-2.c_Iteration10_Loop [2020-11-28 03:06:30,365 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-28 03:06:30,365 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-28 03:06:30,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,384 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-28 03:06:30,469 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-28 03:06:30,469 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 85 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 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:30,479 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-28 03:06:30,480 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-28 03:06:30,481 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-28 03:06:30,481 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-28 03:06:30,481 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-28 03:06:30,481 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-28 03:06:30,482 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-28 03:06:30,482 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-28 03:06:30,484 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-28 03:06:30,487 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-28 03:06:30,487 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_5ebabf57-9077-456a-ae05-ca49c32a29aa/bin/uautomizer/z3 Starting monitored process 86 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 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-28 03:06:30,500 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-28 03:06:30,500 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-28 03:06:30,500 INFO L510 LassoAnalysis]: Proved termination. [2020-11-28 03:06:30,500 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-28 03:06:30,520 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-28 03:06:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:30,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:06:30,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:30,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:30,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:30,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:30,653 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:30,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:30,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:30,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:30,769 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-28 03:06:30,769 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-11-28 03:06:30,921 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 19 states. [2020-11-28 03:06:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:30,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:06:30,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-11-28 03:06:30,922 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-28 03:06:30,922 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:30,922 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:30,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:31,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:06:31,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:31,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,059 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,061 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:31,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:31,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:31,165 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-28 03:06:31,165 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-11-28 03:06:31,344 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 288 states and 316 transitions. Complement of second has 21 states. [2020-11-28 03:06:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:31,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:06:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-11-28 03:06:31,345 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-28 03:06:31,346 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:31,346 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-28 03:06:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:06:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:31,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-28 03:06:31,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:31,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,541 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,543 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-28 03:06:31,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:06:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 03:06:31,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:06:31,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:06:31,637 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 6 loop predicates [2020-11-28 03:06:31,638 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31 Second operand 8 states. [2020-11-28 03:06:31,844 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 264 states and 292 transitions. cyclomatic complexity: 31. Second operand 8 states. Result 606 states and 695 transitions. Complement of second has 33 states. [2020-11-28 03:06:31,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-28 03:06:31,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-28 03:06:31,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-28 03:06:31,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 8 letters. [2020-11-28 03:06:31,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:31,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-28 03:06:31,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:31,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 61 letters. Loop has 16 letters. [2020-11-28 03:06:31,850 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-28 03:06:31,850 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 606 states and 695 transitions. [2020-11-28 03:06:31,858 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:06:31,858 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 606 states to 0 states and 0 transitions. [2020-11-28 03:06:31,858 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:06:31,859 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:06:31,859 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:06:31,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:06:31,859 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:31,859 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:31,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:06:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-28 03:06:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-11-28 03:06:31,860 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 18 states. [2020-11-28 03:06:31,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:06:31,862 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-28 03:06:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:06:31,862 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-28 03:06:31,862 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:06:31,863 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-28 03:06:31,863 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-28 03:06:31,863 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-28 03:06:31,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-28 03:06:31,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-28 03:06:31,863 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:31,863 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:31,863 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-28 03:06:31,864 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-28 03:06:31,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-28 03:06:31,864 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-28 03:06:31,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-28 03:06:31,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.11 03:06:31 BoogieIcfgContainer [2020-11-28 03:06:31,871 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-28 03:06:31,871 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:06:31,871 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:06:31,871 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:06:31,872 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:06:06" (3/4) ... [2020-11-28 03:06:31,875 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 03:06:31,875 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:06:31,876 INFO L168 Benchmark]: Toolchain (without parser) took 25909.86 ms. Allocated memory was 102.8 MB in the beginning and 297.8 MB in the end (delta: 195.0 MB). Free memory was 76.4 MB in the beginning and 213.8 MB in the end (delta: -137.4 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:31,877 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 102.8 MB. Free memory was 60.8 MB in the beginning and 60.7 MB in the end (delta: 47.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:31,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.23 ms. Allocated memory is still 102.8 MB. Free memory was 76.1 MB in the beginning and 80.6 MB in the end (delta: -4.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:31,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.98 ms. Allocated memory is still 102.8 MB. Free memory was 80.6 MB in the beginning and 79.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:31,878 INFO L168 Benchmark]: Boogie Preprocessor took 31.14 ms. Allocated memory is still 102.8 MB. Free memory was 79.4 MB in the beginning and 78.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:31,879 INFO L168 Benchmark]: RCFGBuilder took 541.90 ms. Allocated memory is still 102.8 MB. Free memory was 78.2 MB in the beginning and 65.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:31,879 INFO L168 Benchmark]: BuchiAutomizer took 24964.71 ms. Allocated memory was 102.8 MB in the beginning and 297.8 MB in the end (delta: 195.0 MB). Free memory was 65.9 MB in the beginning and 213.8 MB in the end (delta: -147.9 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2020-11-28 03:06:31,879 INFO L168 Benchmark]: Witness Printer took 3.87 ms. Allocated memory is still 297.8 MB. Free memory is still 213.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:06:31,884 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 102.8 MB. Free memory was 60.8 MB in the beginning and 60.7 MB in the end (delta: 47.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 327.23 ms. Allocated memory is still 102.8 MB. Free memory was 76.1 MB in the beginning and 80.6 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 33.98 ms. Allocated memory is still 102.8 MB. Free memory was 80.6 MB in the beginning and 79.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.14 ms. Allocated memory is still 102.8 MB. Free memory was 79.4 MB in the beginning and 78.2 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 541.90 ms. Allocated memory is still 102.8 MB. Free memory was 78.2 MB in the beginning and 65.9 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 24964.71 ms. Allocated memory was 102.8 MB in the beginning and 297.8 MB in the end (delta: 195.0 MB). Free memory was 65.9 MB in the beginning and 213.8 MB in the end (delta: -147.9 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.87 ms. Allocated memory is still 297.8 MB. Free memory is still 213.8 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 15 terminating modules (9 trivial, 2 deterministic, 4 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 7 locations. One deterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 12 locations. One nondeterministic module has affine ranking function \old(n) and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 9 modules have a trivial ranking function, the largest among these consists of 19 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 24.9s and 11 iterations. TraceHistogramMax:8. Analysis of lassos took 13.9s. Construction of modules took 2.8s. Büchi inclusion checks took 7.4s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 13. Automata minimization 0.2s AutomataMinimizationTime, 13 MinimizatonAttempts, 191 StatesRemovedByMinimization, 13 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 264 states and ocurred in iteration 9. Nontrivial modules had stage [2, 0, 4, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/6 HoareTripleCheckerStatistics: 437 SDtfs, 1089 SDslu, 1194 SDs, 0 SdLazy, 2786 SolverSat, 572 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI4 SILT5 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax100 hnf79 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq186 hnf93 smp75 dnf100 smp100 tf110 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 4.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...