./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/DivMinus2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/DivMinus2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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 64bit --witnessprinter.graph.data.programhash 4113f10404cd50c48db8fb998633f502f8a0b01a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:12:13,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:12:13,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:12:13,979 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:12:13,980 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:12:13,986 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:12:13,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:12:13,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:12:13,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:12:14,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:12:14,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:12:14,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:12:14,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:12:14,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:12:14,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:12:14,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:12:14,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:12:14,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:12:14,017 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:12:14,020 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:12:14,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:12:14,025 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:12:14,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:12:14,029 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:12:14,034 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:12:14,035 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:12:14,035 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:12:14,037 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:12:14,038 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:12:14,039 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:12:14,040 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:12:14,041 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:12:14,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:12:14,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:12:14,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:12:14,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:12:14,048 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:12:14,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:12:14,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:12:14,051 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:12:14,052 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:12:14,053 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-30 00:12:14,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:12:14,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:12:14,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:12:14,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:12:14,085 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:12:14,086 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-30 00:12:14,086 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-30 00:12:14,086 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-30 00:12:14,086 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-30 00:12:14,087 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-30 00:12:14,087 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-30 00:12:14,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:12:14,087 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:12:14,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:12:14,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:12:14,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-30 00:12:14,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-30 00:12:14,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-30 00:12:14,089 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 00:12:14,089 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-30 00:12:14,089 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:12:14,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-30 00:12:14,090 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:12:14,090 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:12:14,091 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-30 00:12:14,091 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:12:14,091 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:12:14,091 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:12:14,092 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-30 00:12:14,093 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-30 00:12:14,093 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_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4113f10404cd50c48db8fb998633f502f8a0b01a [2020-11-30 00:12:14,359 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:12:14,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:12:14,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:12:14,395 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:12:14,396 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:12:14,398 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/DivMinus2.c [2020-11-30 00:12:14,498 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/data/d18807a38/6171b2fb4a524a7c8283eb5d39535149/FLAG9d144c3a9 [2020-11-30 00:12:15,063 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:12:15,064 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/sv-benchmarks/c/termination-restricted-15/DivMinus2.c [2020-11-30 00:12:15,074 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/data/d18807a38/6171b2fb4a524a7c8283eb5d39535149/FLAG9d144c3a9 [2020-11-30 00:12:15,428 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/data/d18807a38/6171b2fb4a524a7c8283eb5d39535149 [2020-11-30 00:12:15,433 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:12:15,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 00:12:15,437 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:12:15,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:12:15,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:12:15,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187eaef3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15, skipping insertion in model container [2020-11-30 00:12:15,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:12:15,467 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:12:15,622 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:12:15,625 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:12:15,640 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:12:15,652 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:12:15,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15 WrapperNode [2020-11-30 00:12:15,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:12:15,654 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 00:12:15,654 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 00:12:15,654 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 00:12:15,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,706 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 00:12:15,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:12:15,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:12:15,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:12:15,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,719 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,722 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,725 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,739 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,740 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... [2020-11-30 00:12:15,742 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:12:15,744 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:12:15,744 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:12:15,745 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:12:15,746 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:15,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:12:15,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:12:16,008 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:12:16,009 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-30 00:12:16,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:12:16 BoogieIcfgContainer [2020-11-30 00:12:16,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:12:16,012 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-30 00:12:16,012 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-30 00:12:16,016 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-30 00:12:16,017 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:12:16,017 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 30.11 12:12:15" (1/3) ... [2020-11-30 00:12:16,019 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2d714825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:12:16, skipping insertion in model container [2020-11-30 00:12:16,019 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:12:16,019 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:12:15" (2/3) ... [2020-11-30 00:12:16,020 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2d714825 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 30.11 12:12:16, skipping insertion in model container [2020-11-30 00:12:16,020 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-30 00:12:16,020 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:12:16" (3/3) ... [2020-11-30 00:12:16,021 INFO L373 chiAutomizerObserver]: Analyzing ICFG DivMinus2.c [2020-11-30 00:12:16,073 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-30 00:12:16,074 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-30 00:12:16,074 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-30 00:12:16,074 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:12:16,074 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:12:16,074 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-30 00:12:16,075 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:12:16,075 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-30 00:12:16,087 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-30 00:12:16,102 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 00:12:16,103 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:16,103 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:16,109 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:12:16,109 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 00:12:16,109 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-30 00:12:16,110 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-30 00:12:16,111 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-30 00:12:16,111 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:16,111 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:16,111 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:12:16,112 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-11-30 00:12:16,118 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 7#L14-2true [2020-11-30 00:12:16,118 INFO L796 eck$LassoCheckResult]: Loop: 7#L14-2true assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 3#L17-2true assume !(0 != main_~ytmp~0); 11#L16-2true main_~res~0 := 1 + main_~res~0; 7#L14-2true [2020-11-30 00:12:16,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:16,124 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-30 00:12:16,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:16,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897157731] [2020-11-30 00:12:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:16,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,222 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash 39957, now seen corresponding path program 1 times [2020-11-30 00:12:16,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:16,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054729807] [2020-11-30 00:12:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:16,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:16,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054729807] [2020-11-30 00:12:16,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:12:16,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:12:16,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646352504] [2020-11-30 00:12:16,311 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-30 00:12:16,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:12:16,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:12:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:12:16,330 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-11-30 00:12:16,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:12:16,386 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2020-11-30 00:12:16,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:12:16,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2020-11-30 00:12:16,391 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-30 00:12:16,394 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 6 states and 8 transitions. [2020-11-30 00:12:16,395 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-11-30 00:12:16,396 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2020-11-30 00:12:16,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 8 transitions. [2020-11-30 00:12:16,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:12:16,409 INFO L691 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-30 00:12:16,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 8 transitions. [2020-11-30 00:12:16,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-30 00:12:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-30 00:12:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-11-30 00:12:16,470 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-30 00:12:16,471 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-11-30 00:12:16,471 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-30 00:12:16,471 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-11-30 00:12:16,472 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2020-11-30 00:12:16,472 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:16,472 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:16,472 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-30 00:12:16,473 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:12:16,473 INFO L794 eck$LassoCheckResult]: Stem: 30#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 31#L14-2 [2020-11-30 00:12:16,473 INFO L796 eck$LassoCheckResult]: Loop: 31#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 28#L17-2 assume !!(0 != main_~ytmp~0); 29#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 32#L17-2 assume !(0 != main_~ytmp~0); 33#L16-2 main_~res~0 := 1 + main_~res~0; 31#L14-2 [2020-11-30 00:12:16,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:16,474 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-30 00:12:16,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:16,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439539116] [2020-11-30 00:12:16,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:16,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,493 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,494 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:16,496 INFO L82 PathProgramCache]: Analyzing trace with hash 38452088, now seen corresponding path program 1 times [2020-11-30 00:12:16,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:16,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260939508] [2020-11-30 00:12:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,518 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,526 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,528 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:16,529 INFO L82 PathProgramCache]: Analyzing trace with hash 925955769, now seen corresponding path program 1 times [2020-11-30 00:12:16,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:16,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056361463] [2020-11-30 00:12:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:16,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:16,552 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:16,555 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:16,677 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 20 [2020-11-30 00:12:16,728 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:16,729 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:16,729 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:16,729 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:16,730 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:16,730 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:16,730 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:16,730 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:16,730 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration2_Loop [2020-11-30 00:12:16,731 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:16,731 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:16,749 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:16,757 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:16,771 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:16,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:16,940 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:16,941 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:16,950 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:16,950 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:16,958 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:16,958 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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 [2020-11-30 00:12:16,990 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:16,990 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:16,994 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:16,994 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:17,039 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:17,039 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:17,084 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:17,084 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,105 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:17,105 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~res~0=0} Honda state: {ULTIMATE.start_main_~res~0=0} Generalized eigenvectors: [{ULTIMATE.start_main_~res~0=-5}, {ULTIMATE.start_main_~res~0=6}, {ULTIMATE.start_main_~res~0=0}] Lambdas: [1, 1, 0] Nus: [0, 1] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,131 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:17,131 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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 [2020-11-30 00:12:17,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:17,167 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:17,473 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:17,475 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:17,475 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:17,475 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:17,475 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:17,475 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:17,475 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,475 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:17,475 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:17,475 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration2_Loop [2020-11-30 00:12:17,475 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:17,476 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:17,477 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:17,489 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:17,493 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:17,523 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:17,675 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:17,680 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,706 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:17,708 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:17,709 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:17,709 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:17,709 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:17,715 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:17,715 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:12:17,721 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) [2020-11-30 00:12:17,772 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:17,773 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:17,774 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:17,774 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:17,774 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:17,778 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:17,778 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,784 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:17,826 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:17,828 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:17,828 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:17,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:17,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:17,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:17,832 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:17,832 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,836 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:17,850 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-30 00:12:17,850 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) [2020-11-30 00:12:17,860 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:17,860 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:17,860 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:17,861 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:17,901 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:17,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:17,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:18,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:12:18,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:18,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:18,101 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 [2020-11-30 00:12:18,102 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 3 Second operand 4 states. [2020-11-30 00:12:18,157 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 3. Second operand 4 states. Result 23 states and 33 transitions. Complement of second has 7 states. [2020-11-30 00:12:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:18,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-30 00:12:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-30 00:12:18,161 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 5 letters. [2020-11-30 00:12:18,162 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:18,163 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 5 letters. [2020-11-30 00:12:18,163 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:18,163 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 10 letters. [2020-11-30 00:12:18,164 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:18,164 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 33 transitions. [2020-11-30 00:12:18,173 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-30 00:12:18,175 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 23 states and 33 transitions. [2020-11-30 00:12:18,176 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2020-11-30 00:12:18,176 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-11-30 00:12:18,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 33 transitions. [2020-11-30 00:12:18,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:18,177 INFO L691 BuchiCegarLoop]: Abstraction has 23 states and 33 transitions. [2020-11-30 00:12:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 33 transitions. [2020-11-30 00:12:18,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-30 00:12:18,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 00:12:18,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 29 transitions. [2020-11-30 00:12:18,183 INFO L714 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-30 00:12:18,183 INFO L594 BuchiCegarLoop]: Abstraction has 20 states and 29 transitions. [2020-11-30 00:12:18,183 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-30 00:12:18,183 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 29 transitions. [2020-11-30 00:12:18,184 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-30 00:12:18,184 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:18,184 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:18,185 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-30 00:12:18,185 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:12:18,185 INFO L794 eck$LassoCheckResult]: Stem: 104#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 105#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 110#L17-2 assume !!(0 != main_~ytmp~0); 106#L17 assume !(main_~ytmp~0 > 0);main_~ytmp~0 := 1 + main_~ytmp~0;main_~x~0 := 1 + main_~x~0; 107#L17-2 [2020-11-30 00:12:18,185 INFO L796 eck$LassoCheckResult]: Loop: 107#L17-2 assume !!(0 != main_~ytmp~0); 101#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 107#L17-2 [2020-11-30 00:12:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:18,186 INFO L82 PathProgramCache]: Analyzing trace with hash 963535, now seen corresponding path program 1 times [2020-11-30 00:12:18,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:18,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605331553] [2020-11-30 00:12:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:18,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:18,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605331553] [2020-11-30 00:12:18,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:12:18,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 00:12:18,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696758181] [2020-11-30 00:12:18,214 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:12:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1572, now seen corresponding path program 1 times [2020-11-30 00:12:18,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:18,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958467911] [2020-11-30 00:12:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:18,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:18,221 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:18,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:18,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:18,237 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:18,268 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:18,269 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:18,269 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:18,269 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:18,269 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:18,269 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,269 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:18,269 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:18,269 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration3_Loop [2020-11-30 00:12:18,269 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:18,269 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:18,271 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,296 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,387 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:18,387 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:18,392 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:18,392 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,397 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:18,397 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:18,442 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:18,442 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,447 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:18,447 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) [2020-11-30 00:12:18,496 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:18,497 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,531 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:18,531 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:18,570 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:18,571 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:18,571 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:18,571 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:18,572 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:18,572 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:18,572 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,572 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:18,572 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:18,572 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration3_Loop [2020-11-30 00:12:18,572 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:18,572 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:18,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,580 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,588 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,593 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:18,690 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:18,690 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,717 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:18,719 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:18,719 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:18,719 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:18,719 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:18,727 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:18,728 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:12:18,732 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) [2020-11-30 00:12:18,784 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:18,786 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:18,786 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:18,787 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:18,787 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:18,787 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:18,792 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:18,793 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 [2020-11-30 00:12:18,796 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:18,799 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:12:18,800 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:18,807 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:18,807 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:18,807 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:18,807 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:18,838 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:18,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:18,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:18,911 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:18,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:18,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:18,913 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-11-30 00:12:18,913 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 20 states and 29 transitions. cyclomatic complexity: 12 Second operand 3 states. [2020-11-30 00:12:18,988 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 20 states and 29 transitions. cyclomatic complexity: 12. Second operand 3 states. Result 28 states and 42 transitions. Complement of second has 5 states. [2020-11-30 00:12:18,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:12:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2020-11-30 00:12:18,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 4 letters. Loop has 2 letters. [2020-11-30 00:12:18,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:18,990 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 2 letters. [2020-11-30 00:12:18,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:18,990 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-30 00:12:18,990 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:18,990 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 42 transitions. [2020-11-30 00:12:18,993 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2020-11-30 00:12:18,994 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 26 states and 39 transitions. [2020-11-30 00:12:18,994 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-11-30 00:12:18,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-30 00:12:18,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 39 transitions. [2020-11-30 00:12:18,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:18,995 INFO L691 BuchiCegarLoop]: Abstraction has 26 states and 39 transitions. [2020-11-30 00:12:18,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 39 transitions. [2020-11-30 00:12:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-11-30 00:12:19,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 00:12:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 37 transitions. [2020-11-30 00:12:19,005 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2020-11-30 00:12:19,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:12:19,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:12:19,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:12:19,007 INFO L87 Difference]: Start difference. First operand 24 states and 37 transitions. Second operand 3 states. [2020-11-30 00:12:19,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:12:19,043 INFO L93 Difference]: Finished difference Result 25 states and 37 transitions. [2020-11-30 00:12:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:12:19,045 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 37 transitions. [2020-11-30 00:12:19,046 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-30 00:12:19,047 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 21 states and 31 transitions. [2020-11-30 00:12:19,047 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2020-11-30 00:12:19,047 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2020-11-30 00:12:19,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 31 transitions. [2020-11-30 00:12:19,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:19,048 INFO L691 BuchiCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-11-30 00:12:19,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states and 31 transitions. [2020-11-30 00:12:19,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 00:12:19,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 00:12:19,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-11-30 00:12:19,053 INFO L714 BuchiCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-11-30 00:12:19,053 INFO L594 BuchiCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-11-30 00:12:19,055 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-30 00:12:19,055 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 31 transitions. [2020-11-30 00:12:19,058 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-30 00:12:19,058 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:19,059 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:19,059 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2020-11-30 00:12:19,059 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:12:19,060 INFO L794 eck$LassoCheckResult]: Stem: 238#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 239#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 236#L17-2 assume !!(0 != main_~ytmp~0); 237#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 254#L17-2 assume !!(0 != main_~ytmp~0); 240#L17 [2020-11-30 00:12:19,060 INFO L796 eck$LassoCheckResult]: Loop: 240#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 241#L17-2 assume !!(0 != main_~ytmp~0); 240#L17 [2020-11-30 00:12:19,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:19,061 INFO L82 PathProgramCache]: Analyzing trace with hash 29869542, now seen corresponding path program 1 times [2020-11-30 00:12:19,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:19,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996626304] [2020-11-30 00:12:19,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,079 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,106 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:19,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:19,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1662, now seen corresponding path program 2 times [2020-11-30 00:12:19,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:19,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993909169] [2020-11-30 00:12:19,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,130 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,136 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:19,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:19,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1360140509, now seen corresponding path program 2 times [2020-11-30 00:12:19,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:19,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392351108] [2020-11-30 00:12:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,170 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,179 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,181 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:19,229 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:19,229 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:19,229 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:19,229 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:19,229 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:19,229 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:19,229 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:19,230 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:19,230 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration4_Loop [2020-11-30 00:12:19,230 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:19,230 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:19,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,250 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,256 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,261 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,373 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:19,373 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:19,386 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:19,386 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:19,443 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:19,443 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:19,514 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:19,516 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:19,516 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:19,516 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:19,517 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:19,517 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:19,517 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:19,517 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:19,517 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:19,517 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration4_Loop [2020-11-30 00:12:19,517 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:19,517 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:19,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,552 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,557 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:19,668 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:19,669 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) [2020-11-30 00:12:19,687 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:19,688 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:19,689 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:19,689 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:19,689 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:19,689 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:19,690 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:19,691 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:19,694 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:19,705 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-30 00:12:19,705 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:19,711 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:19,711 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:19,711 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:19,711 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] [2020-11-30 00:12:19,736 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:19,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:19,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:19,815 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-30 00:12:19,815 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 31 transitions. cyclomatic complexity: 14 Second operand 3 states. [2020-11-30 00:12:19,853 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 31 transitions. cyclomatic complexity: 14. Second operand 3 states. Result 36 states and 53 transitions. Complement of second has 5 states. [2020-11-30 00:12:19,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:19,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:12:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-11-30 00:12:19,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 2 letters. [2020-11-30 00:12:19,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:19,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2020-11-30 00:12:19,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:19,856 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 4 letters. [2020-11-30 00:12:19,856 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:19,856 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 53 transitions. [2020-11-30 00:12:19,859 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-30 00:12:19,860 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 33 states and 48 transitions. [2020-11-30 00:12:19,860 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2020-11-30 00:12:19,860 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 15 [2020-11-30 00:12:19,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 48 transitions. [2020-11-30 00:12:19,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:19,861 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 48 transitions. [2020-11-30 00:12:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 48 transitions. [2020-11-30 00:12:19,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-30 00:12:19,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 00:12:19,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2020-11-30 00:12:19,864 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-30 00:12:19,864 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-30 00:12:19,864 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-30 00:12:19,865 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 42 transitions. [2020-11-30 00:12:19,866 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2020-11-30 00:12:19,866 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:19,866 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:19,870 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-11-30 00:12:19,871 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1] [2020-11-30 00:12:19,871 INFO L794 eck$LassoCheckResult]: Stem: 338#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 339#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 343#L17-2 assume !!(0 != main_~ytmp~0); 358#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 357#L17-2 assume !!(0 != main_~ytmp~0); 337#L17 assume !(main_~ytmp~0 > 0);main_~ytmp~0 := 1 + main_~ytmp~0;main_~x~0 := 1 + main_~x~0; 354#L17-2 assume !(0 != main_~ytmp~0); 346#L16-2 [2020-11-30 00:12:19,871 INFO L796 eck$LassoCheckResult]: Loop: 346#L16-2 main_~res~0 := 1 + main_~res~0; 347#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 356#L17-2 assume !!(0 != main_~ytmp~0); 355#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 352#L17-2 assume !(0 != main_~ytmp~0); 346#L16-2 [2020-11-30 00:12:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:19,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1360140449, now seen corresponding path program 1 times [2020-11-30 00:12:19,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669972318] [2020-11-30 00:12:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:19,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:19,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669972318] [2020-11-30 00:12:19,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:12:19,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:12:19,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567784170] [2020-11-30 00:12:19,934 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:12:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash 55728128, now seen corresponding path program 2 times [2020-11-30 00:12:19,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:19,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774927727] [2020-11-30 00:12:19,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,941 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:19,946 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:19,948 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:20,079 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:20,079 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:20,079 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:20,079 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:20,079 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:20,079 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:20,080 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:20,080 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:20,080 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration5_Loop [2020-11-30 00:12:20,080 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:20,080 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:20,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,093 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,112 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,204 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:20,204 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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 [2020-11-30 00:12:20,208 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:20,208 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:20,211 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-30 00:12:20,211 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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 [2020-11-30 00:12:20,238 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:20,238 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:20,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:20,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:20,523 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:20,525 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:20,525 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:20,525 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:20,526 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:20,526 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:20,526 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:20,526 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:20,526 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:20,526 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration5_Loop [2020-11-30 00:12:20,526 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:20,526 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:20,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,550 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,555 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:20,632 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:20,632 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:20,642 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:20,643 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:20,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:20,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:20,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:20,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:20,648 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:20,648 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-30 00:12:20,650 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:20,662 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-11-30 00:12:20,662 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 2 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:20,666 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:20,666 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:20,666 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:20,666 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2020-11-30 00:12:20,691 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:20,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:20,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:20,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:20,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 00:12:20,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:20,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:20,786 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 [2020-11-30 00:12:20,786 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 19 Second operand 5 states. [2020-11-30 00:12:20,811 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 19. Second operand 5 states. Result 63 states and 95 transitions. Complement of second has 7 states. [2020-11-30 00:12:20,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-30 00:12:20,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2020-11-30 00:12:20,814 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 7 letters. Loop has 5 letters. [2020-11-30 00:12:20,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:20,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 12 letters. Loop has 5 letters. [2020-11-30 00:12:20,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:20,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 7 letters. Loop has 10 letters. [2020-11-30 00:12:20,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:20,816 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 95 transitions. [2020-11-30 00:12:20,818 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 12 [2020-11-30 00:12:20,820 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 48 states and 74 transitions. [2020-11-30 00:12:20,820 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-11-30 00:12:20,820 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2020-11-30 00:12:20,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2020-11-30 00:12:20,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:20,820 INFO L691 BuchiCegarLoop]: Abstraction has 48 states and 74 transitions. [2020-11-30 00:12:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2020-11-30 00:12:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-11-30 00:12:20,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-30 00:12:20,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 68 transitions. [2020-11-30 00:12:20,826 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 68 transitions. [2020-11-30 00:12:20,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:12:20,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:12:20,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:12:20,827 INFO L87 Difference]: Start difference. First operand 44 states and 68 transitions. Second operand 4 states. [2020-11-30 00:12:20,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:12:20,844 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2020-11-30 00:12:20,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:12:20,845 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 24 transitions. [2020-11-30 00:12:20,846 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:12:20,846 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 14 states and 18 transitions. [2020-11-30 00:12:20,847 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-11-30 00:12:20,847 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-11-30 00:12:20,847 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 18 transitions. [2020-11-30 00:12:20,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-30 00:12:20,847 INFO L691 BuchiCegarLoop]: Abstraction has 14 states and 18 transitions. [2020-11-30 00:12:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 18 transitions. [2020-11-30 00:12:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2020-11-30 00:12:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-30 00:12:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2020-11-30 00:12:20,849 INFO L714 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-11-30 00:12:20,849 INFO L594 BuchiCegarLoop]: Abstraction has 12 states and 15 transitions. [2020-11-30 00:12:20,849 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-30 00:12:20,849 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 15 transitions. [2020-11-30 00:12:20,850 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-11-30 00:12:20,850 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-30 00:12:20,850 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-30 00:12:20,851 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1] [2020-11-30 00:12:20,851 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-11-30 00:12:20,851 INFO L794 eck$LassoCheckResult]: Stem: 551#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x~0, main_~y~0, main_~ytmp~0, main_~res~0;havoc main_~x~0;havoc main_~y~0;havoc main_~ytmp~0;havoc main_~res~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~y~0 := main_#t~nondet1;havoc main_#t~nondet1;main_~res~0 := 0; 552#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 549#L17-2 assume !!(0 != main_~ytmp~0); 550#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 553#L17-2 assume !(0 != main_~ytmp~0); 556#L16-2 main_~res~0 := 1 + main_~res~0; 554#L14-2 assume !!(main_~x~0 >= main_~y~0 && main_~y~0 > 0);main_~ytmp~0 := main_~y~0; 555#L17-2 assume !!(0 != main_~ytmp~0); 558#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 557#L17-2 assume !!(0 != main_~ytmp~0); 548#L17 [2020-11-30 00:12:20,851 INFO L796 eck$LassoCheckResult]: Loop: 548#L17 assume main_~ytmp~0 > 0;main_~ytmp~0 := main_~ytmp~0 - 1;main_~x~0 := main_~x~0 - 1; 547#L17-2 assume !!(0 != main_~ytmp~0); 548#L17 [2020-11-30 00:12:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1275475969, now seen corresponding path program 2 times [2020-11-30 00:12:20,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:20,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538802590] [2020-11-30 00:12:20,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:20,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538802590] [2020-11-30 00:12:20,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333348151] [2020-11-30 00:12:20,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:12:20,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:12:20,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:12:20,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 00:12:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:21,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:12:21,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-11-30 00:12:21,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114618461] [2020-11-30 00:12:21,058 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-30 00:12:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1662, now seen corresponding path program 3 times [2020-11-30 00:12:21,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:12:21,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74261531] [2020-11-30 00:12:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:12:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:21,063 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:12:21,066 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:12:21,067 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:12:21,119 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:21,119 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:21,119 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:21,119 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:21,119 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-30 00:12:21,119 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:21,119 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:21,119 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:21,119 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration6_Loop [2020-11-30 00:12:21,119 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:21,119 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:21,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,137 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,145 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,240 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:21,241 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:21,248 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-30 00:12:21,248 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:21,284 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-30 00:12:21,284 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-30 00:12:21,356 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-30 00:12:21,357 INFO L210 LassoAnalysis]: Preferences: [2020-11-30 00:12:21,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-30 00:12:21,357 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-30 00:12:21,357 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-30 00:12:21,357 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-30 00:12:21,358 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:21,358 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-30 00:12:21,358 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-30 00:12:21,358 INFO L133 ssoRankerPreferences]: Filename of dumped script: DivMinus2.c_Iteration6_Loop [2020-11-30 00:12:21,358 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-30 00:12:21,358 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-30 00:12:21,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,362 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-30 00:12:21,449 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-30 00:12:21,449 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/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) [2020-11-30 00:12:21,455 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:21,457 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:21,458 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:21,458 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:21,458 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:21,460 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-30 00:12:21,461 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-30 00:12:21,465 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:21,514 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-30 00:12:21,516 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-30 00:12:21,516 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-30 00:12:21,516 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-30 00:12:21,516 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-30 00:12:21,516 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-30 00:12:21,518 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-30 00:12:21,518 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:21,522 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-30 00:12:21,525 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-30 00:12:21,526 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ec179006-31a0-4f97-ba99-44e7d1f6f51f/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-30 00:12:21,529 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-30 00:12:21,529 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-30 00:12:21,529 INFO L510 LassoAnalysis]: Proved termination. [2020-11-30 00:12:21,529 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~ytmp~0) = 1*ULTIMATE.start_main_~ytmp~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-30 00:12:21,567 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-30 00:12:21,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:21,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:21,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:21,648 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:21,669 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-30 00:12:21,669 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-30 00:12:21,686 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 20 states and 24 transitions. Complement of second has 5 states. [2020-11-30 00:12:21,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:21,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:12:21,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-11-30 00:12:21,688 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 10 letters. Loop has 2 letters. [2020-11-30 00:12:21,688 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:21,688 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:12:21,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:21,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:21,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:21,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:21,728 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:21,750 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-30 00:12:21,750 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-30 00:12:21,782 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 19 states and 23 transitions. Complement of second has 5 states. [2020-11-30 00:12:21,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:21,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:12:21,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 7 transitions. [2020-11-30 00:12:21,786 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 7 transitions. Stem has 10 letters. Loop has 2 letters. [2020-11-30 00:12:21,786 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:21,786 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-30 00:12:21,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:12:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 00:12:21,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:12:21,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:12:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:12:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:12:21,871 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2020-11-30 00:12:21,871 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-11-30 00:12:21,892 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 15 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 19 states and 24 transitions. Complement of second has 6 states. [2020-11-30 00:12:21,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-11-30 00:12:21,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-30 00:12:21,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 12 transitions. [2020-11-30 00:12:21,897 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 2 letters. [2020-11-30 00:12:21,897 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:21,897 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 12 letters. Loop has 2 letters. [2020-11-30 00:12:21,898 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:21,898 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 12 transitions. Stem has 10 letters. Loop has 4 letters. [2020-11-30 00:12:21,898 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-30 00:12:21,899 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 24 transitions. [2020-11-30 00:12:21,899 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:12:21,900 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 0 states and 0 transitions. [2020-11-30 00:12:21,900 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:12:21,900 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:12:21,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:12:21,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:12:21,900 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:21,900 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:21,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:12:21,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 00:12:21,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:12:21,902 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 10 states. [2020-11-30 00:12:21,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:12:21,902 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-11-30 00:12:21,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 00:12:21,902 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-11-30 00:12:21,902 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:12:21,903 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 00:12:21,903 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-11-30 00:12:21,903 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-11-30 00:12:21,903 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-11-30 00:12:21,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-30 00:12:21,903 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:21,903 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:21,903 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 00:12:21,903 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-30 00:12:21,904 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-11-30 00:12:21,904 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-11-30 00:12:21,904 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-11-30 00:12:21,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 30.11 12:12:21 BoogieIcfgContainer [2020-11-30 00:12:21,915 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-30 00:12:21,915 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:12:21,916 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:12:21,916 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:12:21,916 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:12:16" (3/4) ... [2020-11-30 00:12:21,920 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 00:12:21,920 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:12:21,922 INFO L168 Benchmark]: Toolchain (without parser) took 6486.20 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 75.8 MB in the beginning and 45.0 MB in the end (delta: 30.8 MB). Peak memory consumption was 56.9 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:21,923 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:12:21,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 216.43 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 78.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:21,926 INFO L168 Benchmark]: Boogie Procedure Inliner took 53.04 ms. Allocated memory is still 102.8 MB. Free memory was 78.8 MB in the beginning and 77.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:21,927 INFO L168 Benchmark]: Boogie Preprocessor took 34.70 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.6 MB in the end (delta: 860.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:12:21,933 INFO L168 Benchmark]: RCFGBuilder took 267.37 ms. Allocated memory is still 102.8 MB. Free memory was 76.4 MB in the beginning and 68.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:21,934 INFO L168 Benchmark]: BuchiAutomizer took 5903.06 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 68.0 MB in the beginning and 45.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. [2020-11-30 00:12:21,934 INFO L168 Benchmark]: Witness Printer took 4.93 ms. Allocated memory is still 130.0 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:12:21,938 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 62.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 216.43 ms. Allocated memory is still 102.8 MB. Free memory was 75.6 MB in the beginning and 78.8 MB in the end (delta: -3.2 MB). Peak memory consumption was 8.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 53.04 ms. Allocated memory is still 102.8 MB. Free memory was 78.8 MB in the beginning and 77.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.70 ms. Allocated memory is still 102.8 MB. Free memory was 77.5 MB in the beginning and 76.6 MB in the end (delta: 860.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 267.37 ms. Allocated memory is still 102.8 MB. Free memory was 76.4 MB in the beginning and 68.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 5903.06 ms. Allocated memory was 102.8 MB in the beginning and 130.0 MB in the end (delta: 27.3 MB). Free memory was 68.0 MB in the beginning and 45.0 MB in the end (delta: 23.0 MB). Peak memory consumption was 52.3 MB. Max. memory is 16.1 GB. * Witness Printer took 4.93 ms. Allocated memory is still 130.0 MB. Free memory is still 45.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 9 terminating modules (4 trivial, 4 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 4 locations. One deterministic module has affine ranking function ytmp and consists of 3 locations. One deterministic module has affine ranking function ytmp and consists of 3 locations. One deterministic module has affine ranking function x and consists of 4 locations. One nondeterministic module has affine ranking function ytmp and consists of 3 locations. 4 modules have a trivial ranking function, the largest among these consists of 10 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 5.8s and 7 iterations. TraceHistogramMax:3. Analysis of lassos took 4.5s. Construction of modules took 0.2s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 16 StatesRemovedByMinimization, 5 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 4. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 62 SDtfs, 53 SDslu, 23 SDs, 0 SdLazy, 76 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT3 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax162 hnf100 lsp46 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq176 hnf93 smp87 dnf100 smp100 tf110 neg97 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 39ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...