./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 69874e26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive-simple/fibo_5-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-69874e2 [2020-12-01 15:13:10,983 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-01 15:13:10,991 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-01 15:13:11,051 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-01 15:13:11,052 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-01 15:13:11,057 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-01 15:13:11,060 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-01 15:13:11,064 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-01 15:13:11,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-01 15:13:11,072 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-01 15:13:11,073 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-01 15:13:11,075 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-01 15:13:11,076 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-01 15:13:11,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-01 15:13:11,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-01 15:13:11,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-01 15:13:11,084 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-01 15:13:11,087 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-01 15:13:11,091 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-01 15:13:11,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-01 15:13:11,100 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-01 15:13:11,101 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-01 15:13:11,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-01 15:13:11,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-01 15:13:11,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-01 15:13:11,113 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-01 15:13:11,113 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-01 15:13:11,115 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-01 15:13:11,116 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-01 15:13:11,117 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-01 15:13:11,117 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-01 15:13:11,119 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-01 15:13:11,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-01 15:13:11,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-01 15:13:11,123 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-01 15:13:11,123 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-01 15:13:11,124 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-01 15:13:11,124 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-01 15:13:11,124 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-01 15:13:11,125 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-01 15:13:11,126 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-01 15:13:11,127 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-12-01 15:13:11,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-01 15:13:11,167 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-01 15:13:11,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-01 15:13:11,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-01 15:13:11,170 INFO L138 SettingsManager]: * Use SBE=true [2020-12-01 15:13:11,170 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-12-01 15:13:11,170 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-12-01 15:13:11,170 INFO L138 SettingsManager]: * Use old map elimination=false [2020-12-01 15:13:11,170 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-12-01 15:13:11,171 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-12-01 15:13:11,172 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-12-01 15:13:11,172 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-01 15:13:11,172 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-01 15:13:11,173 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-01 15:13:11,173 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-01 15:13:11,173 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-01 15:13:11,173 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-01 15:13:11,173 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-12-01 15:13:11,174 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-12-01 15:13:11,174 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-12-01 15:13:11,174 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-01 15:13:11,174 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-01 15:13:11,175 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-12-01 15:13:11,175 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-01 15:13:11,175 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-12-01 15:13:11,175 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-01 15:13:11,175 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-01 15:13:11,176 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-12-01 15:13:11,176 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-01 15:13:11,176 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-01 15:13:11,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-01 15:13:11,177 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-12-01 15:13:11,178 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-12-01 15:13:11,178 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_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 66ecdb3150790d7b9fa430121dbc9b6f1f7ee64a [2020-12-01 15:13:11,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-01 15:13:11,505 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-01 15:13:11,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-01 15:13:11,510 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-01 15:13:11,511 INFO L275 PluginConnector]: CDTParser initialized [2020-12-01 15:13:11,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/../../sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-12-01 15:13:11,601 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/data/014f603a0/f23c22d9cef1458b85c521acc81e924c/FLAG2da4ec142 [2020-12-01 15:13:12,048 INFO L306 CDTParser]: Found 1 translation units. [2020-12-01 15:13:12,048 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/sv-benchmarks/c/recursive-simple/fibo_5-1.c [2020-12-01 15:13:12,058 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/data/014f603a0/f23c22d9cef1458b85c521acc81e924c/FLAG2da4ec142 [2020-12-01 15:13:12,077 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/data/014f603a0/f23c22d9cef1458b85c521acc81e924c [2020-12-01 15:13:12,080 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-01 15:13:12,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-01 15:13:12,087 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-01 15:13:12,087 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-01 15:13:12,091 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-01 15:13:12,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,093 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f36899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12, skipping insertion in model container [2020-12-01 15:13:12,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,100 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-01 15:13:12,113 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-01 15:13:12,288 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:13:12,297 INFO L203 MainTranslator]: Completed pre-run [2020-12-01 15:13:12,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-01 15:13:12,359 INFO L208 MainTranslator]: Completed translation [2020-12-01 15:13:12,359 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12 WrapperNode [2020-12-01 15:13:12,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-01 15:13:12,362 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-01 15:13:12,363 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-01 15:13:12,363 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-01 15:13:12,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,378 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-01 15:13:12,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-01 15:13:12,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-01 15:13:12,401 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-01 15:13:12,408 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,410 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... [2020-12-01 15:13:12,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-01 15:13:12,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-01 15:13:12,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-01 15:13:12,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-01 15:13:12,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:12,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-01 15:13:12,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-01 15:13:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-01 15:13:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-01 15:13:12,481 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2020-12-01 15:13:12,481 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2020-12-01 15:13:12,671 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-01 15:13:12,671 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-01 15:13:12,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:13:12 BoogieIcfgContainer [2020-12-01 15:13:12,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-01 15:13:12,674 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-12-01 15:13:12,674 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-12-01 15:13:12,677 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-12-01 15:13:12,678 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:13:12,691 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 01.12 03:13:12" (1/3) ... [2020-12-01 15:13:12,692 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b9e66f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:13:12, skipping insertion in model container [2020-12-01 15:13:12,697 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:13:12,697 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.12 03:13:12" (2/3) ... [2020-12-01 15:13:12,698 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1b9e66f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 01.12 03:13:12, skipping insertion in model container [2020-12-01 15:13:12,698 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-12-01 15:13:12,698 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:13:12" (3/3) ... [2020-12-01 15:13:12,699 INFO L389 chiAutomizerObserver]: Analyzing ICFG fibo_5-1.c [2020-12-01 15:13:12,783 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-12-01 15:13:12,783 INFO L360 BuchiCegarLoop]: Hoare is false [2020-12-01 15:13:12,783 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-12-01 15:13:12,783 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-01 15:13:12,783 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-01 15:13:12,784 INFO L364 BuchiCegarLoop]: Difference is false [2020-12-01 15:13:12,784 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-01 15:13:12,784 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-12-01 15:13:12,809 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-12-01 15:13:12,857 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:13:12,857 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:12,858 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:12,864 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-12-01 15:13:12,864 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-12-01 15:13:12,864 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-12-01 15:13:12,864 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states. [2020-12-01 15:13:12,867 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:13:12,867 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:12,867 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:12,868 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-12-01 15:13:12,868 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-12-01 15:13:12,906 INFO L794 eck$LassoCheckResult]: Stem: 13#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 8#L27true call main_#t~ret9 := fibo(main_~x~0);< 16#fiboENTRYtrue [2020-12-01 15:13:12,906 INFO L796 eck$LassoCheckResult]: Loop: 16#fiboENTRYtrue ~n := #in~n; 14#L8true assume !(~n < 1); 18#L10true assume !(1 == ~n); 7#L13true call #t~ret7 := fibo(~n - 1);< 16#fiboENTRYtrue [2020-12-01 15:13:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 29885, now seen corresponding path program 1 times [2020-12-01 15:13:12,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:12,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741256788] [2020-12-01 15:13:12,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:13,061 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:13,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:13,097 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:13,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:13,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 1 times [2020-12-01 15:13:13,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:13,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689449545] [2020-12-01 15:13:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:13,107 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:13,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:13,113 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:13,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1830210312, now seen corresponding path program 1 times [2020-12-01 15:13:13,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:13,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268877036] [2020-12-01 15:13:13,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:13,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:13,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:13,150 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:13,155 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:13,254 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:13,255 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:13,255 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:13,256 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:13,256 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:13:13,256 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,256 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:13,256 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:13,257 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2020-12-01 15:13:13,257 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:13,257 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:13,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,290 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,389 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:13,390 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:13,400 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:13,401 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:13,431 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:13,471 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:13,472 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:13,487 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:13,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:13,529 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,544 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:13,544 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:13,581 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:13,582 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,603 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:13,603 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:13,643 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:13,643 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,681 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:13:13,681 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:13,760 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:13:13,761 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:13,761 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:13,762 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:13,762 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:13,762 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:13:13,762 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,762 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:13,762 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:13,762 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration1_Loop [2020-12-01 15:13:13,762 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:13,780 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:13,781 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,802 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,805 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,807 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:13,880 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:13,885 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:13,896 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-12-01 15:13:13,900 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:13,900 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:13,901 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:13,901 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:13,901 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:13,906 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:13,907 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,919 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:13,959 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 [2020-12-01 15:13:13,961 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:13,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:13,962 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:13,962 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:13,962 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:13,963 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:13,963 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:13,975 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:14,015 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:14,016 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:14,016 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:14,017 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:14,017 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:14,017 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:14,018 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:14,018 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:14,037 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:14,060 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 [2020-12-01 15:13:14,061 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:14,061 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:14,061 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:14,062 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:14,062 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:14,062 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:14,062 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:14,088 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:14,108 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 [2020-12-01 15:13:14,109 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:14,109 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:14,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:14,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:14,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:14,110 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:14,110 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:14,125 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:13:14,131 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-12-01 15:13:14,131 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_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:14,143 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:13:14,143 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:13:14,144 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:13:14,144 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:14,174 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:13:14,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-01 15:13:14,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:13:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:14,327 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-12-01 15:13:14,328 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states. Second operand 4 states. [2020-12-01 15:13:14,434 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states.. Second operand 4 states. Result 49 states and 61 transitions. Complement of second has 12 states. [2020-12-01 15:13:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-12-01 15:13:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-12-01 15:13:14,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-12-01 15:13:14,443 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 4 letters. [2020-12-01 15:13:14,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:14,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 7 letters. Loop has 4 letters. [2020-12-01 15:13:14,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:14,444 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 8 letters. [2020-12-01 15:13:14,444 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:14,445 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 61 transitions. [2020-12-01 15:13:14,450 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:13:14,455 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 25 states and 34 transitions. [2020-12-01 15:13:14,456 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2020-12-01 15:13:14,456 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-12-01 15:13:14,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 34 transitions. [2020-12-01 15:13:14,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:14,471 INFO L692 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2020-12-01 15:13:14,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 34 transitions. [2020-12-01 15:13:14,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2020-12-01 15:13:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-01 15:13:14,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2020-12-01 15:13:14,505 INFO L715 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-01 15:13:14,505 INFO L595 BuchiCegarLoop]: Abstraction has 20 states and 26 transitions. [2020-12-01 15:13:14,505 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-12-01 15:13:14,505 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 26 transitions. [2020-12-01 15:13:14,509 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:13:14,509 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:14,509 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:14,510 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:14,510 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:14,510 INFO L794 eck$LassoCheckResult]: Stem: 132#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 130#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 128#L27 call main_#t~ret9 := fibo(main_~x~0);< 138#fiboENTRY ~n := #in~n; 136#L8 assume !(~n < 1); 137#L10 assume !(1 == ~n); 125#L13 call #t~ret7 := fibo(~n - 1);< 131#fiboENTRY ~n := #in~n; 133#L8 assume ~n < 1;#res := 0; 134#fiboFINAL assume true; 124#fiboEXIT >#35#return; 126#L13-1 [2020-12-01 15:13:14,510 INFO L796 eck$LassoCheckResult]: Loop: 126#L13-1 call #t~ret8 := fibo(~n - 2);< 129#fiboENTRY ~n := #in~n; 143#L8 assume !(~n < 1); 142#L10 assume !(1 == ~n); 127#L13 call #t~ret7 := fibo(~n - 1);< 129#fiboENTRY ~n := #in~n; 143#L8 assume ~n < 1;#res := 0; 140#fiboFINAL assume true; 141#fiboEXIT >#35#return; 126#L13-1 [2020-12-01 15:13:14,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:14,511 INFO L82 PathProgramCache]: Analyzing trace with hash 523436175, now seen corresponding path program 1 times [2020-12-01 15:13:14,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:14,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568008710] [2020-12-01 15:13:14,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-01 15:13:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:13:14,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568008710] [2020-12-01 15:13:14,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:13:14,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:13:14,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689077078] [2020-12-01 15:13:14,596 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-12-01 15:13:14,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:14,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1950983701, now seen corresponding path program 1 times [2020-12-01 15:13:14,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:14,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097804273] [2020-12-01 15:13:14,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-12-01 15:13:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-01 15:13:14,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097804273] [2020-12-01 15:13:14,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-01 15:13:14,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-01 15:13:14,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371614405] [2020-12-01 15:13:14,634 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-12-01 15:13:14,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:13:14,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-01 15:13:14,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-01 15:13:14,638 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. cyclomatic complexity: 8 Second operand 6 states. [2020-12-01 15:13:14,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:13:14,699 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-12-01 15:13:14,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-01 15:13:14,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 32 transitions. [2020-12-01 15:13:14,709 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:13:14,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 24 states and 30 transitions. [2020-12-01 15:13:14,710 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-12-01 15:13:14,711 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 20 [2020-12-01 15:13:14,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 30 transitions. [2020-12-01 15:13:14,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:14,711 INFO L692 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-01 15:13:14,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 30 transitions. [2020-12-01 15:13:14,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-12-01 15:13:14,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-01 15:13:14,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2020-12-01 15:13:14,718 INFO L715 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-01 15:13:14,719 INFO L595 BuchiCegarLoop]: Abstraction has 24 states and 30 transitions. [2020-12-01 15:13:14,719 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-12-01 15:13:14,719 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 30 transitions. [2020-12-01 15:13:14,720 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-12-01 15:13:14,720 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:14,720 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:14,721 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:14,721 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2020-12-01 15:13:14,722 INFO L794 eck$LassoCheckResult]: Stem: 205#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 200#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 201#L27 call main_#t~ret9 := fibo(main_~x~0);< 208#fiboENTRY ~n := #in~n; 211#L8 assume !(~n < 1); 212#L10 assume !(1 == ~n); 198#L13 call #t~ret7 := fibo(~n - 1);< 204#fiboENTRY ~n := #in~n; 209#L8 assume !(~n < 1); 210#L10 assume 1 == ~n;#res := 1; 213#fiboFINAL assume true; 197#fiboEXIT >#35#return; 199#L13-1 [2020-12-01 15:13:14,722 INFO L796 eck$LassoCheckResult]: Loop: 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume !(1 == ~n); 202#L13 call #t~ret7 := fibo(~n - 1);< 203#fiboENTRY ~n := #in~n; 218#L8 assume !(~n < 1); 217#L10 assume 1 == ~n;#res := 1; 206#fiboFINAL assume true; 207#fiboEXIT >#35#return; 199#L13-1 call #t~ret8 := fibo(~n - 2);< 203#fiboENTRY ~n := #in~n; 218#L8 assume ~n < 1;#res := 0; 219#fiboFINAL assume true; 216#fiboEXIT >#37#return; 214#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 215#fiboFINAL assume true; 220#fiboEXIT >#35#return; 199#L13-1 [2020-12-01 15:13:14,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:14,722 INFO L82 PathProgramCache]: Analyzing trace with hash -953322862, now seen corresponding path program 1 times [2020-12-01 15:13:14,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:14,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720512836] [2020-12-01 15:13:14,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-01 15:13:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:14,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720512836] [2020-12-01 15:13:14,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456413758] [2020-12-01 15:13:14,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:13:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:14,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:13:14,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:14,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:13:14,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-01 15:13:14,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735694119] [2020-12-01 15:13:14,894 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-12-01 15:13:14,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:14,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2000232554, now seen corresponding path program 1 times [2020-12-01 15:13:14,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:14,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606787861] [2020-12-01 15:13:14,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:14,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:14,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:14,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:14,932 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:15,238 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:15,238 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:15,238 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:15,239 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:15,239 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:13:15,239 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:15,239 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:15,239 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:15,239 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2020-12-01 15:13:15,239 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:15,239 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:15,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:15,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:15,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:15,249 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:15,310 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:15,310 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:15,321 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:15,321 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:15,335 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:15,335 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=1} Honda state: {fibo_#t~ret7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:15,372 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:15,372 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:15,391 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:15,391 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:15,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:15,417 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:15,431 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:15,431 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:15,456 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:15,457 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:15,534 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:13:15,534 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:16,246 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:13:16,248 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:16,248 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:16,248 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:16,248 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:16,249 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:13:16,249 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:16,249 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:16,249 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:16,249 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration3_Loop [2020-12-01 15:13:16,249 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:16,249 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:16,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:16,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:16,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:16,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:16,373 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:16,373 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:16,390 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 [2020-12-01 15:13:16,392 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:16,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:16,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:16,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:16,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:16,393 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:16,393 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:16,419 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:16,460 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 [2020-12-01 15:13:16,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:16,462 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:16,462 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:16,462 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:16,462 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:16,463 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:16,463 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:16,475 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:16,529 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 [2020-12-01 15:13:16,532 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:16,532 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:16,533 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:16,533 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:16,533 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:16,538 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:16,538 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:16,551 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:13:16,563 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:13:16,564 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_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:16,576 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:13:16,576 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:13:16,576 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:13:16,576 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:16,606 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:13:16,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:16,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-01 15:13:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:16,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-01 15:13:16,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-01 15:13:16,961 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2020-12-01 15:13:16,961 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8 Second operand 9 states. [2020-12-01 15:13:17,316 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 30 transitions. cyclomatic complexity: 8. Second operand 9 states. Result 159 states and 215 transitions. Complement of second has 48 states. [2020-12-01 15:13:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 2 stem states 7 non-accepting loop states 1 accepting loop states [2020-12-01 15:13:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-01 15:13:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 41 transitions. [2020-12-01 15:13:17,319 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 22 letters. [2020-12-01 15:13:17,321 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:17,321 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 34 letters. Loop has 22 letters. [2020-12-01 15:13:17,323 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:17,323 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 41 transitions. Stem has 12 letters. Loop has 44 letters. [2020-12-01 15:13:17,328 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:17,328 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 159 states and 215 transitions. [2020-12-01 15:13:17,344 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-12-01 15:13:17,350 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 159 states to 128 states and 180 transitions. [2020-12-01 15:13:17,350 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-12-01 15:13:17,356 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-12-01 15:13:17,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 180 transitions. [2020-12-01 15:13:17,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:17,357 INFO L692 BuchiCegarLoop]: Abstraction has 128 states and 180 transitions. [2020-12-01 15:13:17,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 180 transitions. [2020-12-01 15:13:17,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 106. [2020-12-01 15:13:17,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-01 15:13:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 140 transitions. [2020-12-01 15:13:17,389 INFO L715 BuchiCegarLoop]: Abstraction has 106 states and 140 transitions. [2020-12-01 15:13:17,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:13:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-01 15:13:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-12-01 15:13:17,392 INFO L87 Difference]: Start difference. First operand 106 states and 140 transitions. Second operand 8 states. [2020-12-01 15:13:17,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:13:17,491 INFO L93 Difference]: Finished difference Result 125 states and 167 transitions. [2020-12-01 15:13:17,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-01 15:13:17,491 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 125 states and 167 transitions. [2020-12-01 15:13:17,496 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-12-01 15:13:17,500 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 125 states to 122 states and 164 transitions. [2020-12-01 15:13:17,500 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2020-12-01 15:13:17,501 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2020-12-01 15:13:17,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 164 transitions. [2020-12-01 15:13:17,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:17,501 INFO L692 BuchiCegarLoop]: Abstraction has 122 states and 164 transitions. [2020-12-01 15:13:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states and 164 transitions. [2020-12-01 15:13:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 106. [2020-12-01 15:13:17,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-01 15:13:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2020-12-01 15:13:17,513 INFO L715 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-12-01 15:13:17,513 INFO L595 BuchiCegarLoop]: Abstraction has 106 states and 139 transitions. [2020-12-01 15:13:17,514 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-12-01 15:13:17,514 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 106 states and 139 transitions. [2020-12-01 15:13:17,516 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 15 [2020-12-01 15:13:17,516 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:17,516 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:17,517 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:17,517 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:17,517 INFO L794 eck$LassoCheckResult]: Stem: 864#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 859#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 842#L27 call main_#t~ret9 := fibo(main_~x~0);< 873#fiboENTRY ~n := #in~n; 910#L8 assume !(~n < 1); 882#L10 assume !(1 == ~n); 862#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 867#L8 assume !(~n < 1); 869#L10 assume !(1 == ~n); 868#L13 call #t~ret7 := fibo(~n - 1);< 863#fiboENTRY ~n := #in~n; 879#L8 assume !(~n < 1); 909#L10 assume 1 == ~n;#res := 1; 908#fiboFINAL assume true; 907#fiboEXIT >#35#return; 845#L13-1 call #t~ret8 := fibo(~n - 2);< 905#fiboENTRY ~n := #in~n; 912#L8 assume ~n < 1;#res := 0; 945#fiboFINAL assume true; 944#fiboEXIT >#37#return; 941#L13-2 #res := #t~ret7 + #t~ret8;havoc #t~ret7;havoc #t~ret8; 940#fiboFINAL assume true; 938#fiboEXIT >#35#return; 861#L13-1 [2020-12-01 15:13:17,518 INFO L796 eck$LassoCheckResult]: Loop: 861#L13-1 call #t~ret8 := fibo(~n - 2);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume !(1 == ~n); 860#L13 call #t~ret7 := fibo(~n - 1);< 843#fiboENTRY ~n := #in~n; 933#L8 assume !(~n < 1); 880#L10 assume 1 == ~n;#res := 1; 881#fiboFINAL assume true; 935#fiboEXIT >#35#return; 861#L13-1 [2020-12-01 15:13:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1335554545, now seen corresponding path program 1 times [2020-12-01 15:13:17,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:17,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813795129] [2020-12-01 15:13:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:17,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:17,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-12-01 15:13:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:17,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-12-01 15:13:17,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:17,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-12-01 15:13:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:17,664 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:13:17,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813795129] [2020-12-01 15:13:17,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99699488] [2020-12-01 15:13:17,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:13:17,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:17,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:13:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:17,783 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-01 15:13:17,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:13:17,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-12-01 15:13:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451345371] [2020-12-01 15:13:17,784 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-12-01 15:13:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash 350977484, now seen corresponding path program 1 times [2020-12-01 15:13:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:17,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129939944] [2020-12-01 15:13:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:17,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:17,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:17,793 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:17,794 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:17,900 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:17,900 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:17,900 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:17,900 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:17,900 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:13:17,900 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:17,900 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:17,901 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:17,901 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration4_Loop [2020-12-01 15:13:17,901 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:17,901 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:17,902 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:17,904 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:17,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:17,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:17,966 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:17,966 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:17,983 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:17,983 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:18,001 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:18,001 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:18,027 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:18,027 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:18,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:13:18,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:19,374 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:13:19,376 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:19,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:19,376 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:19,376 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:19,376 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:13:19,376 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:19,376 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:19,376 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:19,376 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration4_Loop [2020-12-01 15:13:19,376 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:19,377 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:19,377 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:19,381 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:19,389 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:19,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:19,436 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:19,436 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:19,448 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 [2020-12-01 15:13:19,449 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:19,449 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:19,449 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:19,449 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:19,449 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:19,450 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:19,450 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:19,451 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:19,471 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 [2020-12-01 15:13:19,472 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:19,472 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:19,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:19,473 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:19,473 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:19,480 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:19,480 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:19,499 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:13:19,505 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:13:19,505 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_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:19,513 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:13:19,513 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:13:19,513 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:13:19,513 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:19,533 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:13:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:19,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:13:19,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:19,675 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:13:19,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:13:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:19,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:13:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:19,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:19,834 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 [2020-12-01 15:13:19,834 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-12-01 15:13:20,070 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 195 states and 261 transitions. Complement of second has 33 states. [2020-12-01 15:13:20,072 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 [2020-12-01 15:13:20,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-01 15:13:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 37 transitions. [2020-12-01 15:13:20,072 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 37 transitions. Stem has 28 letters. Loop has 10 letters. [2020-12-01 15:13:20,073 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:20,073 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:13:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:20,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:13:20,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:20,185 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:13:20,197 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:13:20,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:20,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:13:20,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:20,313 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 [2020-12-01 15:13:20,313 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-12-01 15:13:20,527 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 292 states and 393 transitions. Complement of second has 25 states. [2020-12-01 15:13:20,527 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 [2020-12-01 15:13:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-01 15:13:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 24 transitions. [2020-12-01 15:13:20,528 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 24 transitions. Stem has 28 letters. Loop has 10 letters. [2020-12-01 15:13:20,529 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:20,529 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:13:20,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:20,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:13:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:20,652 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:13:20,663 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-01 15:13:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:20,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-01 15:13:20,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:20,776 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 [2020-12-01 15:13:20,776 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38 Second operand 8 states. [2020-12-01 15:13:21,030 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 106 states and 139 transitions. cyclomatic complexity: 38. Second operand 8 states. Result 810 states and 1071 transitions. Complement of second has 130 states. [2020-12-01 15:13:21,031 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 [2020-12-01 15:13:21,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-12-01 15:13:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 42 transitions. [2020-12-01 15:13:21,032 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 10 letters. [2020-12-01 15:13:21,032 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:21,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 38 letters. Loop has 10 letters. [2020-12-01 15:13:21,033 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:21,033 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 42 transitions. Stem has 28 letters. Loop has 20 letters. [2020-12-01 15:13:21,034 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:21,034 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 810 states and 1071 transitions. [2020-12-01 15:13:21,050 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 44 [2020-12-01 15:13:21,063 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 810 states to 419 states and 599 transitions. [2020-12-01 15:13:21,063 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-12-01 15:13:21,064 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-12-01 15:13:21,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 419 states and 599 transitions. [2020-12-01 15:13:21,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:21,064 INFO L692 BuchiCegarLoop]: Abstraction has 419 states and 599 transitions. [2020-12-01 15:13:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states and 599 transitions. [2020-12-01 15:13:21,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 332. [2020-12-01 15:13:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-01 15:13:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 449 transitions. [2020-12-01 15:13:21,134 INFO L715 BuchiCegarLoop]: Abstraction has 332 states and 449 transitions. [2020-12-01 15:13:21,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:13:21,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:13:21,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:13:21,135 INFO L87 Difference]: Start difference. First operand 332 states and 449 transitions. Second operand 12 states. [2020-12-01 15:13:21,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:13:21,387 INFO L93 Difference]: Finished difference Result 504 states and 746 transitions. [2020-12-01 15:13:21,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:13:21,388 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 504 states and 746 transitions. [2020-12-01 15:13:21,400 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-12-01 15:13:21,414 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 504 states to 502 states and 743 transitions. [2020-12-01 15:13:21,414 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-12-01 15:13:21,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 226 [2020-12-01 15:13:21,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 502 states and 743 transitions. [2020-12-01 15:13:21,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:21,417 INFO L692 BuchiCegarLoop]: Abstraction has 502 states and 743 transitions. [2020-12-01 15:13:21,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states and 743 transitions. [2020-12-01 15:13:21,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 454. [2020-12-01 15:13:21,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-12-01 15:13:21,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 675 transitions. [2020-12-01 15:13:21,463 INFO L715 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-12-01 15:13:21,463 INFO L595 BuchiCegarLoop]: Abstraction has 454 states and 675 transitions. [2020-12-01 15:13:21,463 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-12-01 15:13:21,463 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 454 states and 675 transitions. [2020-12-01 15:13:21,468 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-12-01 15:13:21,468 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:21,468 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:21,470 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:21,470 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-12-01 15:13:21,470 INFO L794 eck$LassoCheckResult]: Stem: 3810#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(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 3795#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 3796#L27 call main_#t~ret9 := fibo(main_~x~0);< 3820#fiboENTRY ~n := #in~n; 3866#L8 assume !(~n < 1); 3865#L10 assume !(1 == ~n); 3861#L13 call #t~ret7 := fibo(~n - 1);< 3863#fiboENTRY ~n := #in~n; 3864#L8 assume !(~n < 1); 3860#L10 assume !(1 == ~n); 3842#L13 call #t~ret7 := fibo(~n - 1);< 3857#fiboENTRY ~n := #in~n; 3858#L8 assume !(~n < 1); 3862#L10 assume !(1 == ~n); 3843#L13 call #t~ret7 := fibo(~n - 1);< 3857#fiboENTRY ~n := #in~n; 3859#L8 assume !(~n < 1); 3841#L10 assume 1 == ~n;#res := 1; 3844#fiboFINAL assume true; 3901#fiboEXIT >#35#return; 3897#L13-1 call #t~ret8 := fibo(~n - 2);< 3899#fiboENTRY ~n := #in~n; 3926#L8 assume !(~n < 1); 3916#L10 assume !(1 == ~n); 3917#L13 call #t~ret7 := fibo(~n - 1);< 3955#fiboENTRY ~n := #in~n; 3995#L8 assume !(~n < 1); 3985#L10 assume !(1 == ~n); 3986#L13 call #t~ret7 := fibo(~n - 1);< 4035#fiboENTRY [2020-12-01 15:13:21,470 INFO L796 eck$LassoCheckResult]: Loop: 4035#fiboENTRY ~n := #in~n; 4067#L8 assume !(~n < 1); 4049#L10 assume !(1 == ~n); 4034#L13 call #t~ret7 := fibo(~n - 1);< 4035#fiboENTRY [2020-12-01 15:13:21,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:21,471 INFO L82 PathProgramCache]: Analyzing trace with hash -777601154, now seen corresponding path program 1 times [2020-12-01 15:13:21,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:21,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002769343] [2020-12-01 15:13:21,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:21,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-12-01 15:13:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-01 15:13:21,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002769343] [2020-12-01 15:13:21,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129447906] [2020-12-01 15:13:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:13:21,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:21,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-01 15:13:21,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-01 15:13:21,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:13:21,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-01 15:13:21,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777445203] [2020-12-01 15:13:21,719 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-12-01 15:13:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:21,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524, now seen corresponding path program 2 times [2020-12-01 15:13:21,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:21,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262964284] [2020-12-01 15:13:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:21,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:21,736 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:21,740 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:21,781 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:21,781 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:21,781 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:21,782 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:21,782 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:13:21,782 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:21,782 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:21,782 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:21,782 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2020-12-01 15:13:21,782 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:21,782 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:21,784 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:21,786 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:21,789 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:21,791 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:21,799 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:21,837 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:21,837 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:21,848 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:21,849 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:21,863 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:21,863 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:21,890 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:21,890 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:21,892 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:21,892 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret7=0} Honda state: {fibo_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:21,911 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:21,912 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:21,914 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:21,914 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_~n=0} Honda state: {fibo_~n=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:21,945 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:21,946 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-12-01 15:13:21,982 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:21,982 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:22,035 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:13:22,036 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:22,036 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:22,037 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:22,037 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:22,037 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:13:22,037 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:22,037 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:22,037 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:22,037 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration5_Loop [2020-12-01 15:13:22,037 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:22,037 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:22,038 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:22,043 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:22,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:22,048 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:22,059 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:22,131 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:22,131 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:22,142 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 [2020-12-01 15:13:22,143 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:22,143 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:22,143 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:22,144 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:22,144 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:22,144 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:22,144 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:22,163 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:22,198 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 [2020-12-01 15:13:22,200 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:22,200 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:22,200 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:22,200 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:22,200 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:22,201 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:22,201 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:22,211 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:22,246 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 [2020-12-01 15:13:22,247 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:22,247 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:22,248 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:22,248 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:22,248 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:22,250 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:22,250 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:22,263 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:22,293 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 [2020-12-01 15:13:22,295 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:22,295 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:22,296 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:22,296 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:22,296 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:22,296 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:22,296 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:22,297 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:22,317 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 [2020-12-01 15:13:22,318 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:22,318 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:22,318 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:22,318 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:22,318 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:22,319 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:22,319 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-12-01 15:13:22,331 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:13:22,334 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-12-01 15:13:22,334 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_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:22,336 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:13:22,336 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:13:22,336 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:13:22,336 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_#in~n) = 1*fibo_#in~n Supporting invariants [] [2020-12-01 15:13:22,355 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:13:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:22,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:13:22,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:13:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:22,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:22,522 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2020-12-01 15:13:22,522 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-12-01 15:13:22,637 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-12-01 15:13:22,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-12-01 15:13:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-12-01 15:13:22,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-12-01 15:13:22,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-12-01 15:13:22,638 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:22,638 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:13:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:22,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:13:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:22,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:22,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:13:22,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:22,817 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2020-12-01 15:13:22,817 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-12-01 15:13:22,895 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 464 states and 685 transitions. Complement of second has 13 states. [2020-12-01 15:13:22,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-12-01 15:13:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-12-01 15:13:22,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 13 transitions. [2020-12-01 15:13:22,896 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 13 transitions. Stem has 29 letters. Loop has 4 letters. [2020-12-01 15:13:22,896 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:22,896 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:13:22,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:22,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-01 15:13:22,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:23,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:13:23,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:23,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:23,049 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 3 loop predicates [2020-12-01 15:13:23,049 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231 Second operand 5 states. [2020-12-01 15:13:23,145 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 454 states and 675 transitions. cyclomatic complexity: 231. Second operand 5 states. Result 615 states and 859 transitions. Complement of second has 14 states. [2020-12-01 15:13:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2020-12-01 15:13:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-12-01 15:13:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 21 transitions. [2020-12-01 15:13:23,146 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 4 letters. [2020-12-01 15:13:23,147 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:23,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 33 letters. Loop has 4 letters. [2020-12-01 15:13:23,147 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:23,147 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 21 transitions. Stem has 29 letters. Loop has 8 letters. [2020-12-01 15:13:23,148 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:23,148 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 615 states and 859 transitions. [2020-12-01 15:13:23,158 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-12-01 15:13:23,168 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 615 states to 518 states and 750 transitions. [2020-12-01 15:13:23,168 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 187 [2020-12-01 15:13:23,169 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 196 [2020-12-01 15:13:23,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 518 states and 750 transitions. [2020-12-01 15:13:23,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:23,169 INFO L692 BuchiCegarLoop]: Abstraction has 518 states and 750 transitions. [2020-12-01 15:13:23,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states and 750 transitions. [2020-12-01 15:13:23,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 488. [2020-12-01 15:13:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 488 states. [2020-12-01 15:13:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 714 transitions. [2020-12-01 15:13:23,190 INFO L715 BuchiCegarLoop]: Abstraction has 488 states and 714 transitions. [2020-12-01 15:13:23,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:13:23,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-01 15:13:23,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-12-01 15:13:23,191 INFO L87 Difference]: Start difference. First operand 488 states and 714 transitions. Second operand 12 states. [2020-12-01 15:13:23,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:13:23,395 INFO L93 Difference]: Finished difference Result 547 states and 814 transitions. [2020-12-01 15:13:23,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-01 15:13:23,396 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 547 states and 814 transitions. [2020-12-01 15:13:23,406 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-12-01 15:13:23,416 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 547 states to 541 states and 803 transitions. [2020-12-01 15:13:23,416 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 212 [2020-12-01 15:13:23,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 212 [2020-12-01 15:13:23,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 541 states and 803 transitions. [2020-12-01 15:13:23,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:23,417 INFO L692 BuchiCegarLoop]: Abstraction has 541 states and 803 transitions. [2020-12-01 15:13:23,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states and 803 transitions. [2020-12-01 15:13:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 504. [2020-12-01 15:13:23,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-12-01 15:13:23,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 746 transitions. [2020-12-01 15:13:23,441 INFO L715 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-12-01 15:13:23,441 INFO L595 BuchiCegarLoop]: Abstraction has 504 states and 746 transitions. [2020-12-01 15:13:23,441 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-12-01 15:13:23,441 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 504 states and 746 transitions. [2020-12-01 15:13:23,446 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-12-01 15:13:23,446 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-12-01 15:13:23,446 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-12-01 15:13:23,448 INFO L853 BuchiCegarLoop]: Counterexample stem histogram [8, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-01 15:13:23,448 INFO L854 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-12-01 15:13:23,448 INFO L794 eck$LassoCheckResult]: Stem: 7329#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string4.base, #t~string4.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string4.base, #t~string4.offset, 1);call write~init~int(0, #t~string4.base, 1 + #t~string4.offset, 1);call #t~string5.base, #t~string5.offset := #Ultimate.allocOnStack(11);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 7323#L-1 havoc main_#res;havoc main_#t~ret9, main_~x~0, main_~result~0;main_~x~0 := 5; 7318#L27 call main_#t~ret9 := fibo(main_~x~0);< 7339#fiboENTRY ~n := #in~n; 7340#L8 assume !(~n < 1); 7369#L10 assume !(1 == ~n); 7367#L13 call #t~ret7 := fibo(~n - 1);< 7372#fiboENTRY ~n := #in~n; 7370#L8 assume !(~n < 1); 7371#L10 assume !(1 == ~n); 7365#L13 call #t~ret7 := fibo(~n - 1);< 7368#fiboENTRY ~n := #in~n; 7395#L8 assume !(~n < 1); 7393#L10 assume !(1 == ~n); 7387#L13 call #t~ret7 := fibo(~n - 1);< 7391#fiboENTRY ~n := #in~n; 7411#L8 assume !(~n < 1); 7410#L10 assume !(1 == ~n); 7386#L13 call #t~ret7 := fibo(~n - 1);< 7391#fiboENTRY ~n := #in~n; 7415#L8 assume !(~n < 1); 7692#L10 assume 1 == ~n;#res := 1; 7691#fiboFINAL assume true; 7689#fiboEXIT >#35#return; 7679#L13-1 call #t~ret8 := fibo(~n - 2);< 7681#fiboENTRY ~n := #in~n; 7711#L8 assume !(~n < 1); 7712#L10 assume !(1 == ~n); 7715#L13 call #t~ret7 := fibo(~n - 1);< 7724#fiboENTRY ~n := #in~n; 7735#L8 assume !(~n < 1); 7737#L10 assume !(1 == ~n); 7343#L13 call #t~ret7 := fibo(~n - 1);< 7353#fiboENTRY ~n := #in~n; 7355#L8 assume !(~n < 1); 7363#L10 assume !(1 == ~n); 7342#L13 [2020-12-01 15:13:23,448 INFO L796 eck$LassoCheckResult]: Loop: 7342#L13 call #t~ret7 := fibo(~n - 1);< 7353#fiboENTRY ~n := #in~n; 7355#L8 assume !(~n < 1); 7363#L10 assume !(1 == ~n); 7342#L13 [2020-12-01 15:13:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:23,449 INFO L82 PathProgramCache]: Analyzing trace with hash 42869646, now seen corresponding path program 2 times [2020-12-01 15:13:23,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:23,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027828091] [2020-12-01 15:13:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:23,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:23,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2020-12-01 15:13:23,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:13:23,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027828091] [2020-12-01 15:13:23,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865593106] [2020-12-01 15:13:23,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-01 15:13:23,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-01 15:13:23,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-01 15:13:23,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-01 15:13:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 81 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-01 15:13:23,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-01 15:13:23,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-01 15:13:23,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813505033] [2020-12-01 15:13:23,713 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-12-01 15:13:23,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:23,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1955414, now seen corresponding path program 3 times [2020-12-01 15:13:23,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-01 15:13:23,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314390730] [2020-12-01 15:13:23,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-01 15:13:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:23,716 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:23,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-01 15:13:23,717 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-01 15:13:23,718 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-01 15:13:23,760 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:23,760 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:23,760 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:23,760 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:23,761 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-12-01 15:13:23,761 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:23,761 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:23,761 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:23,761 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2020-12-01 15:13:23,761 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:23,761 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:23,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:23,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:23,765 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:23,775 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:23,830 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:23,831 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:23,842 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:23,842 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:23,845 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:23,845 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#t~ret8=0} Honda state: {fibo_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:23,878 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:23,878 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:23,881 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-12-01 15:13:23,881 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {fibo_#res=0} Honda state: {fibo_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:23,901 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-12-01 15:13:23,902 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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 [2020-12-01 15:13:23,926 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-12-01 15:13:23,926 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-12-01 15:13:30,129 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-12-01 15:13:30,131 INFO L210 LassoAnalysis]: Preferences: [2020-12-01 15:13:30,131 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-12-01 15:13:30,131 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-12-01 15:13:30,132 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-12-01 15:13:30,132 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-12-01 15:13:30,132 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:30,132 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-12-01 15:13:30,132 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-12-01 15:13:30,132 INFO L133 ssoRankerPreferences]: Filename of dumped script: fibo_5-1.c_Iteration6_Loop [2020-12-01 15:13:30,132 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-12-01 15:13:30,132 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-12-01 15:13:30,133 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:30,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:30,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:30,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-12-01 15:13:30,217 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-12-01 15:13:30,217 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:30,244 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 [2020-12-01 15:13:30,246 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:30,246 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:30,246 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:30,246 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:30,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:30,247 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:30,247 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:30,255 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:30,292 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 [2020-12-01 15:13:30,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:30,294 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:30,294 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:30,294 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:30,294 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:30,295 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:30,295 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:30,311 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:30,345 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 [2020-12-01 15:13:30,347 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-12-01 15:13:30,347 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-12-01 15:13:30,347 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-12-01 15:13:30,347 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-12-01 15:13:30,347 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-12-01 15:13:30,349 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-12-01 15:13:30,349 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:30,371 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-12-01 15:13:30,373 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-12-01 15:13:30,374 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_d52cead9-fd80-479a-9ebe-3c16cd16cbe1/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) [2020-12-01 15:13:30,377 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-12-01 15:13:30,377 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-12-01 15:13:30,377 INFO L510 LassoAnalysis]: Proved termination. [2020-12-01 15:13:30,377 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(fibo_~n) = 1*fibo_~n Supporting invariants [] Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-12-01 15:13:30,409 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-12-01 15:13:30,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:30,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:13:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:30,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:13:30,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:30,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:30,604 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 4 loop predicates [2020-12-01 15:13:30,604 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-12-01 15:13:30,676 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 516 states and 759 transitions. Complement of second has 18 states. [2020-12-01 15:13:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2020-12-01 15:13:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-01 15:13:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 13 transitions. [2020-12-01 15:13:30,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 13 transitions. Stem has 36 letters. Loop has 4 letters. [2020-12-01 15:13:30,678 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:30,678 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-12-01 15:13:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-01 15:13:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:30,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-01 15:13:30,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-01 15:13:30,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-01 15:13:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-01 15:13:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-01 15:13:30,855 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 4 loop predicates [2020-12-01 15:13:30,855 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252 Second operand 6 states. [2020-12-01 15:13:30,964 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 504 states and 746 transitions. cyclomatic complexity: 252. Second operand 6 states. Result 746 states and 1075 transitions. Complement of second has 22 states. [2020-12-01 15:13:30,965 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 [2020-12-01 15:13:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-01 15:13:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 16 transitions. [2020-12-01 15:13:30,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 4 letters. [2020-12-01 15:13:30,966 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:30,966 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 40 letters. Loop has 4 letters. [2020-12-01 15:13:30,966 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:30,967 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 7 states and 16 transitions. Stem has 36 letters. Loop has 8 letters. [2020-12-01 15:13:30,967 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-12-01 15:13:30,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 746 states and 1075 transitions. [2020-12-01 15:13:30,995 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 54 [2020-12-01 15:13:31,005 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 746 states to 682 states and 1006 transitions. [2020-12-01 15:13:31,006 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 226 [2020-12-01 15:13:31,006 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 254 [2020-12-01 15:13:31,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 682 states and 1006 transitions. [2020-12-01 15:13:31,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-12-01 15:13:31,007 INFO L692 BuchiCegarLoop]: Abstraction has 682 states and 1006 transitions. [2020-12-01 15:13:31,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states and 1006 transitions. [2020-12-01 15:13:31,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 665. [2020-12-01 15:13:31,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 665 states. [2020-12-01 15:13:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 981 transitions. [2020-12-01 15:13:31,034 INFO L715 BuchiCegarLoop]: Abstraction has 665 states and 981 transitions. [2020-12-01 15:13:31,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-01 15:13:31,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-01 15:13:31,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-12-01 15:13:31,039 INFO L87 Difference]: Start difference. First operand 665 states and 981 transitions. Second operand 13 states. [2020-12-01 15:13:31,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-01 15:13:31,246 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2020-12-01 15:13:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-01 15:13:31,247 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 164 states and 189 transitions. [2020-12-01 15:13:31,249 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:13:31,249 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 164 states to 0 states and 0 transitions. [2020-12-01 15:13:31,249 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-12-01 15:13:31,250 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-12-01 15:13:31,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-12-01 15:13:31,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-12-01 15:13:31,250 INFO L692 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:13:31,250 INFO L715 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:13:31,250 INFO L595 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-01 15:13:31,250 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-12-01 15:13:31,250 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-12-01 15:13:31,250 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-12-01 15:13:31,250 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-12-01 15:13:31,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 01.12 03:13:31 BoogieIcfgContainer [2020-12-01 15:13:31,256 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-12-01 15:13:31,256 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-01 15:13:31,256 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-01 15:13:31,257 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-01 15:13:31,257 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.12 03:13:12" (3/4) ... [2020-12-01 15:13:31,260 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-01 15:13:31,260 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-01 15:13:31,262 INFO L168 Benchmark]: Toolchain (without parser) took 19177.16 ms. Allocated memory was 90.2 MB in the beginning and 201.3 MB in the end (delta: 111.1 MB). Free memory was 54.3 MB in the beginning and 129.8 MB in the end (delta: -75.4 MB). Peak memory consumption was 34.6 MB. Max. memory is 16.1 GB. [2020-12-01 15:13:31,262 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 90.2 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:13:31,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.92 ms. Allocated memory is still 90.2 MB. Free memory was 54.2 MB in the beginning and 67.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2020-12-01 15:13:31,263 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.06 ms. Allocated memory is still 90.2 MB. Free memory was 67.7 MB in the beginning and 66.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:13:31,269 INFO L168 Benchmark]: Boogie Preprocessor took 17.97 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 65.5 MB in the end (delta: 848.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-01 15:13:31,271 INFO L168 Benchmark]: RCFGBuilder took 254.34 ms. Allocated memory is still 90.2 MB. Free memory was 65.3 MB in the beginning and 54.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-01 15:13:31,272 INFO L168 Benchmark]: BuchiAutomizer took 18581.93 ms. Allocated memory was 90.2 MB in the beginning and 201.3 MB in the end (delta: 111.1 MB). Free memory was 54.4 MB in the beginning and 130.8 MB in the end (delta: -76.5 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. [2020-12-01 15:13:31,274 INFO L168 Benchmark]: Witness Printer took 3.49 ms. Allocated memory is still 201.3 MB. Free memory was 130.8 MB in the beginning and 129.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-01 15:13:31,276 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 90.2 MB. Free memory is still 70.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 274.92 ms. Allocated memory is still 90.2 MB. Free memory was 54.2 MB in the beginning and 67.7 MB in the end (delta: -13.5 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.06 ms. Allocated memory is still 90.2 MB. Free memory was 67.7 MB in the beginning and 66.5 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 17.97 ms. Allocated memory is still 90.2 MB. Free memory was 66.4 MB in the beginning and 65.5 MB in the end (delta: 848.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 254.34 ms. Allocated memory is still 90.2 MB. Free memory was 65.3 MB in the beginning and 54.4 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 18581.93 ms. Allocated memory was 90.2 MB in the beginning and 201.3 MB in the end (delta: 111.1 MB). Free memory was 54.4 MB in the beginning and 130.8 MB in the end (delta: -76.5 MB). Peak memory consumption was 37.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.49 ms. Allocated memory is still 201.3 MB. Free memory was 130.8 MB in the beginning and 129.8 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 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function \old(n) and consists of 4 locations. One deterministic module has affine ranking function n and consists of 10 locations. One deterministic module has affine ranking function n and consists of 7 locations. One nondeterministic module has affine ranking function n and consists of 9 locations. One nondeterministic module has affine ranking function \old(n) and consists of 5 locations. 5 modules have a trivial ranking function, the largest among these consists of 13 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 18.4s and 7 iterations. TraceHistogramMax:8. Analysis of lassos took 13.1s. Construction of modules took 0.8s. Büchi inclusion checks took 3.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 9. Automata minimization 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 262 StatesRemovedByMinimization, 8 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 504 states and ocurred in iteration 5. Nontrivial modules had stage [2, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 8/26 HoareTripleCheckerStatistics: 189 SDtfs, 438 SDslu, 256 SDs, 0 SdLazy, 965 SolverSat, 246 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT0 SILN0 SILU0 SILI1 SILT4 lasso0 LassoPreprocessingBenchmarks: Lassos: inital17 mio100 ax100 hnf94 lsp93 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq180 hnf93 smp78 dnf100 smp100 tf110 neg96 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 31ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 13 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 8.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...