./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/recursive/McCarthy91-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/recursive/McCarthy91-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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 3e87f89409ab3e763661ad617b0dadcb988e72d1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 20:55:42,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 20:55:42,121 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 20:55:42,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 20:55:42,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 20:55:42,206 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 20:55:42,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 20:55:42,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 20:55:42,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 20:55:42,233 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 20:55:42,234 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 20:55:42,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 20:55:42,238 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 20:55:42,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 20:55:42,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 20:55:42,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 20:55:42,247 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 20:55:42,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 20:55:42,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 20:55:42,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 20:55:42,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 20:55:42,267 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 20:55:42,269 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 20:55:42,271 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 20:55:42,280 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 20:55:42,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 20:55:42,281 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 20:55:42,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 20:55:42,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 20:55:42,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 20:55:42,286 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 20:55:42,287 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 20:55:42,289 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 20:55:42,290 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 20:55:42,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 20:55:42,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 20:55:42,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 20:55:42,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 20:55:42,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 20:55:42,295 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 20:55:42,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 20:55:42,299 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-11-29 20:55:42,343 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 20:55:42,343 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 20:55:42,345 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 20:55:42,345 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 20:55:42,346 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 20:55:42,346 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 20:55:42,346 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 20:55:42,346 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 20:55:42,347 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 20:55:42,347 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 20:55:42,348 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 20:55:42,348 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 20:55:42,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 20:55:42,349 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 20:55:42,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 20:55:42,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 20:55:42,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 20:55:42,350 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 20:55:42,350 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 20:55:42,350 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 20:55:42,350 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 20:55:42,351 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 20:55:42,351 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 20:55:42,351 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 20:55:42,351 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 20:55:42,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 20:55:42,352 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 20:55:42,352 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 20:55:42,352 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 20:55:42,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 20:55:42,354 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 20:55:42,355 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 20:55:42,356 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 20:55:42,356 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_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e87f89409ab3e763661ad617b0dadcb988e72d1 [2020-11-29 20:55:42,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 20:55:42,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 20:55:42,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 20:55:42,739 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 20:55:42,740 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 20:55:42,741 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/../../sv-benchmarks/c/recursive/McCarthy91-2.c [2020-11-29 20:55:42,824 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/data/ddc17de86/4615749bc4f147cb8aa22348a85bd754/FLAGf3c3b831a [2020-11-29 20:55:43,291 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 20:55:43,291 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/sv-benchmarks/c/recursive/McCarthy91-2.c [2020-11-29 20:55:43,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/data/ddc17de86/4615749bc4f147cb8aa22348a85bd754/FLAGf3c3b831a [2020-11-29 20:55:43,671 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/data/ddc17de86/4615749bc4f147cb8aa22348a85bd754 [2020-11-29 20:55:43,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 20:55:43,675 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 20:55:43,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 20:55:43,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 20:55:43,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 20:55:43,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,684 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31ed8a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43, skipping insertion in model container [2020-11-29 20:55:43,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 20:55:43,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 20:55:43,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:55:43,900 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 20:55:43,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 20:55:43,936 INFO L208 MainTranslator]: Completed translation [2020-11-29 20:55:43,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43 WrapperNode [2020-11-29 20:55:43,938 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 20:55:43,940 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 20:55:43,940 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 20:55:43,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 20:55:43,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,957 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 20:55:43,977 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 20:55:43,977 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 20:55:43,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 20:55:43,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,990 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,990 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,992 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... [2020-11-29 20:55:43,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 20:55:43,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 20:55:43,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 20:55:43,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 20:55:43,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 20:55:44,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 20:55:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 20:55:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 20:55:44,093 INFO L130 BoogieDeclarations]: Found specification of procedure f91 [2020-11-29 20:55:44,094 INFO L138 BoogieDeclarations]: Found implementation of procedure f91 [2020-11-29 20:55:44,335 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 20:55:44,335 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-29 20:55:44,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:55:44 BoogieIcfgContainer [2020-11-29 20:55:44,337 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 20:55:44,349 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 20:55:44,360 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 20:55:44,364 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 20:55:44,365 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 20:55:44,365 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 08:55:43" (1/3) ... [2020-11-29 20:55:44,366 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e2b2679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 08:55:44, skipping insertion in model container [2020-11-29 20:55:44,367 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 20:55:44,367 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 08:55:43" (2/3) ... [2020-11-29 20:55:44,367 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5e2b2679 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 08:55:44, skipping insertion in model container [2020-11-29 20:55:44,367 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 20:55:44,368 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:55:44" (3/3) ... [2020-11-29 20:55:44,369 INFO L373 chiAutomizerObserver]: Analyzing ICFG McCarthy91-2.c [2020-11-29 20:55:44,444 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 20:55:44,444 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 20:55:44,444 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 20:55:44,445 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 20:55:44,445 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 20:55:44,445 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 20:55:44,445 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 20:55:44,445 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 20:55:44,460 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-11-29 20:55:44,483 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 20:55:44,483 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:55:44,483 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:55:44,491 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 20:55:44,491 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 20:55:44,491 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 20:55:44,491 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states. [2020-11-29 20:55:44,494 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 20:55:44,494 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:55:44,494 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:55:44,495 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 20:55:44,495 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 20:55:44,502 INFO L794 eck$LassoCheckResult]: Stem: 12#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(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 11#L-1true havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 6#L28true call main_#t~ret10 := f91(main_~x~0);< 18#f91ENTRYtrue [2020-11-29 20:55:44,503 INFO L796 eck$LassoCheckResult]: Loop: 18#f91ENTRYtrue ~x := #in~x; 5#L18true assume !(~x > 100); 19#L21true call #t~ret7 := f91(11 + ~x);< 18#f91ENTRYtrue [2020-11-29 20:55:44,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash 29879, now seen corresponding path program 1 times [2020-11-29 20:55:44,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:44,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193280147] [2020-11-29 20:55:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:44,609 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:44,627 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:44,649 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:55:44,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:44,651 INFO L82 PathProgramCache]: Analyzing trace with hash 46807, now seen corresponding path program 1 times [2020-11-29 20:55:44,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:44,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937106343] [2020-11-29 20:55:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:44,659 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:44,663 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:44,665 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:55:44,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:44,668 INFO L82 PathProgramCache]: Analyzing trace with hash 890142305, now seen corresponding path program 1 times [2020-11-29 20:55:44,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:44,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508543542] [2020-11-29 20:55:44,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:44,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:44,707 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:44,712 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:55:44,843 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:55:44,844 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:55:44,844 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:55:44,844 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:55:44,845 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:55:44,845 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:44,845 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:55:44,845 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:55:44,845 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration1_Loop [2020-11-29 20:55:44,846 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:55:44,846 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:55:44,864 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:44,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:44,876 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:44,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:44,884 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:44,961 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:55:44,962 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:55:44,973 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:44,973 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:44,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:55:44,984 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:45,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:45,009 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:55:45,012 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:55:45,012 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:45,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:45,040 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:55:45,055 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:55:45,056 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:45,083 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:45,083 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:55:45,088 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:55:45,089 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:45,113 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:45,113 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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 [2020-11-29 20:55:45,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:55:45,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:55:46,176 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:55:46,185 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:55:46,185 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:55:46,185 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:55:46,185 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:55:46,185 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:55:46,186 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:46,186 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:55:46,186 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:55:46,186 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration1_Loop [2020-11-29 20:55:46,187 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:55:46,187 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:55:46,188 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:46,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:46,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:46,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:46,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:46,314 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:55:46,319 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:55:46,330 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:46,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:46,332 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:46,333 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:46,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:46,333 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:46,335 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:46,336 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 [2020-11-29 20:55:46,340 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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) [2020-11-29 20:55:46,390 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:46,391 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:46,392 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:46,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:46,392 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:46,392 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:46,394 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:46,394 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 [2020-11-29 20:55:46,400 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:46,434 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:46,435 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:46,435 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:46,435 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:46,436 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:46,436 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:46,437 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:46,437 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:55:46,439 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:46,468 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:46,469 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:46,470 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:46,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:46,470 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:46,470 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:46,471 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:46,471 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:55:46,473 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:55:46,501 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:46,502 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:46,503 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:46,503 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:46,503 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:46,503 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:46,504 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:46,505 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:46,510 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:55:46,514 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:55:46,514 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:46,545 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:55:46,545 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:55:46,546 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:55:46,546 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -2*f91_#in~x + 211 Supporting invariants [] [2020-11-29 20:55:46,568 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:55:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 20:55:46,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:55:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:55:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:55:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:55:46,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:55:46,757 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 [2020-11-29 20:55:46,758 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states. Second operand 4 states. [2020-11-29 20:55:46,954 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states.. Second operand 4 states. Result 35 states and 43 transitions. Complement of second has 12 states. [2020-11-29 20:55:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 20:55:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 20:55:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-11-29 20:55:46,959 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2020-11-29 20:55:46,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:55:46,960 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2020-11-29 20:55:46,960 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:55:46,961 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2020-11-29 20:55:46,961 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:55:46,962 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 43 transitions. [2020-11-29 20:55:46,965 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 20:55:46,971 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 19 states and 25 transitions. [2020-11-29 20:55:46,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-29 20:55:46,973 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2020-11-29 20:55:46,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2020-11-29 20:55:46,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:55:46,975 INFO L691 BuchiCegarLoop]: Abstraction has 19 states and 25 transitions. [2020-11-29 20:55:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2020-11-29 20:55:46,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-11-29 20:55:46,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-29 20:55:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-11-29 20:55:47,000 INFO L714 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-29 20:55:47,001 INFO L594 BuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-11-29 20:55:47,001 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 20:55:47,001 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2020-11-29 20:55:47,002 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 20:55:47,002 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:55:47,002 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:55:47,003 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:55:47,003 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:55:47,004 INFO L794 eck$LassoCheckResult]: Stem: 107#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(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 105#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 106#L28 call main_#t~ret10 := f91(main_~x~0);< 116#f91ENTRY ~x := #in~x; 111#L18 assume !(~x > 100); 109#L21 call #t~ret7 := f91(11 + ~x);< 119#f91ENTRY ~x := #in~x; 108#L18 assume ~x > 100;#res := ~x - 10; 110#f91FINAL assume true; 117#f91EXIT >#29#return; 114#L21-1 [2020-11-29 20:55:47,004 INFO L796 eck$LassoCheckResult]: Loop: 114#L21-1 call #t~ret8 := f91(#t~ret7);< 118#f91ENTRY ~x := #in~x; 121#L18 assume !(~x > 100); 113#L21 call #t~ret7 := f91(11 + ~x);< 118#f91ENTRY ~x := #in~x; 121#L18 assume ~x > 100;#res := ~x - 10; 115#f91FINAL assume true; 120#f91EXIT >#29#return; 114#L21-1 [2020-11-29 20:55:47,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:47,004 INFO L82 PathProgramCache]: Analyzing trace with hash -218206616, now seen corresponding path program 1 times [2020-11-29 20:55:47,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:47,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407326641] [2020-11-29 20:55:47,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:47,022 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:47,038 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:47,043 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:55:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1767505954, now seen corresponding path program 1 times [2020-11-29 20:55:47,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:47,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268666290] [2020-11-29 20:55:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:47,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:47,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:47,057 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:47,059 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:55:47,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:55:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1919740023, now seen corresponding path program 1 times [2020-11-29 20:55:47,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:55:47,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281543802] [2020-11-29 20:55:47,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:55:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:47,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:55:47,099 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:55:47,107 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:55:47,232 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:55:47,232 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:55:47,232 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:55:47,232 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:55:47,232 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:55:47,239 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:47,240 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:55:47,240 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:55:47,240 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration2_Loop [2020-11-29 20:55:47,240 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:55:47,240 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:55:47,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:47,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:47,266 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:47,320 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:55:47,320 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:55:47,325 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:47,325 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:47,329 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:55:47,329 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:55:47,378 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:55:47,378 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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) [2020-11-29 20:55:47,436 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:55:47,436 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:59,537 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-11-29 20:55:59,541 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:55:59,541 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:55:59,541 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:55:59,541 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:55:59,542 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:55:59,542 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:59,542 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:55:59,542 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:55:59,542 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration2_Loop [2020-11-29 20:55:59,542 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:55:59,542 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:55:59,544 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:59,590 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:59,763 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 14 [2020-11-29 20:55:59,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:55:59,827 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:55:59,827 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:55:59,836 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:59,838 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:59,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:59,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:59,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:59,838 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:59,839 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:59,839 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:59,845 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:59,885 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:55:59,887 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:55:59,888 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:55:59,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:55:59,888 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:55:59,888 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:55:59,891 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:55:59,892 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:55:59,896 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:55:59,925 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:55:59,926 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:55:59,933 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:55:59,933 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:55:59,933 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:55:59,933 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#t~ret7) = -2*f91_#t~ret7 + 201 Supporting invariants [] [2020-11-29 20:55:59,955 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:55:59,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:00,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 20:56:00,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:00,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:56:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:00,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:00,305 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 [2020-11-29 20:56:00,305 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand 9 states. [2020-11-29 20:56:00,621 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand 9 states. Result 51 states and 73 transitions. Complement of second has 32 states. [2020-11-29 20:56:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2020-11-29 20:56:00,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 20:56:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2020-11-29 20:56:00,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2020-11-29 20:56:00,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:00,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2020-11-29 20:56:00,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:00,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2020-11-29 20:56:00,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:00,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2020-11-29 20:56:00,633 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-29 20:56:00,639 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2020-11-29 20:56:00,641 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-29 20:56:00,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2020-11-29 20:56:00,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2020-11-29 20:56:00,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:56:00,643 INFO L691 BuchiCegarLoop]: Abstraction has 42 states and 62 transitions. [2020-11-29 20:56:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2020-11-29 20:56:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2020-11-29 20:56:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 20:56:00,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2020-11-29 20:56:00,660 INFO L714 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-11-29 20:56:00,660 INFO L594 BuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2020-11-29 20:56:00,660 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 20:56:00,661 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2020-11-29 20:56:00,665 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-29 20:56:00,665 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:56:00,665 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:56:00,666 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 20:56:00,666 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-29 20:56:00,667 INFO L794 eck$LassoCheckResult]: Stem: 293#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(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 291#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 292#L28 call main_#t~ret10 := f91(main_~x~0);< 298#f91ENTRY ~x := #in~x; 296#L18 assume !(~x > 100); 297#L21 call #t~ret7 := f91(11 + ~x);< 316#f91ENTRY ~x := #in~x; 317#L18 assume ~x > 100;#res := ~x - 10; 308#f91FINAL assume true; 309#f91EXIT >#29#return; 301#L21-1 call #t~ret8 := f91(#t~ret7);< 314#f91ENTRY ~x := #in~x; 326#L18 assume !(~x > 100); 295#L21 [2020-11-29 20:56:00,667 INFO L796 eck$LassoCheckResult]: Loop: 295#L21 call #t~ret7 := f91(11 + ~x);< 315#f91ENTRY ~x := #in~x; 294#L18 assume !(~x > 100); 295#L21 [2020-11-29 20:56:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:00,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1987218266, now seen corresponding path program 2 times [2020-11-29 20:56:00,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:00,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607044588] [2020-11-29 20:56:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:00,704 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:00,716 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:00,720 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:00,721 INFO L82 PathProgramCache]: Analyzing trace with hash 57247, now seen corresponding path program 2 times [2020-11-29 20:56:00,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:00,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915776160] [2020-11-29 20:56:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:00,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:00,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:00,727 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:00,728 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:00,729 INFO L82 PathProgramCache]: Analyzing trace with hash -609818202, now seen corresponding path program 3 times [2020-11-29 20:56:00,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:00,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331685695] [2020-11-29 20:56:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:00,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 20:56:00,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-29 20:56:00,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331685695] [2020-11-29 20:56:00,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 20:56:00,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-29 20:56:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783205793] [2020-11-29 20:56:00,898 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:56:00,899 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:56:00,899 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:56:00,899 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:56:00,899 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:56:00,899 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:00,899 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:56:00,899 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:56:00,899 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration3_Loop [2020-11-29 20:56:00,899 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:56:00,899 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:56:00,900 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:00,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:00,912 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:00,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:00,969 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:56:00,969 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:00,980 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:00,980 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:56:00,985 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:00,985 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:01,037 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:01,037 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:01,041 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:01,042 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret8=0} Honda state: {f91_#t~ret8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:01,081 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:01,081 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:01,090 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:01,090 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:01,131 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:01,131 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:01,171 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:56:01,171 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:56:13,212 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2020-11-29 20:56:13,216 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:56:13,216 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:56:13,217 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:56:13,217 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:56:13,217 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:56:13,217 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:13,217 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:56:13,217 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:56:13,217 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration3_Loop [2020-11-29 20:56:13,217 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:56:13,217 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:56:13,218 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:13,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:13,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:13,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:13,333 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:56:13,334 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:13,338 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:13,342 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:13,342 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:13,342 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:13,342 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:13,342 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:13,345 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:13,345 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:13,347 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:13,385 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:13,386 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:13,387 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:13,387 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:13,387 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:13,387 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:13,388 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:13,388 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:13,390 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:13,429 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:13,431 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:13,431 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:13,431 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:13,431 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:13,431 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:13,433 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:13,433 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:13,435 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:13,460 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 [2020-11-29 20:56:13,462 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:13,462 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:13,462 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:13,462 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:13,462 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:13,463 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:13,464 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:56:13,471 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:56:13,474 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:56:13,474 INFO L444 ModelExtractionUtils]: 1 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_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:13,476 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:56:13,476 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:56:13,476 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:56:13,477 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_~x) = -2*f91_~x + 189 Supporting invariants [] [2020-11-29 20:56:13,496 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:56:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:13,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:56:13,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:13,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:13,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:56:13,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:13,659 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 [2020-11-29 20:56:13,659 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-29 20:56:13,795 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2020-11-29 20:56:13,798 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 [2020-11-29 20:56:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 20:56:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2020-11-29 20:56:13,799 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 20:56:13,799 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:13,799 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:13,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:56:13,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:13,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:56:13,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:13,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:13,944 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 [2020-11-29 20:56:13,944 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-29 20:56:14,040 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 43 states and 59 transitions. Complement of second has 13 states. [2020-11-29 20:56:14,043 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 [2020-11-29 20:56:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 20:56:14,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2020-11-29 20:56:14,044 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 20:56:14,044 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:14,044 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:14,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 20:56:14,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 20:56:14,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:14,187 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 [2020-11-29 20:56:14,187 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-29 20:56:14,303 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 71 states and 100 transitions. Complement of second has 16 states. [2020-11-29 20:56:14,304 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 [2020-11-29 20:56:14,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 20:56:14,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2020-11-29 20:56:14,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2020-11-29 20:56:14,305 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:14,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2020-11-29 20:56:14,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:14,306 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2020-11-29 20:56:14,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:14,306 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2020-11-29 20:56:14,310 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 20:56:14,313 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2020-11-29 20:56:14,313 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-29 20:56:14,314 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2020-11-29 20:56:14,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2020-11-29 20:56:14,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:56:14,314 INFO L691 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2020-11-29 20:56:14,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2020-11-29 20:56:14,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-11-29 20:56:14,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 20:56:14,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2020-11-29 20:56:14,329 INFO L714 BuchiCegarLoop]: Abstraction has 42 states and 60 transitions. [2020-11-29 20:56:14,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:56:14,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 20:56:14,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-29 20:56:14,333 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand 8 states. [2020-11-29 20:56:14,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:56:14,493 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2020-11-29 20:56:14,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 20:56:14,495 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2020-11-29 20:56:14,497 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-11-29 20:56:14,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2020-11-29 20:56:14,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2020-11-29 20:56:14,500 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-11-29 20:56:14,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2020-11-29 20:56:14,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:56:14,500 INFO L691 BuchiCegarLoop]: Abstraction has 58 states and 75 transitions. [2020-11-29 20:56:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2020-11-29 20:56:14,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-11-29 20:56:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-29 20:56:14,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2020-11-29 20:56:14,510 INFO L714 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-11-29 20:56:14,510 INFO L594 BuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2020-11-29 20:56:14,510 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 20:56:14,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2020-11-29 20:56:14,512 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2020-11-29 20:56:14,512 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:56:14,512 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:56:14,513 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 20:56:14,514 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2020-11-29 20:56:14,514 INFO L794 eck$LassoCheckResult]: Stem: 839#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(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 837#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 838#L28 call main_#t~ret10 := f91(main_~x~0);< 851#f91ENTRY ~x := #in~x; 883#L18 assume !(~x > 100); 866#L21 call #t~ret7 := f91(11 + ~x);< 867#f91ENTRY ~x := #in~x; 876#L18 assume !(~x > 100); 872#L21 call #t~ret7 := f91(11 + ~x);< 874#f91ENTRY ~x := #in~x; 877#L18 assume ~x > 100;#res := ~x - 10; 875#f91FINAL assume true; 873#f91EXIT >#29#return; 849#L21-1 call #t~ret8 := f91(#t~ret7);< 861#f91ENTRY ~x := #in~x; 891#L18 assume ~x > 100;#res := ~x - 10; 890#f91FINAL assume true; 887#f91EXIT >#31#return; 868#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 885#f91FINAL assume true; 884#f91EXIT >#29#return; 853#L21-1 call #t~ret8 := f91(#t~ret7);< 882#f91ENTRY [2020-11-29 20:56:14,514 INFO L796 eck$LassoCheckResult]: Loop: 882#f91ENTRY ~x := #in~x; 879#L18 assume !(~x > 100); 841#L21 call #t~ret7 := f91(11 + ~x);< 865#f91ENTRY ~x := #in~x; 844#L18 assume !(~x > 100); 842#L21 call #t~ret7 := f91(11 + ~x);< 878#f91ENTRY ~x := #in~x; 840#L18 assume ~x > 100;#res := ~x - 10; 843#f91FINAL assume true; 893#f91EXIT >#29#return; 846#L21-1 call #t~ret8 := f91(#t~ret7);< 859#f91ENTRY ~x := #in~x; 880#L18 assume ~x > 100;#res := ~x - 10; 881#f91FINAL assume true; 886#f91EXIT >#31#return; 868#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 885#f91FINAL assume true; 884#f91EXIT >#29#return; 854#L21-1 call #t~ret8 := f91(#t~ret7);< 882#f91ENTRY [2020-11-29 20:56:14,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -834951989, now seen corresponding path program 1 times [2020-11-29 20:56:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:14,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330564126] [2020-11-29 20:56:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:14,538 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:14,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:14,555 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:14,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:14,561 INFO L82 PathProgramCache]: Analyzing trace with hash -871747263, now seen corresponding path program 1 times [2020-11-29 20:56:14,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:14,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605349071] [2020-11-29 20:56:14,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:14,577 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:14,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:14,592 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:14,595 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:14,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:14,599 INFO L82 PathProgramCache]: Analyzing trace with hash 418853943, now seen corresponding path program 2 times [2020-11-29 20:56:14,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:14,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200131831] [2020-11-29 20:56:14,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:14,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-11-29 20:56:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:56:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:56:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-11-29 20:56:14,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-29 20:56:14,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-11-29 20:56:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 20:56:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200131831] [2020-11-29 20:56:14,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667943091] [2020-11-29 20:56:14,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 20:56:14,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 20:56:14,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 20:56:14,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 20:56:14,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-11-29 20:56:14,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 20:56:14,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-29 20:56:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051699464] [2020-11-29 20:56:15,227 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:56:15,227 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:56:15,227 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:56:15,227 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:56:15,227 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:56:15,227 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:15,227 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:56:15,227 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:56:15,227 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration4_Loop [2020-11-29 20:56:15,227 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:56:15,227 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:56:15,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:15,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:15,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:15,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:15,251 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:15,324 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:56:15,324 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:15,328 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:15,328 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:15,332 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:15,333 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#t~ret7=0} Honda state: {f91_#t~ret7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:15,370 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:15,370 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:15,373 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:15,373 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:15,394 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:15,394 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:56:15,396 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:15,396 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_#res=0} Honda state: {f91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:15,417 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:15,417 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:15,442 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:56:15,442 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:56:16,086 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:56:16,088 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:56:16,088 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:56:16,088 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:56:16,088 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:56:16,088 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:56:16,088 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:16,088 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:56:16,089 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:56:16,089 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration4_Loop [2020-11-29 20:56:16,089 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:56:16,089 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:56:16,089 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:16,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:16,097 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:16,099 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:16,107 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:16,167 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:56:16,168 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 20:56:16,186 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:16,188 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:16,188 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:16,188 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:16,188 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:16,188 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:16,190 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:16,190 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:16,192 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:16,222 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:16,223 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:16,223 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:16,223 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:16,223 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:16,223 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:16,224 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:16,224 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:56:16,225 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:16,246 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 [2020-11-29 20:56:16,247 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:16,247 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:16,247 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:16,247 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:16,247 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:16,248 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:16,248 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:56:16,249 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:16,271 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:16,278 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:16,278 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:16,279 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:16,279 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:16,279 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:16,281 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:16,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:56:16,283 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:56:16,287 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:56:16,287 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:16,294 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:56:16,294 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:56:16,294 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:56:16,294 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -1*f91_#in~x + 90 Supporting invariants [] [2020-11-29 20:56:16,314 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:56:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:16,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:56:16,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:16,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:16,484 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:16,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 20:56:16,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:16,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 20:56:16,787 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 20:56:16,787 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2020-11-29 20:56:17,378 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2020-11-29 20:56:17,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2020-11-29 20:56:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 20:56:17,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2020-11-29 20:56:17,381 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2020-11-29 20:56:17,381 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:17,381 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:17,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:17,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:56:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:17,521 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:17,524 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-29 20:56:17,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:17,846 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 20:56:17,847 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2020-11-29 20:56:17,847 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 12 states. [2020-11-29 20:56:18,394 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 12 states. Result 125 states and 150 transitions. Complement of second has 47 states. [2020-11-29 20:56:18,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2020-11-29 20:56:18,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 20:56:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2020-11-29 20:56:18,397 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2020-11-29 20:56:18,397 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:18,397 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:18,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 20:56:18,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:18,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:18,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:18,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:56:18,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 20:56:18,747 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 9 loop predicates [2020-11-29 20:56:18,747 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand 11 states. [2020-11-29 20:56:19,540 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand 11 states. Result 325 states and 417 transitions. Complement of second has 123 states. [2020-11-29 20:56:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 2 stem states 15 non-accepting loop states 1 accepting loop states [2020-11-29 20:56:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 20:56:19,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 49 transitions. [2020-11-29 20:56:19,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2020-11-29 20:56:19,545 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:19,545 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2020-11-29 20:56:19,546 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:19,546 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2020-11-29 20:56:19,546 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:19,547 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 325 states and 417 transitions. [2020-11-29 20:56:19,556 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 25 [2020-11-29 20:56:19,561 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 325 states to 169 states and 230 transitions. [2020-11-29 20:56:19,562 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2020-11-29 20:56:19,562 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2020-11-29 20:56:19,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 230 transitions. [2020-11-29 20:56:19,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:56:19,563 INFO L691 BuchiCegarLoop]: Abstraction has 169 states and 230 transitions. [2020-11-29 20:56:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 230 transitions. [2020-11-29 20:56:19,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2020-11-29 20:56:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-11-29 20:56:19,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2020-11-29 20:56:19,582 INFO L714 BuchiCegarLoop]: Abstraction has 140 states and 178 transitions. [2020-11-29 20:56:19,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 20:56:19,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 20:56:19,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-11-29 20:56:19,583 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand 10 states. [2020-11-29 20:56:19,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 20:56:19,821 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2020-11-29 20:56:19,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-29 20:56:19,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138 states and 163 transitions. [2020-11-29 20:56:19,840 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 20:56:19,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138 states to 101 states and 121 transitions. [2020-11-29 20:56:19,846 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2020-11-29 20:56:19,846 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2020-11-29 20:56:19,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 121 transitions. [2020-11-29 20:56:19,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 20:56:19,847 INFO L691 BuchiCegarLoop]: Abstraction has 101 states and 121 transitions. [2020-11-29 20:56:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states and 121 transitions. [2020-11-29 20:56:19,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2020-11-29 20:56:19,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-29 20:56:19,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2020-11-29 20:56:19,863 INFO L714 BuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-11-29 20:56:19,863 INFO L594 BuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2020-11-29 20:56:19,863 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 20:56:19,863 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 117 transitions. [2020-11-29 20:56:19,864 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 20:56:19,864 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 20:56:19,864 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 20:56:19,865 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-29 20:56:19,865 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 20:56:19,865 INFO L794 eck$LassoCheckResult]: Stem: 2644#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(15);call #t~string6.base, #t~string6.offset := #Ultimate.allocOnStack(12); 2642#L-1 havoc main_#res;havoc main_#t~nondet9, main_#t~ret10, main_~x~0, main_~result~0;main_~x~0 := main_#t~nondet9;havoc main_#t~nondet9; 2643#L28 call main_#t~ret10 := f91(main_~x~0);< 2656#f91ENTRY ~x := #in~x; 2649#L18 assume !(~x > 100); 2650#L21 call #t~ret7 := f91(11 + ~x);< 2668#f91ENTRY ~x := #in~x; 2670#L18 assume !(~x > 100); 2669#L21 call #t~ret7 := f91(11 + ~x);< 2698#f91ENTRY ~x := #in~x; 2700#L18 assume ~x > 100;#res := ~x - 10; 2699#f91FINAL assume true; 2697#f91EXIT >#29#return; 2693#L21-1 call #t~ret8 := f91(#t~ret7);< 2696#f91ENTRY ~x := #in~x; 2709#L18 assume ~x > 100;#res := ~x - 10; 2701#f91FINAL assume true; 2692#f91EXIT >#31#return; 2691#L21-2 #res := #t~ret8;havoc #t~ret8;havoc #t~ret7; 2689#f91FINAL assume true; 2688#f91EXIT >#29#return; 2682#L21-1 call #t~ret8 := f91(#t~ret7);< 2687#f91ENTRY ~x := #in~x; 2685#L18 assume !(~x > 100); 2663#L21 call #t~ret7 := f91(11 + ~x);< 2684#f91ENTRY ~x := #in~x; 2708#L18 assume ~x > 100;#res := ~x - 10; 2707#f91FINAL assume true; 2706#f91EXIT >#29#return; 2704#L21-1 call #t~ret8 := f91(#t~ret7);< 2705#f91ENTRY ~x := #in~x; 2720#L18 assume !(~x > 100); 2721#L21 call #t~ret7 := f91(11 + ~x);< 2672#f91ENTRY ~x := #in~x; 2738#L18 assume ~x > 100;#res := ~x - 10; 2736#f91FINAL assume true; 2729#f91EXIT >#29#return; 2654#L21-1 call #t~ret8 := f91(#t~ret7);< 2728#f91ENTRY [2020-11-29 20:56:19,865 INFO L796 eck$LassoCheckResult]: Loop: 2728#f91ENTRY ~x := #in~x; 2732#L18 assume !(~x > 100); 2730#L21 call #t~ret7 := f91(11 + ~x);< 2672#f91ENTRY ~x := #in~x; 2738#L18 assume ~x > 100;#res := ~x - 10; 2736#f91FINAL assume true; 2729#f91EXIT >#29#return; 2653#L21-1 call #t~ret8 := f91(#t~ret7);< 2728#f91ENTRY [2020-11-29 20:56:19,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:19,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1139827145, now seen corresponding path program 3 times [2020-11-29 20:56:19,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:19,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098073387] [2020-11-29 20:56:19,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:19,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:19,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:19,890 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:19,896 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:19,897 INFO L82 PathProgramCache]: Analyzing trace with hash 31195136, now seen corresponding path program 2 times [2020-11-29 20:56:19,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:19,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298149334] [2020-11-29 20:56:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:19,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:19,903 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:19,905 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:19,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:19,905 INFO L82 PathProgramCache]: Analyzing trace with hash 424810952, now seen corresponding path program 4 times [2020-11-29 20:56:19,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 20:56:19,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561843014] [2020-11-29 20:56:19,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 20:56:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:19,921 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 20:56:19,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 20:56:19,942 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 20:56:20,048 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:56:20,048 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:56:20,048 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:56:20,048 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:56:20,048 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 20:56:20,048 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,048 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:56:20,048 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:56:20,048 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration5_Loop [2020-11-29 20:56:20,048 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:56:20,048 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:56:20,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,051 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,063 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,095 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:56:20,095 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,100 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:20,100 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:56:20,103 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 20:56:20,103 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {f91_~x=0} Honda state: {f91_~x=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 20:56:20,125 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,149 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 20:56:20,149 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 20:56:20,152 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 20:56:20,172 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 20:56:20,172 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 20:56:20,172 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 20:56:20,172 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 20:56:20,172 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 20:56:20,172 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,172 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 20:56:20,172 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 20:56:20,172 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91-2.c_Iteration5_Loop [2020-11-29 20:56:20,172 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 20:56:20,172 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 20:56:20,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 20:56:20,258 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 20:56:20,258 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/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) [2020-11-29 20:56:20,275 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:20,277 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:20,277 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:20,277 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:20,277 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:20,277 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:20,278 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:20,278 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,280 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,316 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 20:56:20,317 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 20:56:20,317 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 20:56:20,317 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 20:56:20,317 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 20:56:20,318 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 20:56:20,319 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 20:56:20,319 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 20:56:20,321 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 20:56:20,323 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 20:56:20,323 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0962e4e4-6499-4e15-bc8c-4c8faf2fa8c8/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 20:56:20,325 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 20:56:20,325 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 20:56:20,325 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 20:56:20,325 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(f91_#in~x) = -2*f91_#in~x + 201 Supporting invariants [] [2020-11-29 20:56:20,352 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 20:56:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:20,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:56:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:20,513 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:20,516 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:20,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:56:20,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:20,681 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 [2020-11-29 20:56:20,681 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 20:56:20,813 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 107 states and 127 transitions. Complement of second has 12 states. [2020-11-29 20:56:20,817 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 [2020-11-29 20:56:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 20:56:20,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2020-11-29 20:56:20,817 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 20:56:20,818 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:20,818 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:20,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:56:20,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:20,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:20,946 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:20,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:56:20,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:21,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:21,092 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 20:56:21,092 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 20:56:21,451 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 125 states and 146 transitions. Complement of second has 24 states. [2020-11-29 20:56:21,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 20:56:21,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 20:56:21,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2020-11-29 20:56:21,452 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 20:56:21,452 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:21,453 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:21,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:56:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:21,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:21,598 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:21,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:56:21,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:21,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:21,730 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 7 loop predicates [2020-11-29 20:56:21,730 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 20:56:21,896 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 147 states and 167 transitions. Complement of second has 13 states. [2020-11-29 20:56:21,901 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 [2020-11-29 20:56:21,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 20:56:21,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2020-11-29 20:56:21,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 20:56:21,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:21,902 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 20:56:21,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 20:56:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 20:56:21,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:22,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:22,014 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 20:56:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 20:56:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 20:56:22,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 20:56:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 20:56:22,197 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2020-11-29 20:56:22,197 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand 9 states. [2020-11-29 20:56:22,648 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand 9 states. Result 182 states and 209 transitions. Complement of second has 48 states. [2020-11-29 20:56:22,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-29 20:56:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 20:56:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 27 transitions. [2020-11-29 20:56:22,649 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 8 letters. [2020-11-29 20:56:22,650 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:22,650 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 46 letters. Loop has 8 letters. [2020-11-29 20:56:22,651 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:22,651 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 16 letters. [2020-11-29 20:56:22,652 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 20:56:22,653 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 209 transitions. [2020-11-29 20:56:22,656 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 20:56:22,656 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 0 states and 0 transitions. [2020-11-29 20:56:22,656 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-29 20:56:22,656 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-29 20:56:22,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-29 20:56:22,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 20:56:22,657 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:56:22,657 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:56:22,657 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 20:56:22,657 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 20:56:22,657 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-29 20:56:22,658 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-29 20:56:22,658 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-29 20:56:22,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 08:56:22 BoogieIcfgContainer [2020-11-29 20:56:22,663 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 20:56:22,664 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 20:56:22,664 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 20:56:22,664 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 20:56:22,665 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 08:55:44" (3/4) ... [2020-11-29 20:56:22,668 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-29 20:56:22,668 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 20:56:22,669 INFO L168 Benchmark]: Toolchain (without parser) took 38993.40 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 65.2 MB in the beginning and 105.4 MB in the end (delta: -40.1 MB). Peak memory consumption was 5.3 MB. Max. memory is 16.1 GB. [2020-11-29 20:56:22,670 INFO L168 Benchmark]: CDTParser took 0.83 ms. Allocated memory is still 100.7 MB. Free memory was 81.2 MB in the beginning and 81.1 MB in the end (delta: 104.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:56:22,670 INFO L168 Benchmark]: CACSL2BoogieTranslator took 261.70 ms. Allocated memory is still 100.7 MB. Free memory was 65.0 MB in the beginning and 77.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 20:56:22,671 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.44 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:56:22,672 INFO L168 Benchmark]: Boogie Preprocessor took 19.84 ms. Allocated memory is still 100.7 MB. Free memory was 75.9 MB in the beginning and 74.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 20:56:22,672 INFO L168 Benchmark]: RCFGBuilder took 339.27 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 63.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 20:56:22,673 INFO L168 Benchmark]: BuchiAutomizer took 38314.62 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 63.7 MB in the beginning and 105.4 MB in the end (delta: -41.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2020-11-29 20:56:22,673 INFO L168 Benchmark]: Witness Printer took 4.04 ms. Allocated memory is still 146.8 MB. Free memory is still 105.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 20:56:22,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.83 ms. Allocated memory is still 100.7 MB. Free memory was 81.2 MB in the beginning and 81.1 MB in the end (delta: 104.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 261.70 ms. Allocated memory is still 100.7 MB. Free memory was 65.0 MB in the beginning and 77.0 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.44 ms. Allocated memory is still 100.7 MB. Free memory was 77.0 MB in the beginning and 75.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.84 ms. Allocated memory is still 100.7 MB. Free memory was 75.9 MB in the beginning and 74.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 339.27 ms. Allocated memory is still 100.7 MB. Free memory was 74.9 MB in the beginning and 63.7 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 38314.62 ms. Allocated memory was 100.7 MB in the beginning and 146.8 MB in the end (delta: 46.1 MB). Free memory was 63.7 MB in the beginning and 105.4 MB in the end (delta: -41.7 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.04 ms. Allocated memory is still 146.8 MB. Free memory is still 105.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function -2 * \old(x) + 211 and consists of 4 locations. One deterministic module has affine ranking function -2 * aux-f91(x+11)-aux + 201 and consists of 8 locations. One nondeterministic module has affine ranking function -2 * x + 189 and consists of 6 locations. One nondeterministic module has affine ranking function -1 * \old(x) + 90 and consists of 18 locations. One nondeterministic module has affine ranking function -2 * \old(x) + 201 and consists of 11 locations. 2 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 38.2s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 30.1s. Construction of modules took 1.0s. Büchi inclusion checks took 6.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 48 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 97 states and ocurred in iteration 4. Nontrivial modules had stage [2, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/24 HoareTripleCheckerStatistics: 181 SDtfs, 296 SDslu, 190 SDs, 0 SdLazy, 829 SolverSat, 238 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital15 mio100 ax100 hnf90 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf110 neg100 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 19ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 12 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 26.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...