./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 fe4c237d03da6bf7a86f5cd898d20e467d10d950 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:31:46,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:31:46,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:31:46,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:31:46,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:31:46,653 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:31:46,658 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:31:46,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:31:46,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:31:46,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:31:46,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:31:46,683 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:31:46,683 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:31:46,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:31:46,689 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:31:46,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:31:46,694 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:31:46,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:31:46,702 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:31:46,712 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:31:46,715 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:31:46,717 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:31:46,721 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:31:46,723 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:31:46,734 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:31:46,735 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:31:46,735 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:31:46,738 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:31:46,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:31:46,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:31:46,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:31:46,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:31:46,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:31:46,748 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:31:46,749 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:31:46,750 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:31:46,751 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:31:46,751 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:31:46,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:31:46,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:31:46,756 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:31:46,759 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 18:31:46,800 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:31:46,800 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:31:46,802 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:31:46,803 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:31:46,803 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:31:46,803 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 18:31:46,804 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 18:31:46,804 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 18:31:46,804 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 18:31:46,804 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 18:31:46,805 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 18:31:46,805 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:31:46,805 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 18:31:46,806 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:31:46,806 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:31:46,806 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 18:31:46,806 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:31:46,807 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 18:31:46,807 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 18:31:46,807 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 18:31:46,807 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 18:31:46,808 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:31:46,808 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 18:31:46,808 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:31:46,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 18:31:46,809 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:31:46,809 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:31:46,810 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 18:31:46,810 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:31:46,810 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:31:46,810 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:31:46,811 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 18:31:46,812 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 18:31:46,812 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fe4c237d03da6bf7a86f5cd898d20e467d10d950 [2020-11-29 18:31:47,115 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:31:47,172 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:31:47,175 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:31:47,177 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:31:47,178 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:31:47,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2020-11-29 18:31:47,304 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/data/5288b54cd/5ea478ba814b494595343a491c2d62dc/FLAG3ce8eb1c9 [2020-11-29 18:31:47,861 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:31:47,862 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2020-11-29 18:31:47,879 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/data/5288b54cd/5ea478ba814b494595343a491c2d62dc/FLAG3ce8eb1c9 [2020-11-29 18:31:48,239 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/data/5288b54cd/5ea478ba814b494595343a491c2d62dc [2020-11-29 18:31:48,243 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:31:48,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:31:48,253 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:31:48,254 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:31:48,258 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:31:48,260 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3859210 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48, skipping insertion in model container [2020-11-29 18:31:48,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,278 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:31:48,301 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:31:48,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:31:48,576 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:31:48,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:31:48,615 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:31:48,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48 WrapperNode [2020-11-29 18:31:48,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:31:48,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:31:48,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:31:48,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:31:48,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,636 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,654 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:31:48,655 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:31:48,655 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:31:48,656 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:31:48,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,672 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,674 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... [2020-11-29 18:31:48,676 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:31:48,677 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:31:48,677 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:31:48,677 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:31:48,692 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:48,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 18:31:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-29 18:31:48,775 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-29 18:31:48,775 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 18:31:48,776 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-29 18:31:48,776 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-29 18:31:48,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:31:48,777 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:31:49,351 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:31:49,354 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 18:31:49,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:49 BoogieIcfgContainer [2020-11-29 18:31:49,357 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:31:49,359 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 18:31:49,359 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 18:31:49,363 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 18:31:49,364 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:31:49,364 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 06:31:48" (1/3) ... [2020-11-29 18:31:49,366 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@106b6682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:31:49, skipping insertion in model container [2020-11-29 18:31:49,366 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:31:49,367 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:31:48" (2/3) ... [2020-11-29 18:31:49,367 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@106b6682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:31:49, skipping insertion in model container [2020-11-29 18:31:49,367 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:31:49,368 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:49" (3/3) ... [2020-11-29 18:31:49,370 INFO L373 chiAutomizerObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-11-29 18:31:49,448 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 18:31:49,448 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 18:31:49,448 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 18:31:49,448 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:31:49,449 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:31:49,449 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 18:31:49,449 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:31:49,449 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 18:31:49,470 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-29 18:31:49,507 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 18:31:49,508 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:31:49,508 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:31:49,516 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:31:49,517 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:49,517 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 18:31:49,517 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states. [2020-11-29 18:31:49,523 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 18:31:49,523 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:31:49,523 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:31:49,525 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:31:49,525 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:49,533 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 := 8; 22#L39true call main_#t~ret11 := fibo1(main_~x~0);< 27#fibo1ENTRYtrue [2020-11-29 18:31:49,535 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 [2020-11-29 18:31:49,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:49,546 INFO L82 PathProgramCache]: Analyzing trace with hash 29898, now seen corresponding path program 1 times [2020-11-29 18:31:49,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:49,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53919560] [2020-11-29 18:31:49,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:49,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:49,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:49,778 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:31:49,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:49,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1206117480, now seen corresponding path program 1 times [2020-11-29 18:31:49,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:49,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048295981] [2020-11-29 18:31:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:49,805 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:49,830 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:49,833 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:31:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:49,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1276411855, now seen corresponding path program 1 times [2020-11-29 18:31:49,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:49,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102963223] [2020-11-29 18:31:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:49,859 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:49,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:49,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:49,890 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:31:50,206 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:31:50,206 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:31:50,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:31:50,207 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:31:50,208 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:31:50,208 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:50,208 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:31:50,209 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:31:50,209 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration1_Loop [2020-11-29 18:31:50,210 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:31:50,210 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:31:50,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,268 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,272 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,305 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:50,442 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:31:50,444 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:50,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,461 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:50,468 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,470 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:50,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,507 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:50,513 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,514 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:50,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,544 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:50,554 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,555 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:50,594 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,595 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:50,601 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,601 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:50,669 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,669 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 [2020-11-29 18:31:50,675 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,675 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:50,729 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,729 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 [2020-11-29 18:31:50,734 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,734 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:50,810 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,810 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:50,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,815 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:50,869 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,869 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:50,873 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:50,873 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:50,904 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:50,904 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:50,940 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:31:50,940 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:51,053 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:31:51,056 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:31:51,057 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:31:51,057 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:31:51,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:31:51,057 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:31:51,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,058 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:31:51,058 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:31:51,058 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration1_Loop [2020-11-29 18:31:51,058 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:31:51,058 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:31:51,060 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,077 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,092 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:51,267 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:31:51,272 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:51,284 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,286 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,287 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,287 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,287 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,288 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,291 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,291 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 [2020-11-29 18:31:51,294 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:51,348 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,351 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,351 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,351 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,352 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,352 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,353 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,353 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,355 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:51,409 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,411 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,412 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,412 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,412 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,412 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,413 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,413 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,416 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:51,465 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,466 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,467 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,467 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,467 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,467 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,468 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,468 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:51,470 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,509 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,511 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,511 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,511 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,511 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,511 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,512 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,512 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:51,514 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:51,547 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,549 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,550 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,550 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,551 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,554 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:51,582 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,585 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,585 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,585 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,585 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,585 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,586 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:51,593 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:51,623 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,625 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,626 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,626 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,626 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,627 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,627 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:51,630 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:51,698 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:51,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:51,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:51,700 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:51,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:51,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:51,703 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:51,703 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 [2020-11-29 18:31:51,706 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:31:51,711 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:31:51,712 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:51,723 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:31:51,723 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:31:51,723 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:31:51,724 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:51,769 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:31:51,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:31:51,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:51,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:31:51,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:31:52,139 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 [2020-11-29 18:31:52,141 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states. Second operand 6 states. [2020-11-29 18:31:52,427 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. [2020-11-29 18:31:52,428 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 [2020-11-29 18:31:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 18:31:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 21 transitions. [2020-11-29 18:31:52,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 18:31:52,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:31:52,435 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-29 18:31:52,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:31:52,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 21 transitions. Stem has 3 letters. Loop has 16 letters. [2020-11-29 18:31:52,436 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:31:52,437 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 85 states and 117 transitions. [2020-11-29 18:31:52,457 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 18:31:52,468 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 85 states to 61 states and 82 transitions. [2020-11-29 18:31:52,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-29 18:31:52,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-29 18:31:52,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 82 transitions. [2020-11-29 18:31:52,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:31:52,473 INFO L691 BuchiCegarLoop]: Abstraction has 61 states and 82 transitions. [2020-11-29 18:31:52,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states and 82 transitions. [2020-11-29 18:31:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 54. [2020-11-29 18:31:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-29 18:31:52,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 72 transitions. [2020-11-29 18:31:52,508 INFO L714 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-29 18:31:52,508 INFO L594 BuchiCegarLoop]: Abstraction has 54 states and 72 transitions. [2020-11-29 18:31:52,508 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 18:31:52,508 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 54 states and 72 transitions. [2020-11-29 18:31:52,511 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 18:31:52,511 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:31:52,511 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:31:52,513 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:52,513 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:52,513 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 := 8; 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 [2020-11-29 18:31:52,513 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 [2020-11-29 18:31:52,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:52,514 INFO L82 PathProgramCache]: Analyzing trace with hash -722660232, now seen corresponding path program 1 times [2020-11-29 18:31:52,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:52,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101598369] [2020-11-29 18:31:52,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:52,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 18:31:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:31:52,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101598369] [2020-11-29 18:31:52,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:31:52,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:31:52,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645436795] [2020-11-29 18:31:52,724 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:31:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:52,725 INFO L82 PathProgramCache]: Analyzing trace with hash -880179458, now seen corresponding path program 1 times [2020-11-29 18:31:52,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:52,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97864465] [2020-11-29 18:31:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:52,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:52,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:52,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:31:52,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97864465] [2020-11-29 18:31:52,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:31:52,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 18:31:52,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996717775] [2020-11-29 18:31:52,839 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:31:52,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:31:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:31:52,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:31:52,844 INFO L87 Difference]: Start difference. First operand 54 states and 72 transitions. cyclomatic complexity: 20 Second operand 6 states. [2020-11-29 18:31:52,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:31:52,985 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2020-11-29 18:31:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:31:52,987 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 68 states and 88 transitions. [2020-11-29 18:31:52,992 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 18:31:53,001 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 68 states to 66 states and 86 transitions. [2020-11-29 18:31:53,001 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 46 [2020-11-29 18:31:53,004 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 46 [2020-11-29 18:31:53,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 86 transitions. [2020-11-29 18:31:53,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:31:53,006 INFO L691 BuchiCegarLoop]: Abstraction has 66 states and 86 transitions. [2020-11-29 18:31:53,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states and 86 transitions. [2020-11-29 18:31:53,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-11-29 18:31:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-29 18:31:53,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 76 transitions. [2020-11-29 18:31:53,028 INFO L714 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-29 18:31:53,029 INFO L594 BuchiCegarLoop]: Abstraction has 58 states and 76 transitions. [2020-11-29 18:31:53,029 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 18:31:53,029 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 58 states and 76 transitions. [2020-11-29 18:31:53,035 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-11-29 18:31:53,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:31:53,036 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:31:53,038 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:53,039 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:53,039 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 := 8; 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 [2020-11-29 18:31:53,039 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 [2020-11-29 18:31:53,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:53,040 INFO L82 PathProgramCache]: Analyzing trace with hash -927605802, now seen corresponding path program 1 times [2020-11-29 18:31:53,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:53,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409770897] [2020-11-29 18:31:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:53,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:53,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-29 18:31:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:53,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:31:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409770897] [2020-11-29 18:31:53,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473835159] [2020-11-29 18:31:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:53,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:53,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:31:53,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:31:53,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:31:53,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 18:31:53,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544044141] [2020-11-29 18:31:53,339 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:31:53,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:53,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1515734512, now seen corresponding path program 1 times [2020-11-29 18:31:53,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:53,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470057444] [2020-11-29 18:31:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:53,358 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:53,364 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:53,367 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:31:53,665 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:31:53,665 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:31:53,666 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:31:53,666 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:31:53,666 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:31:53,666 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:53,666 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:31:53,666 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:31:53,666 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration3_Loop [2020-11-29 18:31:53,666 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:31:53,666 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:31:53,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,677 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,685 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:53,805 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:31:53,806 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:53,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:53,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:53,816 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:53,816 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:53,860 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:53,861 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:53,868 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:53,869 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:53,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:53,917 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 [2020-11-29 18:31:53,921 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:53,921 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:53,969 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:53,969 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 [2020-11-29 18:31:53,980 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:53,980 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:54,029 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:54,030 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:54,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:31:54,082 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:54,888 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:31:54,891 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:31:54,891 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:31:54,891 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:31:54,891 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:31:54,891 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:31:54,891 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:54,891 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:31:54,891 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:31:54,891 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration3_Loop [2020-11-29 18:31:54,891 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:31:54,891 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:31:54,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,907 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,911 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,952 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:54,959 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:55,057 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:31:55,058 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:31:55,070 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:55,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:55,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:55,072 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:55,072 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:55,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:55,073 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:55,073 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 [2020-11-29 18:31:55,076 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:55,105 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:55,106 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:55,107 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:55,107 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:55,107 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:55,107 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:55,108 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:55,108 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:55,110 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:55,138 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:55,140 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:55,140 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:55,140 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:55,140 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:55,140 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:55,141 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:55,141 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:55,148 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:55,177 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:31:55,178 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:31:55,179 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:31:55,179 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:31:55,179 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:31:55,179 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:31:55,181 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:31:55,181 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:31:55,197 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:31:55,217 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:31:55,217 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:55,224 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:31:55,225 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:31:55,225 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:31:55,225 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-11-29 18:31:55,251 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:31:55,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:55,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:31:55,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:55,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 18:31:55,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:55,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:31:55,654 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 [2020-11-29 18:31:55,654 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 58 states and 76 transitions. cyclomatic complexity: 20 Second operand 10 states. [2020-11-29 18:31:56,353 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. [2020-11-29 18:31:56,355 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 [2020-11-29 18:31:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 18:31:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 73 transitions. [2020-11-29 18:31:56,357 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 14 letters. [2020-11-29 18:31:56,358 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:31:56,358 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 30 letters. Loop has 14 letters. [2020-11-29 18:31:56,358 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:31:56,358 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 73 transitions. Stem has 16 letters. Loop has 28 letters. [2020-11-29 18:31:56,359 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:31:56,360 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 191 states and 263 transitions. [2020-11-29 18:31:56,372 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:31:56,383 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 191 states to 169 states and 237 transitions. [2020-11-29 18:31:56,383 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 103 [2020-11-29 18:31:56,385 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 106 [2020-11-29 18:31:56,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 237 transitions. [2020-11-29 18:31:56,386 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:31:56,386 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 237 transitions. [2020-11-29 18:31:56,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 237 transitions. [2020-11-29 18:31:56,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 152. [2020-11-29 18:31:56,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-29 18:31:56,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 206 transitions. [2020-11-29 18:31:56,411 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 206 transitions. [2020-11-29 18:31:56,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:31:56,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:31:56,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:31:56,413 INFO L87 Difference]: Start difference. First operand 152 states and 206 transitions. Second operand 10 states. [2020-11-29 18:31:56,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:31:56,660 INFO L93 Difference]: Finished difference Result 183 states and 244 transitions. [2020-11-29 18:31:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:31:56,662 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 183 states and 244 transitions. [2020-11-29 18:31:56,668 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:31:56,674 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 183 states to 180 states and 240 transitions. [2020-11-29 18:31:56,675 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 117 [2020-11-29 18:31:56,676 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 117 [2020-11-29 18:31:56,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 180 states and 240 transitions. [2020-11-29 18:31:56,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:31:56,676 INFO L691 BuchiCegarLoop]: Abstraction has 180 states and 240 transitions. [2020-11-29 18:31:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states and 240 transitions. [2020-11-29 18:31:56,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 167. [2020-11-29 18:31:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-29 18:31:56,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 225 transitions. [2020-11-29 18:31:56,698 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-29 18:31:56,698 INFO L594 BuchiCegarLoop]: Abstraction has 167 states and 225 transitions. [2020-11-29 18:31:56,698 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 18:31:56,699 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 167 states and 225 transitions. [2020-11-29 18:31:56,702 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:31:56,702 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:31:56,702 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:31:56,709 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] [2020-11-29 18:31:56,709 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] [2020-11-29 18:31:56,710 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 := 8; 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~ret10;havoc #t~ret9; 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~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-29 18:31:56,710 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~ret10;havoc #t~ret9; 1311#fibo2FINAL assume true; 1309#fibo2EXIT >#52#return; 1172#L15-1 [2020-11-29 18:31:56,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:56,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1380034771, now seen corresponding path program 1 times [2020-11-29 18:31:56,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:56,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708078984] [2020-11-29 18:31:56,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 18:31:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:56,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:56,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:31:56,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-11-29 18:31:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:56,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-11-29 18:31:56,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708078984] [2020-11-29 18:31:56,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350248227] [2020-11-29 18:31:56,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:57,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:31:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:57,487 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 17 proven. 91 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2020-11-29 18:31:57,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:31:57,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13] total 17 [2020-11-29 18:31:57,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788020275] [2020-11-29 18:31:57,490 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:31:57,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:57,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1411437133, now seen corresponding path program 1 times [2020-11-29 18:31:57,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:57,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385182168] [2020-11-29 18:31:57,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:57,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:57,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-11-29 18:31:57,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:31:57,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-11-29 18:31:57,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385182168] [2020-11-29 18:31:57,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461260868] [2020-11-29 18:31:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:31:57,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:57,914 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-11-29 18:31:57,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:31:57,914 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 12 [2020-11-29 18:31:57,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565032852] [2020-11-29 18:31:57,915 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:31:57,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:31:57,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:31:57,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:31:57,918 INFO L87 Difference]: Start difference. First operand 167 states and 225 transitions. cyclomatic complexity: 63 Second operand 12 states. [2020-11-29 18:31:58,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:31:58,377 INFO L93 Difference]: Finished difference Result 223 states and 293 transitions. [2020-11-29 18:31:58,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:31:58,378 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 223 states and 293 transitions. [2020-11-29 18:31:58,384 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:31:58,403 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 223 states to 200 states and 262 transitions. [2020-11-29 18:31:58,404 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 134 [2020-11-29 18:31:58,405 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 134 [2020-11-29 18:31:58,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 200 states and 262 transitions. [2020-11-29 18:31:58,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:31:58,406 INFO L691 BuchiCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-11-29 18:31:58,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states and 262 transitions. [2020-11-29 18:31:58,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 184. [2020-11-29 18:31:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-11-29 18:31:58,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 238 transitions. [2020-11-29 18:31:58,438 INFO L714 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-29 18:31:58,438 INFO L594 BuchiCegarLoop]: Abstraction has 184 states and 238 transitions. [2020-11-29 18:31:58,439 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 18:31:58,439 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 184 states and 238 transitions. [2020-11-29 18:31:58,443 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:31:58,443 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:31:58,443 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:31:58,452 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] [2020-11-29 18:31:58,452 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:31:58,452 INFO L794 eck$LassoCheckResult]: Stem: 2329#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(18);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2319#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 2301#L39 call main_#t~ret11 := fibo1(main_~x~0);< 2302#fibo1ENTRY ~n := #in~n; 2364#L10 assume !(~n < 1); 2318#L12 assume !(1 == ~n); 2282#L15 call #t~ret7 := fibo2(~n - 1);< 2322#fibo2ENTRY ~n := #in~n; 2413#L20 assume !(~n < 1); 2281#L22 assume !(1 == ~n); 2283#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2350#L10 assume !(~n < 1); 2348#L12 assume !(1 == ~n); 2265#L15 call #t~ret7 := fibo2(~n - 1);< 2344#fibo2ENTRY ~n := #in~n; 2367#L20 assume !(~n < 1); 2366#L22 assume !(1 == ~n); 2336#L25 call #t~ret9 := fibo1(~n - 1);< 2311#fibo1ENTRY ~n := #in~n; 2353#L10 assume !(~n < 1); 2377#L12 assume 1 == ~n;#res := 1; 2378#fibo1FINAL assume true; 2444#fibo1EXIT >#48#return; 2291#L25-1 call #t~ret10 := fibo1(~n - 2);< 2314#fibo1ENTRY ~n := #in~n; 2290#L10 assume ~n < 1;#res := 0; 2292#fibo1FINAL assume true; 2447#fibo1EXIT >#50#return; 2264#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 2267#fibo2FINAL assume true; 2387#fibo2EXIT >#52#return; 2286#L15-1 [2020-11-29 18:31:58,453 INFO L796 eck$LassoCheckResult]: Loop: 2286#L15-1 call #t~ret8 := fibo2(~n - 2);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume !(1 == ~n); 2394#L25 call #t~ret9 := fibo1(~n - 1);< 2403#fibo1ENTRY ~n := #in~n; 2408#L10 assume !(~n < 1); 2406#L12 assume !(1 == ~n); 2287#L15 call #t~ret7 := fibo2(~n - 1);< 2335#fibo2ENTRY ~n := #in~n; 2414#L20 assume !(~n < 1); 2415#L22 assume 1 == ~n;#res := 1; 2284#fibo2FINAL assume true; 2288#fibo2EXIT >#52#return; 2286#L15-1 [2020-11-29 18:31:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:58,454 INFO L82 PathProgramCache]: Analyzing trace with hash -658151768, now seen corresponding path program 1 times [2020-11-29 18:31:58,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:58,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743076721] [2020-11-29 18:31:58,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:58,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:58,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 18:31:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:58,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:31:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:58,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:31:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:31:58,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743076721] [2020-11-29 18:31:58,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725083304] [2020-11-29 18:31:58,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:31:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:31:58,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:31:58,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:31:58,882 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:31:58,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:31:58,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-11-29 18:31:58,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996095670] [2020-11-29 18:31:58,884 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:31:58,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:31:58,888 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 1 times [2020-11-29 18:31:58,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:31:58,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246027446] [2020-11-29 18:31:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:31:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:58,897 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:31:58,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:31:58,908 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:31:59,199 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:31:59,200 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:31:59,200 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:31:59,200 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:31:59,200 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:31:59,200 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,200 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:31:59,200 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:31:59,200 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration5_Loop [2020-11-29 18:31:59,200 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:31:59,200 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:31:59,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,229 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,240 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:31:59,340 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:31:59,340 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:31:59,351 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:59,351 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,356 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:59,357 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 38 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 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:59,392 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:59,395 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:59,395 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 39 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 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,424 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:59,424 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:59,428 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:59,428 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo1_#t~ret7=1} Honda state: {fibo1_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 40 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,457 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:59,457 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:59,459 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:59,460 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,491 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:59,491 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:31:59,494 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:31:59,494 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:31:59,523 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:31:59,555 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:31:59,555 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:00,433 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:32:00,436 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:00,436 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:00,436 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:00,436 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:00,436 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:32:00,436 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:00,436 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:00,436 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:00,436 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration5_Loop [2020-11-29 18:32:00,436 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:00,436 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:00,438 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,445 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,449 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,452 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,468 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:00,579 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:00,579 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,591 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 [2020-11-29 18:32:00,592 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,593 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,593 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,593 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,593 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,594 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,594 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,606 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,644 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,646 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,646 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,647 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,647 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,647 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,648 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,648 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,650 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,690 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,691 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,692 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,692 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,692 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,692 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,693 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,693 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,695 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 47 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 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:00,724 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,726 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,726 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,726 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,726 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,726 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,727 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,727 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,728 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,757 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,758 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,759 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,759 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,759 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,759 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,759 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,772 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,805 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,807 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,807 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,807 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,807 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,808 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,808 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,808 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,817 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,846 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,848 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,848 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,848 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,849 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,849 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,849 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,849 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,851 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:00,880 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:00,882 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:00,882 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:00,882 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:00,882 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:00,883 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:00,884 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:00,884 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:00,887 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:32:00,891 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:32:00,891 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:32:00,895 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:32:00,895 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:32:00,896 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:32:00,896 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:00,946 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:32:01,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:01,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:32:01,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:01,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:01,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:01,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 18:32:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:01,349 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 [2020-11-29 18:32:01,349 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59 Second operand 10 states. [2020-11-29 18:32:02,144 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 184 states and 238 transitions. cyclomatic complexity: 59. Second operand 10 states. Result 717 states and 936 transitions. Complement of second has 40 states. [2020-11-29 18:32:02,150 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 [2020-11-29 18:32:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 18:32:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 69 transitions. [2020-11-29 18:32:02,153 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 14 letters. [2020-11-29 18:32:02,154 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:02,155 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-29 18:32:02,156 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:02,157 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 69 transitions. Stem has 32 letters. Loop has 28 letters. [2020-11-29 18:32:02,158 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:02,162 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 717 states and 936 transitions. [2020-11-29 18:32:02,181 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-29 18:32:02,205 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 717 states to 646 states and 859 transitions. [2020-11-29 18:32:02,206 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 301 [2020-11-29 18:32:02,209 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 308 [2020-11-29 18:32:02,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 646 states and 859 transitions. [2020-11-29 18:32:02,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:02,219 INFO L691 BuchiCegarLoop]: Abstraction has 646 states and 859 transitions. [2020-11-29 18:32:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states and 859 transitions. [2020-11-29 18:32:02,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 625. [2020-11-29 18:32:02,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 625 states. [2020-11-29 18:32:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 829 transitions. [2020-11-29 18:32:02,305 INFO L714 BuchiCegarLoop]: Abstraction has 625 states and 829 transitions. [2020-11-29 18:32:02,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:02,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-29 18:32:02,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-11-29 18:32:02,307 INFO L87 Difference]: Start difference. First operand 625 states and 829 transitions. Second operand 15 states. [2020-11-29 18:32:02,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:02,793 INFO L93 Difference]: Finished difference Result 677 states and 901 transitions. [2020-11-29 18:32:02,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 18:32:02,794 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 677 states and 901 transitions. [2020-11-29 18:32:02,811 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-29 18:32:02,829 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 677 states to 674 states and 897 transitions. [2020-11-29 18:32:02,829 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 322 [2020-11-29 18:32:02,830 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 322 [2020-11-29 18:32:02,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 674 states and 897 transitions. [2020-11-29 18:32:02,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:02,832 INFO L691 BuchiCegarLoop]: Abstraction has 674 states and 897 transitions. [2020-11-29 18:32:02,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states and 897 transitions. [2020-11-29 18:32:02,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 635. [2020-11-29 18:32:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 635 states. [2020-11-29 18:32:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 635 states to 635 states and 838 transitions. [2020-11-29 18:32:02,878 INFO L714 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-11-29 18:32:02,878 INFO L594 BuchiCegarLoop]: Abstraction has 635 states and 838 transitions. [2020-11-29 18:32:02,878 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 18:32:02,878 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 635 states and 838 transitions. [2020-11-29 18:32:02,887 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 40 [2020-11-29 18:32:02,887 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:02,888 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:02,892 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] [2020-11-29 18:32:02,892 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:02,895 INFO L794 eck$LassoCheckResult]: Stem: 4883#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); 4882#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 4854#L39 call main_#t~ret11 := fibo1(main_~x~0);< 4855#fibo1ENTRY ~n := #in~n; 5175#L10 assume !(~n < 1); 5174#L12 assume !(1 == ~n); 4899#L15 call #t~ret7 := fibo2(~n - 1);< 5170#fibo2ENTRY ~n := #in~n; 5159#L20 assume !(~n < 1); 5157#L22 assume !(1 == ~n); 5144#L25 call #t~ret9 := fibo1(~n - 1);< 5154#fibo1ENTRY ~n := #in~n; 5152#L10 assume !(~n < 1); 5149#L12 assume !(1 == ~n); 4924#L15 call #t~ret7 := fibo2(~n - 1);< 5015#fibo2ENTRY ~n := #in~n; 5138#L20 assume !(~n < 1); 5066#L22 assume !(1 == ~n); 4862#L25 call #t~ret9 := fibo1(~n - 1);< 5032#fibo1ENTRY ~n := #in~n; 5033#L10 assume !(~n < 1); 5118#L12 assume !(1 == ~n); 4999#L15 call #t~ret7 := fibo2(~n - 1);< 5004#fibo2ENTRY ~n := #in~n; 4998#L20 assume !(~n < 1); 5000#L22 assume 1 == ~n;#res := 1; 5369#fibo2FINAL assume true; 5367#fibo2EXIT >#52#return; 4985#L15-1 call #t~ret8 := fibo2(~n - 2);< 4995#fibo2ENTRY ~n := #in~n; 4990#L20 assume ~n < 1;#res := 0; 4984#fibo2FINAL assume true; 4986#fibo2EXIT >#54#return; 4978#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 4979#fibo1FINAL assume true; 4943#fibo1EXIT >#48#return; 4915#L25-1 call #t~ret10 := fibo1(~n - 2);< 4926#fibo1ENTRY ~n := #in~n; 5451#L10 assume ~n < 1;#res := 0; 5450#fibo1FINAL assume true; 5446#fibo1EXIT >#50#return; 5432#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 5428#fibo2FINAL assume true; 5426#fibo2EXIT >#52#return; 4868#L15-1 call #t~ret8 := fibo2(~n - 2);< 4889#fibo2ENTRY [2020-11-29 18:32:02,895 INFO L796 eck$LassoCheckResult]: Loop: 4889#fibo2ENTRY ~n := #in~n; 4948#L20 assume !(~n < 1); 4904#L22 assume !(1 == ~n); 4867#L25 call #t~ret9 := fibo1(~n - 1);< 4872#fibo1ENTRY ~n := #in~n; 5385#L10 assume !(~n < 1); 5383#L12 assume !(1 == ~n); 4870#L15 call #t~ret7 := fibo2(~n - 1);< 4889#fibo2ENTRY [2020-11-29 18:32:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1560322136, now seen corresponding path program 1 times [2020-11-29 18:32:02,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:02,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205752295] [2020-11-29 18:32:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:02,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 18:32:02,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:02,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:03,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:03,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:03,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:32:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:03,129 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-11-29 18:32:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205752295] [2020-11-29 18:32:03,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678863641] [2020-11-29 18:32:03,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:03,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:32:03,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 18:32:03,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:03,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 14] total 19 [2020-11-29 18:32:03,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123873936] [2020-11-29 18:32:03,549 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:03,550 INFO L82 PathProgramCache]: Analyzing trace with hash 996300776, now seen corresponding path program 2 times [2020-11-29 18:32:03,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:03,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380409813] [2020-11-29 18:32:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:03,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:03,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:03,567 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:32:03,729 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:03,729 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:03,729 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:03,729 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:03,729 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:32:03,729 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:03,729 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:03,729 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:03,729 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration6_Loop [2020-11-29 18:32:03,729 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:03,730 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:03,731 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,744 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,754 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,760 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,768 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,772 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,790 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:03,893 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:03,893 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:03,898 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:03,898 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:03,901 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:03,901 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:03,933 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:03,933 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:03,937 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:03,937 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:03,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:03,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:03,969 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:03,969 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:32:03,997 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:03,997 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,000 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:04,001 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,031 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:04,031 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:04,034 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:04,035 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,065 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:04,065 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:04,068 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:04,068 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,099 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:04,099 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:04,102 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:04,102 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,132 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:04,132 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:04,135 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:04,135 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,163 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:04,164 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:32:04,198 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:32:04,198 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,304 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:32:04,305 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:04,306 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:04,306 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:04,306 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:04,306 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:32:04,306 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,306 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:04,306 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:04,306 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration6_Loop [2020-11-29 18:32:04,306 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:04,306 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:04,308 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,327 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,330 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,333 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,341 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:04,407 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:04,407 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,420 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,422 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,422 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,422 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,422 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,422 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,423 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,423 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,424 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 65 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 65 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,452 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,454 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,454 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,454 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,454 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,454 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,455 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,456 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,457 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,487 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,488 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,488 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,489 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,489 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,489 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,491 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,491 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,503 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,532 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,534 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,534 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,534 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,534 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,534 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,535 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,535 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,536 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,565 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,566 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,567 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,567 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,567 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,567 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,568 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,569 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,598 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,599 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,599 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,600 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,600 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,600 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,600 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,600 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,602 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,633 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,635 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,635 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,635 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,635 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,635 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,636 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,636 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,637 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,667 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,668 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,668 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,669 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,669 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,669 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,669 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,669 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,671 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:04,700 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,702 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,702 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,702 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,702 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,702 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,703 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,704 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,732 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:04,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:04,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:04,734 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:04,734 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:04,734 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:04,735 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:04,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:04,737 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:32:04,739 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:32:04,739 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:04,742 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:32:04,742 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:32:04,742 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:32:04,742 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_#in~n) = 1*fibo2_#in~n Supporting invariants [] [2020-11-29 18:32:04,769 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:32:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:04,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:04,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:04,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:04,914 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:04,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:04,921 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:04,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:05,016 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 [2020-11-29 18:32:05,016 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-11-29 18:32:05,286 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-11-29 18:32:05,287 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 [2020-11-29 18:32:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 18:32:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-11-29 18:32:05,288 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-29 18:32:05,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:05,290 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:05,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:05,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:05,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:05,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:05,537 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:05,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:05,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:05,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:05,640 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 [2020-11-29 18:32:05,641 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-11-29 18:32:05,902 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 947 states and 1222 transitions. Complement of second has 24 states. [2020-11-29 18:32:05,903 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 [2020-11-29 18:32:05,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 18:32:05,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 39 transitions. [2020-11-29 18:32:05,904 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 39 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-29 18:32:05,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:05,905 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:05,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:06,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:06,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:06,058 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:06,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:06,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:06,082 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:06,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:06,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:06,181 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 [2020-11-29 18:32:06,182 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220 Second operand 7 states. [2020-11-29 18:32:06,491 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 635 states and 838 transitions. cyclomatic complexity: 220. Second operand 7 states. Result 1303 states and 1629 transitions. Complement of second has 23 states. [2020-11-29 18:32:06,493 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 [2020-11-29 18:32:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 18:32:06,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-29 18:32:06,494 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 8 letters. [2020-11-29 18:32:06,495 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:06,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 53 letters. Loop has 8 letters. [2020-11-29 18:32:06,496 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:06,496 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 45 letters. Loop has 16 letters. [2020-11-29 18:32:06,499 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:06,499 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1303 states and 1629 transitions. [2020-11-29 18:32:06,522 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 88 [2020-11-29 18:32:06,541 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1303 states to 988 states and 1292 transitions. [2020-11-29 18:32:06,541 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 381 [2020-11-29 18:32:06,543 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 427 [2020-11-29 18:32:06,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 988 states and 1292 transitions. [2020-11-29 18:32:06,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:06,545 INFO L691 BuchiCegarLoop]: Abstraction has 988 states and 1292 transitions. [2020-11-29 18:32:06,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states and 1292 transitions. [2020-11-29 18:32:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 899. [2020-11-29 18:32:06,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2020-11-29 18:32:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1160 transitions. [2020-11-29 18:32:06,594 INFO L714 BuchiCegarLoop]: Abstraction has 899 states and 1160 transitions. [2020-11-29 18:32:06,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:06,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-29 18:32:06,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2020-11-29 18:32:06,602 INFO L87 Difference]: Start difference. First operand 899 states and 1160 transitions. Second operand 19 states. [2020-11-29 18:32:07,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:07,568 INFO L93 Difference]: Finished difference Result 1253 states and 1799 transitions. [2020-11-29 18:32:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 18:32:07,570 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1253 states and 1799 transitions. [2020-11-29 18:32:07,595 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 104 [2020-11-29 18:32:07,625 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1253 states to 1247 states and 1793 transitions. [2020-11-29 18:32:07,625 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 546 [2020-11-29 18:32:07,627 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 546 [2020-11-29 18:32:07,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1247 states and 1793 transitions. [2020-11-29 18:32:07,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:07,629 INFO L691 BuchiCegarLoop]: Abstraction has 1247 states and 1793 transitions. [2020-11-29 18:32:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states and 1793 transitions. [2020-11-29 18:32:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1103. [2020-11-29 18:32:07,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1103 states. [2020-11-29 18:32:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1103 states to 1103 states and 1503 transitions. [2020-11-29 18:32:07,691 INFO L714 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-11-29 18:32:07,691 INFO L594 BuchiCegarLoop]: Abstraction has 1103 states and 1503 transitions. [2020-11-29 18:32:07,691 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 18:32:07,692 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1103 states and 1503 transitions. [2020-11-29 18:32:07,704 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 101 [2020-11-29 18:32:07,704 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:07,704 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:07,706 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] [2020-11-29 18:32:07,706 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:07,708 INFO L794 eck$LassoCheckResult]: Stem: 11730#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); 11729#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 11692#L39 call main_#t~ret11 := fibo1(main_~x~0);< 11693#fibo1ENTRY ~n := #in~n; 11814#L10 assume !(~n < 1); 11813#L12 assume !(1 == ~n); 11809#L15 call #t~ret7 := fibo2(~n - 1);< 11812#fibo2ENTRY ~n := #in~n; 11811#L20 assume !(~n < 1); 11810#L22 assume !(1 == ~n); 11805#L25 call #t~ret9 := fibo1(~n - 1);< 11808#fibo1ENTRY ~n := #in~n; 11807#L10 assume !(~n < 1); 11806#L12 assume !(1 == ~n); 11784#L15 call #t~ret7 := fibo2(~n - 1);< 11786#fibo2ENTRY ~n := #in~n; 11804#L20 assume !(~n < 1); 11800#L22 assume !(1 == ~n); 11781#L25 call #t~ret9 := fibo1(~n - 1);< 11794#fibo1ENTRY ~n := #in~n; 11795#L10 assume !(~n < 1); 11802#L12 assume !(1 == ~n); 11803#L15 call #t~ret7 := fibo2(~n - 1);< 12322#fibo2ENTRY ~n := #in~n; 12330#L20 assume !(~n < 1); 12327#L22 assume 1 == ~n;#res := 1; 12326#fibo2FINAL assume true; 12321#fibo2EXIT >#52#return; 12316#L15-1 call #t~ret8 := fibo2(~n - 2);< 12317#fibo2ENTRY ~n := #in~n; 12343#L20 assume ~n < 1;#res := 0; 12342#fibo2FINAL assume true; 12315#fibo2EXIT >#54#return; 12310#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 12307#fibo1FINAL assume true; 12304#fibo1EXIT >#48#return; 12290#L25-1 call #t~ret10 := fibo1(~n - 2);< 12294#fibo1ENTRY ~n := #in~n; 12295#L10 assume !(~n < 1); 12287#L12 assume !(1 == ~n); 11683#L15 call #t~ret7 := fibo2(~n - 1);< 12278#fibo2ENTRY ~n := #in~n; 12279#L20 assume !(~n < 1); 12264#L22 assume 1 == ~n;#res := 1; 12265#fibo2FINAL assume true; 12670#fibo2EXIT >#52#return; 11714#L15-1 [2020-11-29 18:32:07,708 INFO L796 eck$LassoCheckResult]: Loop: 11714#L15-1 call #t~ret8 := fibo2(~n - 2);< 12362#fibo2ENTRY ~n := #in~n; 11766#L20 assume !(~n < 1); 11767#L22 assume !(1 == ~n); 11713#L25 call #t~ret9 := fibo1(~n - 1);< 11715#fibo1ENTRY ~n := #in~n; 12297#L10 assume !(~n < 1); 12298#L12 assume !(1 == ~n); 11743#L15 call #t~ret7 := fibo2(~n - 1);< 11745#fibo2ENTRY ~n := #in~n; 11751#L20 assume !(~n < 1); 12722#L22 assume 1 == ~n;#res := 1; 12720#fibo2FINAL assume true; 12676#fibo2EXIT >#52#return; 11714#L15-1 [2020-11-29 18:32:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash -663651953, now seen corresponding path program 1 times [2020-11-29 18:32:07,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:07,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988048387] [2020-11-29 18:32:07,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:07,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:07,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:32:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:07,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:07,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:07,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:07,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-11-29 18:32:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:07,962 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 18:32:07,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988048387] [2020-11-29 18:32:07,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905111785] [2020-11-29 18:32:07,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:08,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:32:08,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:08,143 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:32:08,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:08,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-11-29 18:32:08,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513673692] [2020-11-29 18:32:08,146 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:08,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:08,147 INFO L82 PathProgramCache]: Analyzing trace with hash -815837104, now seen corresponding path program 2 times [2020-11-29 18:32:08,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:08,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939116463] [2020-11-29 18:32:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:08,152 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:08,158 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:08,161 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:32:08,382 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:08,382 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:08,382 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:08,382 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:08,382 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:32:08,382 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:08,382 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:08,382 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:08,382 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration7_Loop [2020-11-29 18:32:08,383 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:08,383 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:08,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,396 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,402 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,404 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,419 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,422 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:08,484 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:08,484 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:08,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,488 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:08,491 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:08,491 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:08,519 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,520 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:08,522 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:08,522 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:08,549 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,549 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:08,552 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:08,552 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:08,580 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,580 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:08,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:08,591 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:08,630 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,630 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:08,633 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:08,633 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:08,661 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,661 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:08,664 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:08,664 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 82 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 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:08,694 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:08,694 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:08,725 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:32:08,725 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:10,038 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:32:10,041 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:10,041 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:10,041 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:10,041 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:10,041 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:32:10,041 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,041 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:10,041 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:10,042 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration7_Loop [2020-11-29 18:32:10,042 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:10,042 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:10,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,064 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,070 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:10,166 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:10,166 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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 [2020-11-29 18:32:10,169 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:10,171 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:10,171 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:10,172 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:10,172 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:10,172 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:10,173 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:10,173 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:10,180 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:32:10,233 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:10,236 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:10,237 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:10,237 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:10,237 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:10,237 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:10,238 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:10,238 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,240 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/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) [2020-11-29 18:32:10,289 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:10,291 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:10,292 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:10,292 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:10,292 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:10,292 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:10,293 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:10,293 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,295 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 87 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 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,331 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:10,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:10,333 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:10,333 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:10,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:10,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:10,333 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:10,333 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:10,335 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 88 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 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,362 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:10,364 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:10,364 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:10,364 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:10,364 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:10,364 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:10,366 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:10,366 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:10,378 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 89 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 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,406 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:10,408 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:10,408 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:10,408 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:10,408 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:10,408 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:10,410 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:10,410 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:10,413 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:32:10,417 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:32:10,417 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 90 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 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:10,420 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:32:10,420 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:32:10,420 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:32:10,420 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-29 18:32:10,446 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:32:10,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:10,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:10,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:10,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:10,566 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:10,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:10,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 18:32:10,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:10,784 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 [2020-11-29 18:32:10,784 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-11-29 18:32:11,478 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1956 states and 2660 transitions. Complement of second has 40 states. [2020-11-29 18:32:11,479 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 [2020-11-29 18:32:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 18:32:11,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 67 transitions. [2020-11-29 18:32:11,482 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 67 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-29 18:32:11,482 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:11,482 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:11,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:11,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:11,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:11,669 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:11,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 18:32:11,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:11,895 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 [2020-11-29 18:32:11,895 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-11-29 18:32:12,297 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 1734 states and 2285 transitions. Complement of second has 26 states. [2020-11-29 18:32:12,298 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 [2020-11-29 18:32:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 18:32:12,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 46 transitions. [2020-11-29 18:32:12,299 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 46 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-29 18:32:12,299 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:12,299 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:12,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:12,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:12,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:12,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-29 18:32:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:12,653 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 [2020-11-29 18:32:12,653 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417 Second operand 10 states. [2020-11-29 18:32:13,187 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 1103 states and 1503 transitions. cyclomatic complexity: 417. Second operand 10 states. Result 5452 states and 7496 transitions. Complement of second has 124 states. [2020-11-29 18:32:13,188 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 [2020-11-29 18:32:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 18:32:13,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 72 transitions. [2020-11-29 18:32:13,190 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 14 letters. [2020-11-29 18:32:13,191 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:13,191 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 60 letters. Loop has 14 letters. [2020-11-29 18:32:13,193 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:13,193 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 72 transitions. Stem has 46 letters. Loop has 28 letters. [2020-11-29 18:32:13,195 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:13,195 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5452 states and 7496 transitions. [2020-11-29 18:32:13,302 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 243 [2020-11-29 18:32:13,353 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5452 states to 2913 states and 4140 transitions. [2020-11-29 18:32:13,353 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 787 [2020-11-29 18:32:13,356 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 929 [2020-11-29 18:32:13,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2913 states and 4140 transitions. [2020-11-29 18:32:13,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:13,357 INFO L691 BuchiCegarLoop]: Abstraction has 2913 states and 4140 transitions. [2020-11-29 18:32:13,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states and 4140 transitions. [2020-11-29 18:32:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2461. [2020-11-29 18:32:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2461 states. [2020-11-29 18:32:13,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2461 states to 2461 states and 3426 transitions. [2020-11-29 18:32:13,476 INFO L714 BuchiCegarLoop]: Abstraction has 2461 states and 3426 transitions. [2020-11-29 18:32:13,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:13,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-29 18:32:13,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-11-29 18:32:13,477 INFO L87 Difference]: Start difference. First operand 2461 states and 3426 transitions. Second operand 17 states. [2020-11-29 18:32:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:14,224 INFO L93 Difference]: Finished difference Result 3452 states and 5090 transitions. [2020-11-29 18:32:14,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-29 18:32:14,225 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 3452 states and 5090 transitions. [2020-11-29 18:32:14,278 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 341 [2020-11-29 18:32:14,339 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 3452 states to 3449 states and 5086 transitions. [2020-11-29 18:32:14,339 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 1086 [2020-11-29 18:32:14,342 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 1086 [2020-11-29 18:32:14,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3449 states and 5086 transitions. [2020-11-29 18:32:14,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:14,343 INFO L691 BuchiCegarLoop]: Abstraction has 3449 states and 5086 transitions. [2020-11-29 18:32:14,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3449 states and 5086 transitions. [2020-11-29 18:32:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3449 to 3231. [2020-11-29 18:32:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3231 states. [2020-11-29 18:32:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3231 states to 3231 states and 4807 transitions. [2020-11-29 18:32:14,497 INFO L714 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-11-29 18:32:14,497 INFO L594 BuchiCegarLoop]: Abstraction has 3231 states and 4807 transitions. [2020-11-29 18:32:14,497 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 18:32:14,497 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 3231 states and 4807 transitions. [2020-11-29 18:32:14,526 INFO L131 ngComponentsAnalysis]: Automaton has 11 accepting balls. 340 [2020-11-29 18:32:14,526 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:14,527 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:14,531 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:14,532 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:14,532 INFO L794 eck$LassoCheckResult]: Stem: 28905#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); 28904#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 28851#L39 call main_#t~ret11 := fibo1(main_~x~0);< 28852#fibo1ENTRY ~n := #in~n; 29012#L10 assume !(~n < 1); 29011#L12 assume !(1 == ~n); 29007#L15 call #t~ret7 := fibo2(~n - 1);< 29010#fibo2ENTRY ~n := #in~n; 29009#L20 assume !(~n < 1); 29008#L22 assume !(1 == ~n); 29003#L25 call #t~ret9 := fibo1(~n - 1);< 29006#fibo1ENTRY ~n := #in~n; 29005#L10 assume !(~n < 1); 29004#L12 assume !(1 == ~n); 28998#L15 call #t~ret7 := fibo2(~n - 1);< 29002#fibo2ENTRY ~n := #in~n; 29001#L20 assume !(~n < 1); 29000#L22 assume !(1 == ~n); 28963#L25 call #t~ret9 := fibo1(~n - 1);< 28996#fibo1ENTRY ~n := #in~n; 28993#L10 assume !(~n < 1); 28978#L12 assume !(1 == ~n); 28968#L15 call #t~ret7 := fibo2(~n - 1);< 28987#fibo2ENTRY ~n := #in~n; 28985#L20 assume !(~n < 1); 28981#L22 assume 1 == ~n;#res := 1; 28982#fibo2FINAL assume true; 28967#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29013#L20 assume !(~n < 1); 29014#L22 assume !(1 == ~n); 28947#L25 call #t~ret9 := fibo1(~n - 1);< 28946#fibo1ENTRY ~n := #in~n; 28948#L10 assume !(~n < 1); 28977#L12 assume !(1 == ~n); 28966#L15 call #t~ret7 := fibo2(~n - 1);< 28969#fibo2ENTRY ~n := #in~n; 28991#L20 assume !(~n < 1); 28979#L22 assume 1 == ~n;#res := 1; 28974#fibo2FINAL assume true; 28965#fibo2EXIT >#52#return; 28961#L15-1 call #t~ret8 := fibo2(~n - 2);< 28964#fibo2ENTRY ~n := #in~n; 29015#L20 assume !(~n < 1); 30398#L22 assume !(1 == ~n); 30002#L25 call #t~ret9 := fibo1(~n - 1);< 30003#fibo1ENTRY ~n := #in~n; 30393#L10 assume !(~n < 1); 30391#L12 assume 1 == ~n;#res := 1; 30390#fibo1FINAL assume true; 30001#fibo1EXIT >#48#return; 29996#L25-1 call #t~ret10 := fibo1(~n - 2);< 29999#fibo1ENTRY ~n := #in~n; 30297#L10 assume ~n < 1;#res := 0; 30287#fibo1FINAL assume true; 29995#fibo1EXIT >#50#return; 29990#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 29989#fibo2FINAL assume true; 29958#fibo2EXIT >#54#return; 29947#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 29939#fibo1FINAL assume true; 29880#fibo1EXIT >#48#return; 29878#L25-1 [2020-11-29 18:32:14,533 INFO L796 eck$LassoCheckResult]: Loop: 29878#L25-1 call #t~ret10 := fibo1(~n - 2);< 29927#fibo1ENTRY ~n := #in~n; 29986#L10 assume !(~n < 1); 29984#L12 assume !(1 == ~n); 29926#L15 call #t~ret7 := fibo2(~n - 1);< 29983#fibo2ENTRY ~n := #in~n; 30397#L20 assume !(~n < 1); 30395#L22 assume 1 == ~n;#res := 1; 29982#fibo2FINAL assume true; 29953#fibo2EXIT >#52#return; 29954#L15-1 call #t~ret8 := fibo2(~n - 2);< 29959#fibo2ENTRY ~n := #in~n; 30220#L20 assume !(~n < 1); 30218#L22 assume !(1 == ~n); 29882#L25 call #t~ret9 := fibo1(~n - 1);< 29925#fibo1ENTRY ~n := #in~n; 30433#L10 assume !(~n < 1); 30431#L12 assume !(1 == ~n); 30114#L15 call #t~ret7 := fibo2(~n - 1);< 30115#fibo2ENTRY ~n := #in~n; 30209#L20 assume !(~n < 1); 30185#L22 assume 1 == ~n;#res := 1; 30133#fibo2FINAL assume true; 30112#fibo2EXIT >#52#return; 30103#L15-1 call #t~ret8 := fibo2(~n - 2);< 30108#fibo2ENTRY ~n := #in~n; 30174#L20 assume ~n < 1;#res := 0; 30140#fibo2FINAL assume true; 30102#fibo2EXIT >#54#return; 30101#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 30099#fibo1FINAL assume true; 30096#fibo1EXIT >#48#return; 29878#L25-1 [2020-11-29 18:32:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash -947123609, now seen corresponding path program 1 times [2020-11-29 18:32:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:14,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790492032] [2020-11-29 18:32:14,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 18:32:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-11-29 18:32:14,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:14,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:14,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:14,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 11 proven. 79 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-11-29 18:32:14,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790492032] [2020-11-29 18:32:14,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39632157] [2020-11-29 18:32:14,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:14,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 18:32:14,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 62 proven. 22 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-29 18:32:14,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:14,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-29 18:32:14,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766778408] [2020-11-29 18:32:14,944 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash 630784763, now seen corresponding path program 1 times [2020-11-29 18:32:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:14,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905130833] [2020-11-29 18:32:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:14,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 18:32:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-11-29 18:32:15,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,043 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-11-29 18:32:15,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905130833] [2020-11-29 18:32:15,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902638577] [2020-11-29 18:32:15,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:32:15,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:32:15,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:15,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 18:32:15,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508477222] [2020-11-29 18:32:15,127 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:32:15,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:15,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:32:15,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:32:15,128 INFO L87 Difference]: Start difference. First operand 3231 states and 4807 transitions. cyclomatic complexity: 1612 Second operand 8 states. [2020-11-29 18:32:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:15,279 INFO L93 Difference]: Finished difference Result 1630 states and 2151 transitions. [2020-11-29 18:32:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:32:15,280 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1630 states and 2151 transitions. [2020-11-29 18:32:15,301 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-11-29 18:32:15,324 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1630 states to 1533 states and 2040 transitions. [2020-11-29 18:32:15,324 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 596 [2020-11-29 18:32:15,326 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 596 [2020-11-29 18:32:15,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1533 states and 2040 transitions. [2020-11-29 18:32:15,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:15,326 INFO L691 BuchiCegarLoop]: Abstraction has 1533 states and 2040 transitions. [2020-11-29 18:32:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1533 states and 2040 transitions. [2020-11-29 18:32:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1533 to 1399. [2020-11-29 18:32:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1399 states. [2020-11-29 18:32:15,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1399 states to 1399 states and 1795 transitions. [2020-11-29 18:32:15,388 INFO L714 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-11-29 18:32:15,388 INFO L594 BuchiCegarLoop]: Abstraction has 1399 states and 1795 transitions. [2020-11-29 18:32:15,388 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 18:32:15,388 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1399 states and 1795 transitions. [2020-11-29 18:32:15,397 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 132 [2020-11-29 18:32:15,397 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:15,397 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:15,401 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:15,401 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 8, 7, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2] [2020-11-29 18:32:15,402 INFO L794 eck$LassoCheckResult]: Stem: 34168#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); 34158#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 34119#L39 call main_#t~ret11 := fibo1(main_~x~0);< 34120#fibo1ENTRY ~n := #in~n; 34215#L10 assume !(~n < 1); 34214#L12 assume !(1 == ~n); 34210#L15 call #t~ret7 := fibo2(~n - 1);< 34213#fibo2ENTRY ~n := #in~n; 34212#L20 assume !(~n < 1); 34211#L22 assume !(1 == ~n); 34204#L25 call #t~ret9 := fibo1(~n - 1);< 34209#fibo1ENTRY ~n := #in~n; 34207#L10 assume !(~n < 1); 34208#L12 assume !(1 == ~n); 34197#L15 call #t~ret7 := fibo2(~n - 1);< 34205#fibo2ENTRY ~n := #in~n; 34200#L20 assume !(~n < 1); 34201#L22 assume !(1 == ~n); 34193#L25 call #t~ret9 := fibo1(~n - 1);< 34192#fibo1ENTRY ~n := #in~n; 34195#L10 assume !(~n < 1); 34206#L12 assume !(1 == ~n); 34199#L15 call #t~ret7 := fibo2(~n - 1);< 34202#fibo2ENTRY ~n := #in~n; 34203#L20 assume !(~n < 1); 34198#L22 assume !(1 == ~n); 34194#L25 call #t~ret9 := fibo1(~n - 1);< 34192#fibo1ENTRY ~n := #in~n; 34195#L10 assume !(~n < 1); 34206#L12 assume !(1 == ~n); 34199#L15 call #t~ret7 := fibo2(~n - 1);< 34202#fibo2ENTRY ~n := #in~n; 34203#L20 assume !(~n < 1); 34198#L22 assume !(1 == ~n); 34194#L25 call #t~ret9 := fibo1(~n - 1);< 34192#fibo1ENTRY ~n := #in~n; 34196#L10 assume !(~n < 1); 34247#L12 assume 1 == ~n;#res := 1; 34248#fibo1FINAL assume true; 35195#fibo1EXIT >#48#return; 35191#L25-1 call #t~ret10 := fibo1(~n - 2);< 35194#fibo1ENTRY ~n := #in~n; 35197#L10 assume ~n < 1;#res := 0; 35196#fibo1FINAL assume true; 35190#fibo1EXIT >#50#return; 35188#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35186#fibo2FINAL assume true; 35088#fibo2EXIT >#52#return; 34136#L15-1 call #t~ret8 := fibo2(~n - 2);< 35098#fibo2ENTRY ~n := #in~n; 35404#L20 assume ~n < 1;#res := 0; 35403#fibo2FINAL assume true; 35401#fibo2EXIT >#54#return; 35400#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35399#fibo1FINAL assume true; 35117#fibo1EXIT >#48#return; 35090#L25-1 [2020-11-29 18:32:15,403 INFO L796 eck$LassoCheckResult]: Loop: 35090#L25-1 call #t~ret10 := fibo1(~n - 2);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume !(1 == ~n); 35083#L15 call #t~ret7 := fibo2(~n - 1);< 35094#fibo2ENTRY ~n := #in~n; 35133#L20 assume !(~n < 1); 35129#L22 assume !(1 == ~n); 35093#L25 call #t~ret9 := fibo1(~n - 1);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume !(1 == ~n); 35083#L15 call #t~ret7 := fibo2(~n - 1);< 35094#fibo2ENTRY ~n := #in~n; 35133#L20 assume !(~n < 1); 35129#L22 assume !(1 == ~n); 35093#L25 call #t~ret9 := fibo1(~n - 1);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume !(1 == ~n); 35083#L15 call #t~ret7 := fibo2(~n - 1);< 35094#fibo2ENTRY ~n := #in~n; 35133#L20 assume !(~n < 1); 35129#L22 assume !(1 == ~n); 35093#L25 call #t~ret9 := fibo1(~n - 1);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume 1 == ~n;#res := 1; 35143#fibo1FINAL assume true; 35136#fibo1EXIT >#48#return; 34107#L25-1 call #t~ret10 := fibo1(~n - 2);< 34165#fibo1ENTRY ~n := #in~n; 34106#L10 assume ~n < 1;#res := 0; 34108#fibo1FINAL assume true; 35110#fibo1EXIT >#50#return; 35103#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35097#fibo2FINAL assume true; 35082#fibo2EXIT >#52#return; 34135#L15-1 call #t~ret8 := fibo2(~n - 2);< 35132#fibo2ENTRY ~n := #in~n; 35146#L20 assume !(~n < 1); 35144#L22 assume !(1 == ~n); 34970#L25 call #t~ret9 := fibo1(~n - 1);< 35120#fibo1ENTRY ~n := #in~n; 35160#L10 assume !(~n < 1); 35048#L12 assume !(1 == ~n); 35049#L15 call #t~ret7 := fibo2(~n - 1);< 35183#fibo2ENTRY ~n := #in~n; 35217#L20 assume !(~n < 1); 35227#L22 assume !(1 == ~n); 35221#L25 call #t~ret9 := fibo1(~n - 1);< 35224#fibo1ENTRY ~n := #in~n; 35287#L10 assume !(~n < 1); 35286#L12 assume 1 == ~n;#res := 1; 35229#fibo1FINAL assume true; 35220#fibo1EXIT >#48#return; 35203#L25-1 call #t~ret10 := fibo1(~n - 2);< 35208#fibo1ENTRY ~n := #in~n; 35280#L10 assume ~n < 1;#res := 0; 35277#fibo1FINAL assume true; 35200#fibo1EXIT >#50#return; 35199#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35198#fibo2FINAL assume true; 35182#fibo2EXIT >#52#return; 35175#L15-1 call #t~ret8 := fibo2(~n - 2);< 35180#fibo2ENTRY ~n := #in~n; 35214#L20 assume ~n < 1;#res := 0; 35179#fibo2FINAL assume true; 35174#fibo2EXIT >#54#return; 35177#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35432#fibo1FINAL assume true; 35118#fibo1EXIT >#48#return; 35090#L25-1 call #t~ret10 := fibo1(~n - 2);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume 1 == ~n;#res := 1; 35143#fibo1FINAL assume true; 35136#fibo1EXIT >#50#return; 35107#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35141#fibo2FINAL assume true; 35131#fibo2EXIT >#54#return; 35084#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35128#fibo1FINAL assume true; 35119#fibo1EXIT >#48#return; 35090#L25-1 call #t~ret10 := fibo1(~n - 2);< 35109#fibo1ENTRY ~n := #in~n; 35147#L10 assume !(~n < 1); 35145#L12 assume 1 == ~n;#res := 1; 35143#fibo1FINAL assume true; 35136#fibo1EXIT >#50#return; 35107#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 35141#fibo2FINAL assume true; 35131#fibo2EXIT >#52#return; 34135#L15-1 call #t~ret8 := fibo2(~n - 2);< 35149#fibo2ENTRY ~n := #in~n; 35413#L20 assume ~n < 1;#res := 0; 35247#fibo2FINAL assume true; 35152#fibo2EXIT >#54#return; 35154#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 35398#fibo1FINAL assume true; 35105#fibo1EXIT >#48#return; 35090#L25-1 [2020-11-29 18:32:15,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:15,404 INFO L82 PathProgramCache]: Analyzing trace with hash 50807002, now seen corresponding path program 1 times [2020-11-29 18:32:15,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:15,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578762249] [2020-11-29 18:32:15,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:15,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 18:32:15,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:15,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:32:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-29 18:32:15,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578762249] [2020-11-29 18:32:15,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598530469] [2020-11-29 18:32:15,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:15,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 18:32:15,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 28 proven. 53 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-29 18:32:16,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:16,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 24 [2020-11-29 18:32:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980688249] [2020-11-29 18:32:16,157 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:16,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:16,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1856679522, now seen corresponding path program 1 times [2020-11-29 18:32:16,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:16,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555293394] [2020-11-29 18:32:16,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-11-29 18:32:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:32:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:32:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-11-29 18:32:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-11-29 18:32:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-11-29 18:32:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,483 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 86 proven. 37 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-11-29 18:32:16,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555293394] [2020-11-29 18:32:16,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326355087] [2020-11-29 18:32:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:16,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:16,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:32:16,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 142 proven. 47 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-11-29 18:32:16,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:16,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2020-11-29 18:32:16,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950961457] [2020-11-29 18:32:16,756 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:32:16,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-29 18:32:16,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2020-11-29 18:32:16,757 INFO L87 Difference]: Start difference. First operand 1399 states and 1795 transitions. cyclomatic complexity: 410 Second operand 24 states. [2020-11-29 18:32:18,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:18,001 INFO L93 Difference]: Finished difference Result 1581 states and 1917 transitions. [2020-11-29 18:32:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-29 18:32:18,002 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1581 states and 1917 transitions. [2020-11-29 18:32:18,016 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 141 [2020-11-29 18:32:18,028 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1581 states to 859 states and 1021 transitions. [2020-11-29 18:32:18,028 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 476 [2020-11-29 18:32:18,029 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 476 [2020-11-29 18:32:18,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 859 states and 1021 transitions. [2020-11-29 18:32:18,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:18,030 INFO L691 BuchiCegarLoop]: Abstraction has 859 states and 1021 transitions. [2020-11-29 18:32:18,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states and 1021 transitions. [2020-11-29 18:32:18,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 738. [2020-11-29 18:32:18,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-11-29 18:32:18,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 882 transitions. [2020-11-29 18:32:18,060 INFO L714 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-11-29 18:32:18,060 INFO L594 BuchiCegarLoop]: Abstraction has 738 states and 882 transitions. [2020-11-29 18:32:18,060 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 18:32:18,060 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 738 states and 882 transitions. [2020-11-29 18:32:18,065 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 108 [2020-11-29 18:32:18,065 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:18,065 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:18,067 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:18,067 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:18,067 INFO L794 eck$LassoCheckResult]: Stem: 38127#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); 38123#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 38100#L39 call main_#t~ret11 := fibo1(main_~x~0);< 38101#fibo1ENTRY ~n := #in~n; 38213#L10 assume !(~n < 1); 38212#L12 assume !(1 == ~n); 38208#L15 call #t~ret7 := fibo2(~n - 1);< 38211#fibo2ENTRY ~n := #in~n; 38210#L20 assume !(~n < 1); 38209#L22 assume !(1 == ~n); 38204#L25 call #t~ret9 := fibo1(~n - 1);< 38207#fibo1ENTRY ~n := #in~n; 38206#L10 assume !(~n < 1); 38205#L12 assume !(1 == ~n); 38200#L15 call #t~ret7 := fibo2(~n - 1);< 38203#fibo2ENTRY ~n := #in~n; 38202#L20 assume !(~n < 1); 38201#L22 assume !(1 == ~n); 38177#L25 call #t~ret9 := fibo1(~n - 1);< 38178#fibo1ENTRY ~n := #in~n; 38198#L10 assume !(~n < 1); 38195#L12 assume !(1 == ~n); 38173#L15 call #t~ret7 := fibo2(~n - 1);< 38186#fibo2ENTRY ~n := #in~n; 38182#L20 assume !(~n < 1); 38180#L22 assume !(1 == ~n); 38176#L25 call #t~ret9 := fibo1(~n - 1);< 38178#fibo1ENTRY ~n := #in~n; 38197#L10 assume !(~n < 1); 38193#L12 assume 1 == ~n;#res := 1; 38194#fibo1FINAL assume true; 38397#fibo1EXIT >#48#return; 38391#L25-1 call #t~ret10 := fibo1(~n - 2);< 38392#fibo1ENTRY ~n := #in~n; 38620#L10 assume ~n < 1;#res := 0; 38619#fibo1FINAL assume true; 38390#fibo1EXIT >#50#return; 38388#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 38387#fibo2FINAL assume true; 38385#fibo2EXIT >#52#return; 38368#L15-1 call #t~ret8 := fibo2(~n - 2);< 38382#fibo2ENTRY ~n := #in~n; 38606#L20 assume !(~n < 1); 38604#L22 assume 1 == ~n;#res := 1; 38603#fibo2FINAL assume true; 38597#fibo2EXIT >#54#return; 38595#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 38592#fibo1FINAL assume true; 38364#fibo1EXIT >#48#return; 38346#L25-1 call #t~ret10 := fibo1(~n - 2);< 38351#fibo1ENTRY [2020-11-29 18:32:18,067 INFO L796 eck$LassoCheckResult]: Loop: 38351#fibo1ENTRY ~n := #in~n; 38617#L10 assume !(~n < 1); 38374#L12 assume !(1 == ~n); 38367#L15 call #t~ret7 := fibo2(~n - 1);< 38373#fibo2ENTRY ~n := #in~n; 38409#L20 assume !(~n < 1); 38404#L22 assume !(1 == ~n); 38348#L25 call #t~ret9 := fibo1(~n - 1);< 38357#fibo1ENTRY ~n := #in~n; 38377#L10 assume !(~n < 1); 38374#L12 assume !(1 == ~n); 38367#L15 call #t~ret7 := fibo2(~n - 1);< 38373#fibo2ENTRY ~n := #in~n; 38409#L20 assume !(~n < 1); 38404#L22 assume 1 == ~n;#res := 1; 38405#fibo2FINAL assume true; 38699#fibo2EXIT >#52#return; 38638#L15-1 call #t~ret8 := fibo2(~n - 2);< 38639#fibo2ENTRY ~n := #in~n; 38694#L20 assume ~n < 1;#res := 0; 38645#fibo2FINAL assume true; 38637#fibo2EXIT >#54#return; 38635#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 38634#fibo1FINAL assume true; 38342#fibo1EXIT >#48#return; 38344#L25-1 call #t~ret10 := fibo1(~n - 2);< 38351#fibo1ENTRY [2020-11-29 18:32:18,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:18,068 INFO L82 PathProgramCache]: Analyzing trace with hash 482791451, now seen corresponding path program 2 times [2020-11-29 18:32:18,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:18,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191164680] [2020-11-29 18:32:18,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:18,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:18,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-11-29 18:32:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:18,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:18,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:18,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:18,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:32:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 18:32:18,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191164680] [2020-11-29 18:32:18,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21845586] [2020-11-29 18:32:18,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:18,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:32:18,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:32:18,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:32:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-29 18:32:18,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:18,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-11-29 18:32:18,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337916030] [2020-11-29 18:32:18,453 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:18,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1552659165, now seen corresponding path program 2 times [2020-11-29 18:32:18,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:18,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096532526] [2020-11-29 18:32:18,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:18,459 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:18,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:18,463 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:18,465 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:32:18,897 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:18,897 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:18,897 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:18,897 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:18,898 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:32:18,898 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:18,898 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:18,898 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:18,898 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration10_Loop [2020-11-29 18:32:18,898 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:18,898 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:18,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,933 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:18,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,038 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:19,038 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 96 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 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,044 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:19,044 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:19,047 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:19,047 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 97 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 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:19,077 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 98 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 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:32:19,108 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:19,204 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:32:19,207 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:19,207 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:19,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:19,207 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:19,207 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:32:19,207 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,207 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:19,207 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:19,207 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration10_Loop [2020-11-29 18:32:19,208 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:19,208 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:19,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,212 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,244 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,270 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:19,344 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:19,344 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 99 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 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,347 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:19,349 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:19,349 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:19,349 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:19,349 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:19,349 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:19,350 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:19,350 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:19,351 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 100 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 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,379 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:19,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:19,381 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:19,381 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:19,381 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:19,381 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:19,383 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:19,383 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:19,385 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:32:19,388 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:32:19,388 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 101 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 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:19,391 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:32:19,391 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:32:19,391 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:32:19,391 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_#in~n) = 1*fibo1_#in~n Supporting invariants [] [2020-11-29 18:32:19,430 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:32:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:19,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:32:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:19,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:19,614 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:19,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:19,619 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:19,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:19,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 18:32:19,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:32:19,888 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 18:32:19,889 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-29 18:32:20,310 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 873 states and 1029 transitions. Complement of second has 16 states. [2020-11-29 18:32:20,311 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 [2020-11-29 18:32:20,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 18:32:20,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 41 transitions. [2020-11-29 18:32:20,312 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 41 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-29 18:32:20,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:20,313 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:20,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:20,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:20,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:32:20,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:20,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:20,467 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:20,469 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:20,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:20,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 18:32:20,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:32:20,798 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 18:32:20,798 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-29 18:32:21,546 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 925 states and 1086 transitions. Complement of second has 39 states. [2020-11-29 18:32:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-29 18:32:21,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 18:32:21,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 56 transitions. [2020-11-29 18:32:21,549 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 56 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-29 18:32:21,549 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:21,549 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:21,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:32:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:21,709 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:21,712 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:21,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:21,717 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:21,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 18:32:21,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:32:21,988 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 10 loop predicates [2020-11-29 18:32:21,988 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-29 18:32:22,381 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1091 states and 1260 transitions. Complement of second has 15 states. [2020-11-29 18:32:22,387 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 [2020-11-29 18:32:22,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 18:32:22,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 45 transitions. [2020-11-29 18:32:22,388 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 45 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-29 18:32:22,390 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:22,391 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:22,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-29 18:32:22,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:22,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:22,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:22,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:22,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:22,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 18:32:22,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 18:32:22,842 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 18:32:22,842 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153 Second operand 12 states. [2020-11-29 18:32:23,505 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 738 states and 882 transitions. cyclomatic complexity: 153. Second operand 12 states. Result 1443 states and 1661 transitions. Complement of second has 43 states. [2020-11-29 18:32:23,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-29 18:32:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 18:32:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 60 transitions. [2020-11-29 18:32:23,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 26 letters. [2020-11-29 18:32:23,508 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:23,508 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 76 letters. Loop has 26 letters. [2020-11-29 18:32:23,509 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:23,509 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 60 transitions. Stem has 50 letters. Loop has 52 letters. [2020-11-29 18:32:23,510 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:23,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1443 states and 1661 transitions. [2020-11-29 18:32:23,539 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 188 [2020-11-29 18:32:23,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1443 states to 1051 states and 1245 transitions. [2020-11-29 18:32:23,553 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 439 [2020-11-29 18:32:23,554 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 498 [2020-11-29 18:32:23,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1051 states and 1245 transitions. [2020-11-29 18:32:23,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:23,554 INFO L691 BuchiCegarLoop]: Abstraction has 1051 states and 1245 transitions. [2020-11-29 18:32:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states and 1245 transitions. [2020-11-29 18:32:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 951. [2020-11-29 18:32:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 951 states. [2020-11-29 18:32:23,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1110 transitions. [2020-11-29 18:32:23,593 INFO L714 BuchiCegarLoop]: Abstraction has 951 states and 1110 transitions. [2020-11-29 18:32:23,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:23,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-29 18:32:23,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-11-29 18:32:23,594 INFO L87 Difference]: Start difference. First operand 951 states and 1110 transitions. Second operand 18 states. [2020-11-29 18:32:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:24,432 INFO L93 Difference]: Finished difference Result 1468 states and 1837 transitions. [2020-11-29 18:32:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-29 18:32:24,433 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1468 states and 1837 transitions. [2020-11-29 18:32:24,447 INFO L131 ngComponentsAnalysis]: Automaton has 10 accepting balls. 288 [2020-11-29 18:32:24,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1468 states to 1398 states and 1727 transitions. [2020-11-29 18:32:24,467 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 618 [2020-11-29 18:32:24,468 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 618 [2020-11-29 18:32:24,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1398 states and 1727 transitions. [2020-11-29 18:32:24,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:24,469 INFO L691 BuchiCegarLoop]: Abstraction has 1398 states and 1727 transitions. [2020-11-29 18:32:24,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states and 1727 transitions. [2020-11-29 18:32:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1143. [2020-11-29 18:32:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1143 states. [2020-11-29 18:32:24,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1395 transitions. [2020-11-29 18:32:24,511 INFO L714 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-11-29 18:32:24,511 INFO L594 BuchiCegarLoop]: Abstraction has 1143 states and 1395 transitions. [2020-11-29 18:32:24,511 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 18:32:24,512 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1143 states and 1395 transitions. [2020-11-29 18:32:24,518 INFO L131 ngComponentsAnalysis]: Automaton has 7 accepting balls. 212 [2020-11-29 18:32:24,518 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:24,518 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:24,520 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:24,520 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:24,521 INFO L794 eck$LassoCheckResult]: Stem: 46989#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); 46988#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 46953#L39 call main_#t~ret11 := fibo1(main_~x~0);< 46954#fibo1ENTRY ~n := #in~n; 47029#L10 assume !(~n < 1); 47027#L12 assume !(1 == ~n); 47024#L15 call #t~ret7 := fibo2(~n - 1);< 47025#fibo2ENTRY ~n := #in~n; 47040#L20 assume !(~n < 1); 47038#L22 assume !(1 == ~n); 47035#L25 call #t~ret9 := fibo1(~n - 1);< 47036#fibo1ENTRY ~n := #in~n; 47103#L10 assume !(~n < 1); 47100#L12 assume !(1 == ~n); 47052#L15 call #t~ret7 := fibo2(~n - 1);< 47053#fibo2ENTRY ~n := #in~n; 47158#L20 assume !(~n < 1); 47153#L22 assume !(1 == ~n); 47097#L25 call #t~ret9 := fibo1(~n - 1);< 47099#fibo1ENTRY ~n := #in~n; 47454#L10 assume !(~n < 1); 47504#L12 assume !(1 == ~n); 47149#L15 call #t~ret7 := fibo2(~n - 1);< 47150#fibo2ENTRY ~n := #in~n; 47448#L20 assume !(~n < 1); 47447#L22 assume !(1 == ~n); 47098#L25 call #t~ret9 := fibo1(~n - 1);< 47099#fibo1ENTRY ~n := #in~n; 47452#L10 assume !(~n < 1); 47450#L12 assume 1 == ~n;#res := 1; 47449#fibo1FINAL assume true; 47446#fibo1EXIT >#48#return; 47444#L25-1 call #t~ret10 := fibo1(~n - 2);< 47445#fibo1ENTRY ~n := #in~n; 47455#L10 assume ~n < 1;#res := 0; 47453#fibo1FINAL assume true; 47443#fibo1EXIT >#50#return; 47442#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 47439#fibo2FINAL assume true; 47438#fibo2EXIT >#52#return; 47183#L15-1 call #t~ret8 := fibo2(~n - 2);< 47437#fibo2ENTRY ~n := #in~n; 47296#L20 assume !(~n < 1); 47292#L22 assume !(1 == ~n); 47250#L25 call #t~ret9 := fibo1(~n - 1);< 47251#fibo1ENTRY ~n := #in~n; 47413#L10 assume !(~n < 1); 47411#L12 assume !(1 == ~n); 46984#L15 call #t~ret7 := fibo2(~n - 1);< 47409#fibo2ENTRY ~n := #in~n; 47418#L20 assume !(~n < 1); 48023#L22 assume !(1 == ~n); 46999#L25 [2020-11-29 18:32:24,521 INFO L796 eck$LassoCheckResult]: Loop: 46999#L25 call #t~ret9 := fibo1(~n - 1);< 48011#fibo1ENTRY ~n := #in~n; 48046#L10 assume !(~n < 1); 48045#L12 assume !(1 == ~n); 46934#L15 call #t~ret7 := fibo2(~n - 1);< 48044#fibo2ENTRY ~n := #in~n; 48043#L20 assume !(~n < 1); 48040#L22 assume !(1 == ~n); 48028#L25 call #t~ret9 := fibo1(~n - 1);< 48029#fibo1ENTRY ~n := #in~n; 48035#L10 assume !(~n < 1); 48033#L12 assume 1 == ~n;#res := 1; 48031#fibo1FINAL assume true; 48027#fibo1EXIT >#48#return; 47962#L25-1 call #t~ret10 := fibo1(~n - 2);< 47963#fibo1ENTRY ~n := #in~n; 48022#L10 assume ~n < 1;#res := 0; 48009#fibo1FINAL assume true; 48021#fibo1EXIT >#50#return; 46931#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 46936#fibo2FINAL assume true; 46949#fibo2EXIT >#52#return; 46933#L15-1 call #t~ret8 := fibo2(~n - 2);< 48070#fibo2ENTRY ~n := #in~n; 48069#L20 assume !(~n < 1); 46948#L22 assume !(1 == ~n); 46944#L25 call #t~ret9 := fibo1(~n - 1);< 46980#fibo1ENTRY ~n := #in~n; 46943#L10 assume !(~n < 1); 46945#L12 assume !(1 == ~n); 46981#L15 call #t~ret7 := fibo2(~n - 1);< 46991#fibo2ENTRY ~n := #in~n; 47418#L20 assume !(~n < 1); 48023#L22 assume !(1 == ~n); 46999#L25 [2020-11-29 18:32:24,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:24,522 INFO L82 PathProgramCache]: Analyzing trace with hash -2135425092, now seen corresponding path program 1 times [2020-11-29 18:32:24,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:24,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854486797] [2020-11-29 18:32:24,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:24,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 18:32:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:24,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:24,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:24,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:24,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:32:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854486797] [2020-11-29 18:32:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462707750] [2020-11-29 18:32:24,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:24,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-29 18:32:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:24,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:32:24,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:24,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-11-29 18:32:24,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605277836] [2020-11-29 18:32:24,940 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:24,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:24,941 INFO L82 PathProgramCache]: Analyzing trace with hash 307692230, now seen corresponding path program 1 times [2020-11-29 18:32:24,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:24,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954835727] [2020-11-29 18:32:24,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:25,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-11-29 18:32:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:25,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:25,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:32:25,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954835727] [2020-11-29 18:32:25,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722266524] [2020-11-29 18:32:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:25,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:25,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:32:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:32:25,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:25,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 14 [2020-11-29 18:32:25,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305493713] [2020-11-29 18:32:25,350 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:32:25,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:25,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-29 18:32:25,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-11-29 18:32:25,351 INFO L87 Difference]: Start difference. First operand 1143 states and 1395 transitions. cyclomatic complexity: 264 Second operand 14 states. [2020-11-29 18:32:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:25,730 INFO L93 Difference]: Finished difference Result 962 states and 1134 transitions. [2020-11-29 18:32:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:32:25,732 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 962 states and 1134 transitions. [2020-11-29 18:32:25,740 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-11-29 18:32:25,750 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 962 states to 855 states and 1010 transitions. [2020-11-29 18:32:25,751 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 404 [2020-11-29 18:32:25,751 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 404 [2020-11-29 18:32:25,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 855 states and 1010 transitions. [2020-11-29 18:32:25,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:25,752 INFO L691 BuchiCegarLoop]: Abstraction has 855 states and 1010 transitions. [2020-11-29 18:32:25,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states and 1010 transitions. [2020-11-29 18:32:25,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 809. [2020-11-29 18:32:25,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 809 states. [2020-11-29 18:32:25,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 955 transitions. [2020-11-29 18:32:25,786 INFO L714 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-11-29 18:32:25,786 INFO L594 BuchiCegarLoop]: Abstraction has 809 states and 955 transitions. [2020-11-29 18:32:25,786 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-29 18:32:25,786 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 809 states and 955 transitions. [2020-11-29 18:32:25,790 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 144 [2020-11-29 18:32:25,790 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:25,790 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:25,791 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:25,791 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:25,791 INFO L794 eck$LassoCheckResult]: Stem: 49453#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); 49449#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 49421#L39 call main_#t~ret11 := fibo1(main_~x~0);< 49422#fibo1ENTRY ~n := #in~n; 49545#L10 assume !(~n < 1); 49544#L12 assume !(1 == ~n); 49535#L15 call #t~ret7 := fibo2(~n - 1);< 49541#fibo2ENTRY ~n := #in~n; 49539#L20 assume !(~n < 1); 49537#L22 assume !(1 == ~n); 49529#L25 call #t~ret9 := fibo1(~n - 1);< 49533#fibo1ENTRY ~n := #in~n; 49531#L10 assume !(~n < 1); 49530#L12 assume !(1 == ~n); 49515#L15 call #t~ret7 := fibo2(~n - 1);< 49524#fibo2ENTRY ~n := #in~n; 49522#L20 assume !(~n < 1); 49516#L22 assume !(1 == ~n); 49493#L25 call #t~ret9 := fibo1(~n - 1);< 49494#fibo1ENTRY ~n := #in~n; 49514#L10 assume !(~n < 1); 49513#L12 assume !(1 == ~n); 49488#L15 call #t~ret7 := fibo2(~n - 1);< 49510#fibo2ENTRY ~n := #in~n; 49504#L20 assume !(~n < 1); 49499#L22 assume !(1 == ~n); 49492#L25 call #t~ret9 := fibo1(~n - 1);< 49494#fibo1ENTRY ~n := #in~n; 49512#L10 assume !(~n < 1); 49511#L12 assume !(1 == ~n); 49508#L15 call #t~ret7 := fibo2(~n - 1);< 49509#fibo2ENTRY ~n := #in~n; 49540#L20 assume !(~n < 1); 49538#L22 assume 1 == ~n;#res := 1; 49521#fibo2FINAL assume true; 49507#fibo2EXIT >#52#return; 49502#L15-1 call #t~ret8 := fibo2(~n - 2);< 49503#fibo2ENTRY ~n := #in~n; 49520#L20 assume ~n < 1;#res := 0; 49506#fibo2FINAL assume true; 49501#fibo2EXIT >#54#return; 49498#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 49497#fibo1FINAL assume true; 49491#fibo1EXIT >#48#return; 49482#L25-1 call #t~ret10 := fibo1(~n - 2);< 49490#fibo1ENTRY ~n := #in~n; 49894#L10 assume !(~n < 1); 49893#L12 assume !(1 == ~n); 49436#L15 call #t~ret7 := fibo2(~n - 1);< 49891#fibo2ENTRY ~n := #in~n; 49902#L20 assume !(~n < 1); 49900#L22 assume !(1 == ~n); 49397#L25 [2020-11-29 18:32:25,792 INFO L796 eck$LassoCheckResult]: Loop: 49397#L25 call #t~ret9 := fibo1(~n - 1);< 49437#fibo1ENTRY ~n := #in~n; 49396#L10 assume !(~n < 1); 49398#L12 assume !(1 == ~n); 49432#L15 call #t~ret7 := fibo2(~n - 1);< 49451#fibo2ENTRY ~n := #in~n; 49454#L20 assume !(~n < 1); 49475#L22 assume !(1 == ~n); 49397#L25 [2020-11-29 18:32:25,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:25,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1830537364, now seen corresponding path program 2 times [2020-11-29 18:32:25,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:25,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546830361] [2020-11-29 18:32:25,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:25,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:26,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-11-29 18:32:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:26,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:26,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:26,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:26,045 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:32:26,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546830361] [2020-11-29 18:32:26,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973718768] [2020-11-29 18:32:26,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:26,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:32:26,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:32:26,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:32:26,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:26,181 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 18:32:26,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:26,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-11-29 18:32:26,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066884034] [2020-11-29 18:32:26,185 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:26,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:26,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2095272006, now seen corresponding path program 3 times [2020-11-29 18:32:26,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:26,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197371934] [2020-11-29 18:32:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:26,191 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:26,193 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:26,195 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:32:26,364 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:26,364 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:26,364 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:26,365 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:26,365 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:32:26,365 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:26,365 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:26,365 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:26,365 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration12_Loop [2020-11-29 18:32:26,365 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:26,365 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:26,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,398 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,410 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,413 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,421 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:26,549 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:26,549 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 105 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 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:26,554 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:26,555 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:26,558 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:32:26,558 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 106 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 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:26,585 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:26,586 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:32:26,657 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:32:26,657 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,677 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:32:34,680 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:34,680 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:34,680 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:34,680 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:34,680 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:32:34,680 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,680 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:34,681 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:34,681 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration12_Loop [2020-11-29 18:32:34,681 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:34,681 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:34,682 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:34,822 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:34,822 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 108 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 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,825 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:34,826 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:34,826 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:34,826 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:34,826 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:34,827 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:34,827 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:34,827 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:34,828 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 109 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 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,858 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:34,859 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:34,859 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:34,859 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:34,859 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:34,860 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:34,860 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:34,860 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:34,861 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 110 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 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,892 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 [2020-11-29 18:32:34,894 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:34,894 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:34,894 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:34,894 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:34,894 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:34,895 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:34,895 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:34,896 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 111 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 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,924 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:34,926 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:34,926 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:34,926 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:34,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:34,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:34,927 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:34,927 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:34,929 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:32:34,957 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,959 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:34,959 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:34,959 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:34,959 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:34,959 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:34,960 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:34,960 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:34,961 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:32:34,990 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:34,992 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:34,993 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:34,993 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:34,993 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:34,993 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:34,994 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:34,994 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:34,998 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 114 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 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:35,027 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:35,028 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:35,028 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:35,029 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:35,029 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:35,029 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:35,029 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:35,029 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:35,031 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:32:35,062 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:35,064 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:35,064 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:35,064 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:35,064 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:35,064 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:35,065 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:35,065 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:35,066 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 116 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:35,097 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:35,098 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:35,098 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:35,099 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:35,099 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:35,099 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:35,100 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:35,100 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:35,103 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:32:35,106 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:32:35,106 INFO L444 ModelExtractionUtils]: 2 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 117 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 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:35,108 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:32:35,108 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:32:35,109 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:32:35,109 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo2_~n) = 1*fibo2_~n Supporting invariants [] [2020-11-29 18:32:35,136 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:32:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 18:32:35,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:35,265 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:35,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:35,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:35,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:35,405 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 [2020-11-29 18:32:35,405 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-11-29 18:32:35,594 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 830 states and 977 transitions. Complement of second has 20 states. [2020-11-29 18:32:35,595 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 [2020-11-29 18:32:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:32:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 21 transitions. [2020-11-29 18:32:35,596 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 21 transitions. Stem has 52 letters. Loop has 8 letters. [2020-11-29 18:32:35,596 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:35,596 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:35,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:35,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 18:32:35,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:35,760 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:35,762 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:35,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:35,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:35,876 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 [2020-11-29 18:32:35,876 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-11-29 18:32:36,121 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 836 states and 983 transitions. Complement of second has 22 states. [2020-11-29 18:32:36,122 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 [2020-11-29 18:32:36,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:32:36,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 24 transitions. [2020-11-29 18:32:36,124 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 24 transitions. Stem has 52 letters. Loop has 8 letters. [2020-11-29 18:32:36,124 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:36,124 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:36,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:36,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-29 18:32:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:36,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:36,281 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:36,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:36,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:36,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:36,476 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 [2020-11-29 18:32:36,476 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155 Second operand 8 states. [2020-11-29 18:32:36,732 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 809 states and 955 transitions. cyclomatic complexity: 155. Second operand 8 states. Result 1195 states and 1399 transitions. Complement of second has 32 states. [2020-11-29 18:32:36,733 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 [2020-11-29 18:32:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:32:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-29 18:32:36,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 8 letters. [2020-11-29 18:32:36,734 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:36,734 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 60 letters. Loop has 8 letters. [2020-11-29 18:32:36,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:36,735 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 52 letters. Loop has 16 letters. [2020-11-29 18:32:36,735 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:36,736 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1195 states and 1399 transitions. [2020-11-29 18:32:36,745 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 156 [2020-11-29 18:32:36,757 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1195 states to 848 states and 1007 transitions. [2020-11-29 18:32:36,757 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 346 [2020-11-29 18:32:36,758 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 378 [2020-11-29 18:32:36,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 848 states and 1007 transitions. [2020-11-29 18:32:36,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:36,759 INFO L691 BuchiCegarLoop]: Abstraction has 848 states and 1007 transitions. [2020-11-29 18:32:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states and 1007 transitions. [2020-11-29 18:32:36,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 816. [2020-11-29 18:32:36,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 816 states. [2020-11-29 18:32:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 960 transitions. [2020-11-29 18:32:36,790 INFO L714 BuchiCegarLoop]: Abstraction has 816 states and 960 transitions. [2020-11-29 18:32:36,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:36,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 18:32:36,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-29 18:32:36,791 INFO L87 Difference]: Start difference. First operand 816 states and 960 transitions. Second operand 20 states. [2020-11-29 18:32:37,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:37,423 INFO L93 Difference]: Finished difference Result 599 states and 699 transitions. [2020-11-29 18:32:37,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-29 18:32:37,424 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 599 states and 699 transitions. [2020-11-29 18:32:37,428 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-29 18:32:37,435 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 599 states to 585 states and 682 transitions. [2020-11-29 18:32:37,436 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 297 [2020-11-29 18:32:37,436 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-11-29 18:32:37,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 585 states and 682 transitions. [2020-11-29 18:32:37,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:37,437 INFO L691 BuchiCegarLoop]: Abstraction has 585 states and 682 transitions. [2020-11-29 18:32:37,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states and 682 transitions. [2020-11-29 18:32:37,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 571. [2020-11-29 18:32:37,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-11-29 18:32:37,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 667 transitions. [2020-11-29 18:32:37,456 INFO L714 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-11-29 18:32:37,456 INFO L594 BuchiCegarLoop]: Abstraction has 571 states and 667 transitions. [2020-11-29 18:32:37,457 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-29 18:32:37,457 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 571 states and 667 transitions. [2020-11-29 18:32:37,460 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-29 18:32:37,460 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:32:37,460 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:32:37,461 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 7, 7, 6, 6, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:37,461 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 18:32:37,462 INFO L794 eck$LassoCheckResult]: Stem: 55437#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); 55433#L-1 havoc main_#res;havoc main_#t~ret11, main_~x~0, main_~result~0;main_~x~0 := 8; 55405#L39 call main_#t~ret11 := fibo1(main_~x~0);< 55406#fibo1ENTRY ~n := #in~n; 55498#L10 assume !(~n < 1); 55496#L12 assume !(1 == ~n); 55489#L15 call #t~ret7 := fibo2(~n - 1);< 55495#fibo2ENTRY ~n := #in~n; 55523#L20 assume !(~n < 1); 55522#L22 assume !(1 == ~n); 55488#L25 call #t~ret9 := fibo1(~n - 1);< 55490#fibo1ENTRY ~n := #in~n; 55882#L10 assume !(~n < 1); 55877#L12 assume !(1 == ~n); 55375#L15 call #t~ret7 := fibo2(~n - 1);< 55564#fibo2ENTRY ~n := #in~n; 55812#L20 assume !(~n < 1); 55811#L22 assume !(1 == ~n); 55548#L25 call #t~ret9 := fibo1(~n - 1);< 55550#fibo1ENTRY ~n := #in~n; 55595#L10 assume !(~n < 1); 55593#L12 assume !(1 == ~n); 55586#L15 call #t~ret7 := fibo2(~n - 1);< 55587#fibo2ENTRY ~n := #in~n; 55658#L20 assume !(~n < 1); 55653#L22 assume !(1 == ~n); 55549#L25 call #t~ret9 := fibo1(~n - 1);< 55550#fibo1ENTRY ~n := #in~n; 55599#L10 assume !(~n < 1); 55698#L12 assume !(1 == ~n); 55649#L15 call #t~ret7 := fibo2(~n - 1);< 55650#fibo2ENTRY ~n := #in~n; 55657#L20 assume !(~n < 1); 55652#L22 assume 1 == ~n;#res := 1; 55651#fibo2FINAL assume true; 55648#fibo2EXIT >#52#return; 55645#L15-1 call #t~ret8 := fibo2(~n - 2);< 55646#fibo2ENTRY ~n := #in~n; 55682#L20 assume ~n < 1;#res := 0; 55656#fibo2FINAL assume true; 55644#fibo2EXIT >#54#return; 55642#L15-2 #res := #t~ret7 + #t~ret8;havoc #t~ret8;havoc #t~ret7; 55641#fibo1FINAL assume true; 55631#fibo1EXIT >#48#return; 55597#L25-1 call #t~ret10 := fibo1(~n - 2);< 55598#fibo1ENTRY ~n := #in~n; 55634#L10 assume !(~n < 1); 55632#L12 assume 1 == ~n;#res := 1; 55628#fibo1FINAL assume true; 55596#fibo1EXIT >#50#return; 55594#L25-2 #res := #t~ret9 + #t~ret10;havoc #t~ret10;havoc #t~ret9; 55592#fibo2FINAL assume true; 55585#fibo2EXIT >#52#return; 55426#L15-1 call #t~ret8 := fibo2(~n - 2);< 55579#fibo2ENTRY ~n := #in~n; 55578#L20 assume !(~n < 1); 55577#L22 assume !(1 == ~n); 55542#L25 call #t~ret9 := fibo1(~n - 1);< 55544#fibo1ENTRY ~n := #in~n; 55667#L10 assume !(~n < 1); 55662#L12 assume !(1 == ~n); 55655#L15 call #t~ret7 := fibo2(~n - 1);< 55660#fibo2ENTRY ~n := #in~n; 55743#L20 assume !(~n < 1); 55741#L22 assume !(1 == ~n); 55601#L25 call #t~ret9 := fibo1(~n - 1);< 55610#fibo1ENTRY ~n := #in~n; 55671#L10 assume !(~n < 1); 55670#L12 assume !(1 == ~n); 55416#L15 [2020-11-29 18:32:37,462 INFO L796 eck$LassoCheckResult]: Loop: 55416#L15 call #t~ret7 := fibo2(~n - 1);< 55669#fibo2ENTRY ~n := #in~n; 55678#L20 assume !(~n < 1); 55788#L22 assume !(1 == ~n); 55602#L25 call #t~ret9 := fibo1(~n - 1);< 55610#fibo1ENTRY ~n := #in~n; 55671#L10 assume !(~n < 1); 55670#L12 assume !(1 == ~n); 55416#L15 [2020-11-29 18:32:37,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash 265386094, now seen corresponding path program 2 times [2020-11-29 18:32:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:37,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496575369] [2020-11-29 18:32:37,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:37,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:37,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-29 18:32:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:37,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:37,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-29 18:32:37,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:37,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-29 18:32:37,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:37,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-11-29 18:32:37,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:37,782 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 18:32:37,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496575369] [2020-11-29 18:32:37,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917540069] [2020-11-29 18:32:37,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:32:37,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:32:37,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:32:37,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-29 18:32:37,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:37,942 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 92 proven. 39 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 18:32:37,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:32:37,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 20 [2020-11-29 18:32:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891075228] [2020-11-29 18:32:37,944 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:32:37,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:37,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1544065082, now seen corresponding path program 4 times [2020-11-29 18:32:37,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:32:37,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156685609] [2020-11-29 18:32:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:32:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:37,948 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:32:37,950 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:32:37,952 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:32:38,160 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:38,160 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:38,160 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:38,160 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:38,160 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:32:38,160 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:38,160 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:38,160 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:38,161 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration13_Loop [2020-11-29 18:32:38,161 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:38,161 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:38,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,181 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,185 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:38,305 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:38,306 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 119 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 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:38,308 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:32:38,309 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 120 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 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:38,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:32:38,342 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:32:40,078 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:32:40,080 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:32:40,080 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:32:40,080 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:32:40,081 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:32:40,081 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:32:40,081 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,081 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:32:40,081 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:32:40,081 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_2calls_8-1.c_Iteration13_Loop [2020-11-29 18:32:40,081 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:32:40,081 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:32:40,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,090 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:32:40,204 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:32:40,204 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 121 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 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,208 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,210 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,210 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,210 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,210 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,210 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,211 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,211 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,212 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 122 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 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,241 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,243 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,243 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,243 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,243 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,243 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,244 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,244 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,246 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 123 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 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,275 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,276 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,276 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,277 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,277 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,277 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,277 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,277 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,278 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 124 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 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,306 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,308 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,308 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,308 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,308 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,308 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,309 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,309 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,310 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 125 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 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,357 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,358 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,358 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,359 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,359 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,359 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,359 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,359 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,361 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 126 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 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,393 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,393 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,394 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 127 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 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,426 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,428 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,428 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,428 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,428 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,428 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,428 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,428 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,430 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 128 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 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,462 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:32:40,463 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,464 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,464 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,464 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,464 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,464 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,464 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,466 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 129 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 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,495 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 [2020-11-29 18:32:40,496 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:32:40,497 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:32:40,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:32:40,497 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:32:40,497 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:32:40,498 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:32:40,498 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:32:40,501 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:32:40,505 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:32:40,505 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_e52e92e4-e922-4bd2-9f2f-101644599bd4/bin/uautomizer/z3 Starting monitored process 130 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 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:32:40,508 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:32:40,508 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:32:40,508 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:32:40,508 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo1_~n) = 1*fibo1_~n Supporting invariants [] [2020-11-29 18:32:40,534 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:32:40,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:40,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:32:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:40,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:40,724 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:40,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:40,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:40,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:40,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:40,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:40,848 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 [2020-11-29 18:32:40,848 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-11-29 18:32:41,044 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 19 states. [2020-11-29 18:32:41,045 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 [2020-11-29 18:32:41,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:32:41,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 20 transitions. [2020-11-29 18:32:41,047 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 20 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-29 18:32:41,047 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:41,047 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:41,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:32:41,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:41,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,228 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:41,352 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 [2020-11-29 18:32:41,352 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-11-29 18:32:41,605 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 601 states and 698 transitions. Complement of second has 21 states. [2020-11-29 18:32:41,606 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 [2020-11-29 18:32:41,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:32:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 19 transitions. [2020-11-29 18:32:41,608 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 19 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-29 18:32:41,609 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:41,609 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:32:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:32:41,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-29 18:32:41,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:41,807 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,810 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 18:32:41,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:32:41,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:32:41,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:32:41,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:32:41,937 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 [2020-11-29 18:32:41,937 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102 Second operand 8 states. [2020-11-29 18:32:42,138 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 571 states and 667 transitions. cyclomatic complexity: 102. Second operand 8 states. Result 867 states and 975 transitions. Complement of second has 33 states. [2020-11-29 18:32:42,145 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 [2020-11-29 18:32:42,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:32:42,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 43 transitions. [2020-11-29 18:32:42,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 8 letters. [2020-11-29 18:32:42,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:42,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 77 letters. Loop has 8 letters. [2020-11-29 18:32:42,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:42,150 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 43 transitions. Stem has 69 letters. Loop has 16 letters. [2020-11-29 18:32:42,150 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:32:42,151 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 867 states and 975 transitions. [2020-11-29 18:32:42,157 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-29 18:32:42,164 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 867 states to 598 states and 691 transitions. [2020-11-29 18:32:42,164 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 281 [2020-11-29 18:32:42,165 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 311 [2020-11-29 18:32:42,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 598 states and 691 transitions. [2020-11-29 18:32:42,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:32:42,166 INFO L691 BuchiCegarLoop]: Abstraction has 598 states and 691 transitions. [2020-11-29 18:32:42,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 598 states and 691 transitions. [2020-11-29 18:32:42,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 598 to 591. [2020-11-29 18:32:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2020-11-29 18:32:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 683 transitions. [2020-11-29 18:32:42,185 INFO L714 BuchiCegarLoop]: Abstraction has 591 states and 683 transitions. [2020-11-29 18:32:42,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:32:42,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-29 18:32:42,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-11-29 18:32:42,186 INFO L87 Difference]: Start difference. First operand 591 states and 683 transitions. Second operand 20 states. [2020-11-29 18:32:42,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:32:42,679 INFO L93 Difference]: Finished difference Result 605 states and 685 transitions. [2020-11-29 18:32:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-29 18:32:42,684 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 605 states and 685 transitions. [2020-11-29 18:32:42,689 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 18:32:42,690 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 605 states to 0 states and 0 transitions. [2020-11-29 18:32:42,690 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 18:32:42,690 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 18:32:42,690 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 18:32:42,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:32:42,691 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:32:42,691 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:32:42,691 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 18:32:42,691 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-11-29 18:32:42,691 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 18:32:42,691 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 18:32:42,692 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 18:32:42,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 06:32:42 BoogieIcfgContainer [2020-11-29 18:32:42,699 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 18:32:42,700 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:32:42,700 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:32:42,701 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:32:42,701 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:31:49" (3/4) ... [2020-11-29 18:32:42,705 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 18:32:42,705 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:32:42,707 INFO L168 Benchmark]: Toolchain (without parser) took 54458.40 ms. Allocated memory was 86.0 MB in the beginning and 343.9 MB in the end (delta: 257.9 MB). Free memory was 55.2 MB in the beginning and 182.7 MB in the end (delta: -127.5 MB). Peak memory consumption was 130.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:32:42,708 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 69.2 MB. Free memory was 44.6 MB in the beginning and 44.6 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:32:42,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.82 ms. Allocated memory is still 86.0 MB. Free memory was 55.1 MB in the beginning and 65.5 MB in the end (delta: -10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 18:32:42,709 INFO L168 Benchmark]: Boogie Procedure Inliner took 37.26 ms. Allocated memory is still 86.0 MB. Free memory was 65.5 MB in the beginning and 64.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:32:42,709 INFO L168 Benchmark]: Boogie Preprocessor took 20.94 ms. Allocated memory is still 86.0 MB. Free memory was 64.2 MB in the beginning and 63.4 MB in the end (delta: 829.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:32:42,710 INFO L168 Benchmark]: RCFGBuilder took 680.14 ms. Allocated memory is still 86.0 MB. Free memory was 63.0 MB in the beginning and 50.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-11-29 18:32:42,710 INFO L168 Benchmark]: BuchiAutomizer took 53340.69 ms. Allocated memory was 86.0 MB in the beginning and 343.9 MB in the end (delta: 257.9 MB). Free memory was 50.8 MB in the beginning and 183.8 MB in the end (delta: -133.0 MB). Peak memory consumption was 126.8 MB. Max. memory is 16.1 GB. [2020-11-29 18:32:42,711 INFO L168 Benchmark]: Witness Printer took 5.19 ms. Allocated memory is still 343.9 MB. Free memory was 183.8 MB in the beginning and 182.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:32:42,714 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 69.2 MB. Free memory was 44.6 MB in the beginning and 44.6 MB in the end (delta: 29.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 362.82 ms. Allocated memory is still 86.0 MB. Free memory was 55.1 MB in the beginning and 65.5 MB in the end (delta: -10.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 37.26 ms. Allocated memory is still 86.0 MB. Free memory was 65.5 MB in the beginning and 64.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.94 ms. Allocated memory is still 86.0 MB. Free memory was 64.2 MB in the beginning and 63.4 MB in the end (delta: 829.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 680.14 ms. Allocated memory is still 86.0 MB. Free memory was 63.0 MB in the beginning and 50.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 53340.69 ms. Allocated memory was 86.0 MB in the beginning and 343.9 MB in the end (delta: 257.9 MB). Free memory was 50.8 MB in the beginning and 183.8 MB in the end (delta: -133.0 MB). Peak memory consumption was 126.8 MB. Max. memory is 16.1 GB. * Witness Printer took 5.19 ms. Allocated memory is still 343.9 MB. Free memory was 183.8 MB in the beginning and 182.7 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 20 terminating modules (12 trivial, 3 deterministic, 5 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 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 11 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. One nondeterministic module has affine ranking function n and consists of 8 locations. 12 modules have a trivial ranking function, the largest among these consists of 24 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 53.2s and 14 iterations. TraceHistogramMax:10. Analysis of lassos took 29.6s. Construction of modules took 6.3s. Büchi inclusion checks took 15.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 19. Automata minimization 0.9s AutomataMinimizationTime, 19 MinimizatonAttempts, 1733 StatesRemovedByMinimization, 19 NontrivialMinimizations. Non-live state removal took 0.7s Buchi closure took 0.0s. Biggest automaton had 3231 states and ocurred in iteration 7. Nontrivial modules had stage [3, 0, 4, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1/22 HoareTripleCheckerStatistics: 726 SDtfs, 1830 SDslu, 2110 SDs, 0 SdLazy, 5154 SolverSat, 1072 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.3s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI5 SILT7 lasso0 LassoPreprocessingBenchmarks: Lassos: inital21 mio100 ax100 hnf82 lsp92 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq188 hnf93 smp75 dnf100 smp100 tf109 neg96 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 21ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 33 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 8 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 13.7s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...