./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/UpAndDown.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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/UpAndDown.c -s /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/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 014f994c3374ea132faaa71956bb80ddfc4c8f9b 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 18:49:41,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 18:49:41,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 18:49:41,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 18:49:41,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 18:49:41,529 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 18:49:41,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 18:49:41,535 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 18:49:41,542 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 18:49:41,543 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 18:49:41,544 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 18:49:41,545 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 18:49:41,546 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 18:49:41,547 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 18:49:41,548 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 18:49:41,559 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 18:49:41,560 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 18:49:41,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 18:49:41,567 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 18:49:41,574 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 18:49:41,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 18:49:41,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 18:49:41,580 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 18:49:41,581 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 18:49:41,590 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 18:49:41,590 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 18:49:41,591 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 18:49:41,592 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 18:49:41,593 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 18:49:41,594 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 18:49:41,594 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 18:49:41,595 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 18:49:41,597 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 18:49:41,598 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 18:49:41,599 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 18:49:41,599 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 18:49:41,600 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 18:49:41,600 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 18:49:41,601 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 18:49:41,601 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 18:49:41,603 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 18:49:41,605 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 18:49:41,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 18:49:41,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 18:49:41,644 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 18:49:41,644 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 18:49:41,644 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 18:49:41,644 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 18:49:41,644 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 18:49:41,645 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 18:49:41,645 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 18:49:41,645 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 18:49:41,646 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 18:49:41,646 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 18:49:41,647 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 18:49:41,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 18:49:41,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 18:49:41,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 18:49:41,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 18:49:41,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 18:49:41,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 18:49:41,648 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 18:49:41,648 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 18:49:41,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 18:49:41,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 18:49:41,649 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 18:49:41,649 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 18:49:41,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 18:49:41,650 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 18:49:41,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 18:49:41,650 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 18:49:41,651 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 18:49:41,652 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 014f994c3374ea132faaa71956bb80ddfc4c8f9b [2020-11-29 18:49:41,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 18:49:41,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 18:49:41,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 18:49:41,975 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 18:49:41,976 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 18:49:41,976 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/UpAndDown.c [2020-11-29 18:49:42,063 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/data/1dbdfbb26/0f7e6eef9d5a4627a00d127c494b2ae3/FLAG2f564cf73 [2020-11-29 18:49:42,595 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 18:49:42,595 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/sv-benchmarks/c/termination-restricted-15/UpAndDown.c [2020-11-29 18:49:42,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/data/1dbdfbb26/0f7e6eef9d5a4627a00d127c494b2ae3/FLAG2f564cf73 [2020-11-29 18:49:42,967 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/data/1dbdfbb26/0f7e6eef9d5a4627a00d127c494b2ae3 [2020-11-29 18:49:42,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 18:49:42,971 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 18:49:42,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 18:49:42,973 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 18:49:42,977 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 18:49:42,977 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:49:42" (1/1) ... [2020-11-29 18:49:42,980 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3eb9a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:42, skipping insertion in model container [2020-11-29 18:49:42,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:49:42" (1/1) ... [2020-11-29 18:49:42,988 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 18:49:43,001 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 18:49:43,131 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:49:43,134 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 18:49:43,147 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 18:49:43,163 INFO L208 MainTranslator]: Completed translation [2020-11-29 18:49:43,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43 WrapperNode [2020-11-29 18:49:43,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 18:49:43,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 18:49:43,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 18:49:43,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 18:49:43,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,222 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 18:49:43,223 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 18:49:43,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 18:49:43,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 18:49:43,232 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,232 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,234 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... [2020-11-29 18:49:43,240 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 18:49:43,241 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 18:49:43,241 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 18:49:43,241 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 18:49:43,242 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:43,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 18:49:43,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 18:49:43,467 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 18:49:43,467 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 18:49:43,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:49:43 BoogieIcfgContainer [2020-11-29 18:49:43,469 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 18:49:43,470 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 18:49:43,470 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 18:49:43,474 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 18:49:43,475 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:49:43,475 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 06:49:42" (1/3) ... [2020-11-29 18:49:43,476 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@533c7008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:49:43, skipping insertion in model container [2020-11-29 18:49:43,476 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:49:43,476 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:49:43" (2/3) ... [2020-11-29 18:49:43,477 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@533c7008 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 06:49:43, skipping insertion in model container [2020-11-29 18:49:43,477 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 18:49:43,478 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:49:43" (3/3) ... [2020-11-29 18:49:43,479 INFO L373 chiAutomizerObserver]: Analyzing ICFG UpAndDown.c [2020-11-29 18:49:43,559 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 18:49:43,559 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 18:49:43,559 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 18:49:43,559 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 18:49:43,559 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 18:49:43,560 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 18:49:43,560 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 18:49:43,560 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 18:49:43,572 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-29 18:49:43,589 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 18:49:43,590 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:43,590 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:43,595 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 18:49:43,595 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:43,596 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 18:49:43,596 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-29 18:49:43,597 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 18:49:43,597 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:43,598 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:43,598 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 18:49:43,598 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:43,605 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 5#L18-1true [2020-11-29 18:49:43,605 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-1true assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6#L12true assume 10 == main_~i~0;main_~up~0 := 0; 3#L12-2true assume 0 == main_~i~0;main_~up~0 := 1; 9#L15-1true assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5#L18-1true [2020-11-29 18:49:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:43,611 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 18:49:43,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:43,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645236167] [2020-11-29 18:49:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:43,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:43,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:43,706 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:43,723 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash 1234538, now seen corresponding path program 1 times [2020-11-29 18:49:43,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:43,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947077154] [2020-11-29 18:49:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:43,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:43,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947077154] [2020-11-29 18:49:43,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:49:43,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:49:43,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441084653] [2020-11-29 18:49:43,817 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:43,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:43,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:49:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:49:43,836 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-11-29 18:49:44,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:44,011 INFO L93 Difference]: Finished difference Result 17 states and 22 transitions. [2020-11-29 18:49:44,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:49:44,014 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 22 transitions. [2020-11-29 18:49:44,015 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 18:49:44,024 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 9 states and 14 transitions. [2020-11-29 18:49:44,025 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 18:49:44,026 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-11-29 18:49:44,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 14 transitions. [2020-11-29 18:49:44,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 18:49:44,027 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-11-29 18:49:44,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 14 transitions. [2020-11-29 18:49:44,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 18:49:44,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 18:49:44,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 14 transitions. [2020-11-29 18:49:44,055 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-11-29 18:49:44,055 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 14 transitions. [2020-11-29 18:49:44,055 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 18:49:44,055 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 14 transitions. [2020-11-29 18:49:44,057 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 18:49:44,058 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:44,058 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:44,058 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 18:49:44,058 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:44,059 INFO L794 eck$LassoCheckResult]: Stem: 37#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 38#L18-1 [2020-11-29 18:49:44,059 INFO L796 eck$LassoCheckResult]: Loop: 38#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 43#L12 assume 10 == main_~i~0;main_~up~0 := 0; 35#L12-2 assume !(0 == main_~i~0); 36#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 38#L18-1 [2020-11-29 18:49:44,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:44,069 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-29 18:49:44,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:44,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593542007] [2020-11-29 18:49:44,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:44,078 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:44,082 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:44,086 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:44,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:44,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1234602, now seen corresponding path program 1 times [2020-11-29 18:49:44,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:44,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165270611] [2020-11-29 18:49:44,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:44,104 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:44,115 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:44,117 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:44,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:44,118 INFO L82 PathProgramCache]: Analyzing trace with hash 29863753, now seen corresponding path program 1 times [2020-11-29 18:49:44,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:44,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718559877] [2020-11-29 18:49:44,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:44,126 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:44,131 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:44,133 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:44,195 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:44,196 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:44,196 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:44,197 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:44,197 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:44,197 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,197 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:44,197 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:44,198 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration2_Loop [2020-11-29 18:49:44,198 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:44,198 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:44,216 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,234 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,339 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:44,340 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,379 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:44,380 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:44,394 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:44,394 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:44,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:44,431 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,435 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:44,435 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/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) [2020-11-29 18:49:44,474 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:44,474 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,479 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:44,479 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,533 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:44,534 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,561 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:44,561 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:44,594 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:44,625 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:44,625 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:44,625 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:44,625 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:44,625 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:44,625 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,626 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:44,626 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:44,626 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration2_Loop [2020-11-29 18:49:44,626 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:44,626 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:44,628 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,675 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,680 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:44,768 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:44,771 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,777 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:44,778 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:44,779 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:44,779 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:44,779 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:44,784 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:44,784 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:44,790 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:44,835 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,836 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:44,836 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:44,837 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:44,837 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:44,840 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:44,840 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:44,846 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:44,891 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:44,893 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:44,893 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:44,893 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:44,893 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:44,894 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:44,895 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:44,895 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,900 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,923 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:44,924 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:44,924 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:44,925 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:44,925 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:44,925 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:44,926 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:44,927 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:44,929 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:44,935 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:44,936 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/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) [2020-11-29 18:49:44,957 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:44,957 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:44,957 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:44,958 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:44,991 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:45,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:45,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:45,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:45,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:45,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:45,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:45,059 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 [2020-11-29 18:49:45,059 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 14 transitions. cyclomatic complexity: 6 Second operand 4 states. [2020-11-29 18:49:45,109 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 14 transitions. cyclomatic complexity: 6. Second operand 4 states. Result 24 states and 37 transitions. Complement of second has 7 states. [2020-11-29 18:49:45,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:49:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2020-11-29 18:49:45,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 1 letters. Loop has 4 letters. [2020-11-29 18:49:45,112 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:45,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 4 letters. [2020-11-29 18:49:45,113 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:45,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 1 letters. Loop has 8 letters. [2020-11-29 18:49:45,113 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:45,113 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 37 transitions. [2020-11-29 18:49:45,115 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-11-29 18:49:45,116 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 37 transitions. [2020-11-29 18:49:45,116 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-11-29 18:49:45,116 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 18:49:45,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 37 transitions. [2020-11-29 18:49:45,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:45,116 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 37 transitions. [2020-11-29 18:49:45,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 37 transitions. [2020-11-29 18:49:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-29 18:49:45,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 18:49:45,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 35 transitions. [2020-11-29 18:49:45,120 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 35 transitions. [2020-11-29 18:49:45,120 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 35 transitions. [2020-11-29 18:49:45,120 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 18:49:45,120 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 35 transitions. [2020-11-29 18:49:45,121 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-11-29 18:49:45,121 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:45,121 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:45,122 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:49:45,122 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:45,122 INFO L794 eck$LassoCheckResult]: Stem: 111#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 112#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 122#L12 [2020-11-29 18:49:45,122 INFO L796 eck$LassoCheckResult]: Loop: 122#L12 assume !(10 == main_~i~0); 125#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 128#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 126#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 122#L12 [2020-11-29 18:49:45,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:45,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 18:49:45,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:45,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112422757] [2020-11-29 18:49:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,127 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,129 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,131 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:45,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:45,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1389492, now seen corresponding path program 1 times [2020-11-29 18:49:45,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:45,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830919607] [2020-11-29 18:49:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:45,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:45,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830919607] [2020-11-29 18:49:45,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:49:45,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:49:45,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842929598] [2020-11-29 18:49:45,147 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:45,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:45,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:49:45,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:49:45,148 INFO L87 Difference]: Start difference. First operand 23 states and 35 transitions. cyclomatic complexity: 15 Second operand 3 states. [2020-11-29 18:49:45,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:45,159 INFO L93 Difference]: Finished difference Result 31 states and 44 transitions. [2020-11-29 18:49:45,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:49:45,159 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 44 transitions. [2020-11-29 18:49:45,161 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-11-29 18:49:45,162 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 30 states and 43 transitions. [2020-11-29 18:49:45,162 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 23 [2020-11-29 18:49:45,163 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 23 [2020-11-29 18:49:45,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 43 transitions. [2020-11-29 18:49:45,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:45,163 INFO L691 BuchiCegarLoop]: Abstraction has 30 states and 43 transitions. [2020-11-29 18:49:45,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states and 43 transitions. [2020-11-29 18:49:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-11-29 18:49:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 18:49:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 40 transitions. [2020-11-29 18:49:45,168 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 40 transitions. [2020-11-29 18:49:45,168 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 40 transitions. [2020-11-29 18:49:45,168 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 18:49:45,168 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 40 transitions. [2020-11-29 18:49:45,169 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-11-29 18:49:45,169 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:45,170 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:45,170 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 18:49:45,170 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:45,170 INFO L794 eck$LassoCheckResult]: Stem: 171#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 172#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 177#L12 [2020-11-29 18:49:45,170 INFO L796 eck$LassoCheckResult]: Loop: 177#L12 assume !(10 == main_~i~0); 178#L12-2 assume !(0 == main_~i~0); 188#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 187#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 177#L12 [2020-11-29 18:49:45,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:45,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 2 times [2020-11-29 18:49:45,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:45,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754214214] [2020-11-29 18:49:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,175 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,178 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,179 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:45,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:45,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1391414, now seen corresponding path program 1 times [2020-11-29 18:49:45,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:45,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432768966] [2020-11-29 18:49:45,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,185 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,188 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,189 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:45,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:45,190 INFO L82 PathProgramCache]: Analyzing trace with hash 925835935, now seen corresponding path program 1 times [2020-11-29 18:49:45,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:45,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468670570] [2020-11-29 18:49:45,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,196 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:45,200 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:45,201 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:45,236 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:45,236 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:45,237 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:45,237 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:45,237 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:45,237 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,237 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:45,237 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:45,237 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration4_Loop [2020-11-29 18:49:45,237 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:45,237 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:45,239 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,245 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,248 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,354 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:45,355 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:45,379 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:45,379 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 [2020-11-29 18:49:45,383 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:45,383 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:45,407 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:45,435 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:45,436 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,466 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:45,466 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:45,469 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:45,469 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=-8} Honda state: {ULTIMATE.start_main_~up~0=-8} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/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 [2020-11-29 18:49:45,493 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:45,493 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:45,547 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:45,700 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:45,701 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:45,701 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:45,701 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:45,702 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:45,702 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:45,702 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,702 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:45,702 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:45,702 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration4_Loop [2020-11-29 18:49:45,702 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:45,702 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:45,704 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:45,868 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:45,868 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:45,887 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:45,888 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:45,888 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:45,889 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:45,889 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:45,891 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:45,892 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,900 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,940 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:45,942 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:45,942 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:45,942 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:45,942 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:45,942 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:45,944 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:45,944 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:45,954 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:45,980 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:45,981 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:45,981 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:45,981 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:45,981 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:45,984 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:45,984 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:45,988 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/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 [2020-11-29 18:49:46,012 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:46,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:46,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:46,014 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:46,014 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:46,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:46,027 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:46,027 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:46,034 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:46,052 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:46,052 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:46,059 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:46,059 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:46,060 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:46,060 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,093 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:46,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:46,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:46,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:46,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:46,152 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 [2020-11-29 18:49:46,152 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states and 40 transitions. cyclomatic complexity: 16 Second operand 4 states. [2020-11-29 18:49:46,187 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states and 40 transitions. cyclomatic complexity: 16. Second operand 4 states. Result 43 states and 59 transitions. Complement of second has 7 states. [2020-11-29 18:49:46,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:46,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:49:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2020-11-29 18:49:46,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 4 letters. [2020-11-29 18:49:46,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:46,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2020-11-29 18:49:46,188 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:46,188 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 2 letters. Loop has 8 letters. [2020-11-29 18:49:46,189 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:46,189 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 59 transitions. [2020-11-29 18:49:46,191 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:49:46,192 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 33 states and 48 transitions. [2020-11-29 18:49:46,192 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2020-11-29 18:49:46,193 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2020-11-29 18:49:46,193 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 48 transitions. [2020-11-29 18:49:46,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:46,193 INFO L691 BuchiCegarLoop]: Abstraction has 33 states and 48 transitions. [2020-11-29 18:49:46,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 48 transitions. [2020-11-29 18:49:46,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-11-29 18:49:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-29 18:49:46,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 42 transitions. [2020-11-29 18:49:46,197 INFO L714 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-29 18:49:46,197 INFO L594 BuchiCegarLoop]: Abstraction has 28 states and 42 transitions. [2020-11-29 18:49:46,197 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 18:49:46,197 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 42 transitions. [2020-11-29 18:49:46,198 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:49:46,198 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:46,198 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:46,198 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 18:49:46,198 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:46,198 INFO L794 eck$LassoCheckResult]: Stem: 283#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 284#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 289#L12 assume 10 == main_~i~0;main_~up~0 := 0; 279#L12-2 [2020-11-29 18:49:46,198 INFO L796 eck$LassoCheckResult]: Loop: 279#L12-2 assume !(0 == main_~i~0); 280#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 285#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 286#L12 assume !(10 == main_~i~0); 279#L12-2 [2020-11-29 18:49:46,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:46,199 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-11-29 18:49:46,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:46,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179172890] [2020-11-29 18:49:46,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:46,203 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:46,206 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:46,207 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:46,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1573482, now seen corresponding path program 1 times [2020-11-29 18:49:46,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:46,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408072280] [2020-11-29 18:49:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:46,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:46,214 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:46,215 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:46,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:46,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1365706036, now seen corresponding path program 1 times [2020-11-29 18:49:46,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:46,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198035451] [2020-11-29 18:49:46,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:46,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:46,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198035451] [2020-11-29 18:49:46,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:49:46,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:49:46,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098010120] [2020-11-29 18:49:46,308 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:46,309 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:46,309 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:46,309 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:46,309 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:46,309 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,309 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:46,309 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:46,309 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration5_Loop [2020-11-29 18:49:46,309 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:46,309 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:46,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,477 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:46,477 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:46,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:46,488 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,492 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:46,492 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:46,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:46,529 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,532 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:46,532 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,554 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:46,554 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/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 [2020-11-29 18:49:46,577 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:46,577 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:46,616 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:46,618 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:46,618 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:46,618 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:46,618 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:46,618 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:46,618 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,618 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:46,618 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:46,618 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration5_Loop [2020-11-29 18:49:46,618 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:46,618 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:46,620 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,629 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,652 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,656 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:46,817 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:46,817 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:46,820 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:46,822 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:46,822 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:46,822 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:46,823 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:46,823 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:46,823 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:46,824 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,825 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:46,863 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:46,864 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:46,864 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:46,865 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:46,865 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:46,865 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:46,867 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:46,868 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,874 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:46,878 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:46,878 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:46,881 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:46,881 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:46,881 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:46,881 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 17 Supporting invariants [] Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:46,915 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:46,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:46,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:46,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:46,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:49:46,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:46,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:46,990 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2020-11-29 18:49:46,990 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 17 Second operand 5 states. [2020-11-29 18:49:47,087 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 42 transitions. cyclomatic complexity: 17. Second operand 5 states. Result 78 states and 116 transitions. Complement of second has 9 states. [2020-11-29 18:49:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:49:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 22 transitions. [2020-11-29 18:49:47,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 18:49:47,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:47,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 18:49:47,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:47,093 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 22 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 18:49:47,093 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:47,093 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 78 states and 116 transitions. [2020-11-29 18:49:47,095 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 31 [2020-11-29 18:49:47,096 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 78 states to 77 states and 115 transitions. [2020-11-29 18:49:47,096 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-11-29 18:49:47,097 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 40 [2020-11-29 18:49:47,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 115 transitions. [2020-11-29 18:49:47,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:47,097 INFO L691 BuchiCegarLoop]: Abstraction has 77 states and 115 transitions. [2020-11-29 18:49:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 115 transitions. [2020-11-29 18:49:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2020-11-29 18:49:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 18:49:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 98 transitions. [2020-11-29 18:49:47,108 INFO L714 BuchiCegarLoop]: Abstraction has 63 states and 98 transitions. [2020-11-29 18:49:47,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:47,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 18:49:47,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 18:49:47,109 INFO L87 Difference]: Start difference. First operand 63 states and 98 transitions. Second operand 3 states. [2020-11-29 18:49:47,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:47,119 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2020-11-29 18:49:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 18:49:47,120 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 44 states and 60 transitions. [2020-11-29 18:49:47,121 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 14 [2020-11-29 18:49:47,122 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 44 states to 37 states and 50 transitions. [2020-11-29 18:49:47,122 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2020-11-29 18:49:47,122 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2020-11-29 18:49:47,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2020-11-29 18:49:47,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:47,122 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2020-11-29 18:49:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2020-11-29 18:49:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2020-11-29 18:49:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:49:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2020-11-29 18:49:47,125 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2020-11-29 18:49:47,125 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 33 transitions. [2020-11-29 18:49:47,125 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 18:49:47,125 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 33 transitions. [2020-11-29 18:49:47,126 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 18:49:47,126 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:47,126 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:47,129 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 18:49:47,129 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:47,130 INFO L794 eck$LassoCheckResult]: Stem: 546#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 547#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 557#L12 assume !(10 == main_~i~0); 553#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 558#L15-1 [2020-11-29 18:49:47,130 INFO L796 eck$LassoCheckResult]: Loop: 558#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 559#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 563#L12 assume !(10 == main_~i~0); 560#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 558#L15-1 [2020-11-29 18:49:47,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,131 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2020-11-29 18:49:47,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:47,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672785323] [2020-11-29 18:49:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:47,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,144 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,150 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:47,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1678390, now seen corresponding path program 1 times [2020-11-29 18:49:47,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:47,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569287924] [2020-11-29 18:49:47,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:47,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,159 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,165 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,166 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:47,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,168 INFO L82 PathProgramCache]: Analyzing trace with hash 668197123, now seen corresponding path program 1 times [2020-11-29 18:49:47,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:47,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630724185] [2020-11-29 18:49:47,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:47,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630724185] [2020-11-29 18:49:47,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:49:47,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:49:47,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186802703] [2020-11-29 18:49:47,244 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:47,244 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:47,244 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:47,244 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:47,244 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:47,244 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:47,244 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:47,245 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:47,245 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration6_Loop [2020-11-29 18:49:47,245 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:47,245 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:47,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,254 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,258 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,348 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:47,348 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:47,361 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:47,361 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:47,404 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:47,404 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:47,475 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:47,476 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:47,476 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:47,476 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:47,477 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:47,477 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:47,477 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:47,477 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:47,477 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:47,477 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration6_Loop [2020-11-29 18:49:47,477 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:47,477 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:47,478 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,494 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,502 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,586 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:47,586 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:47,591 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:47,593 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:47,593 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:47,593 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:47,593 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:47,593 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:47,594 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:47,595 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:47,597 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:47,600 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:49:47,600 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:47,603 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:47,603 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:47,603 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:47,603 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:47,637 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:47,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:47,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:47,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:47,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:47,694 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 [2020-11-29 18:49:47,694 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 33 transitions. cyclomatic complexity: 12 Second operand 3 states. [2020-11-29 18:49:47,742 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 33 transitions. cyclomatic complexity: 12. Second operand 3 states. Result 51 states and 68 transitions. Complement of second has 7 states. [2020-11-29 18:49:47,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 18:49:47,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 21 transitions. [2020-11-29 18:49:47,754 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-29 18:49:47,762 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:47,762 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-29 18:49:47,762 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:47,762 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-29 18:49:47,762 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:47,763 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 68 transitions. [2020-11-29 18:49:47,764 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 19 [2020-11-29 18:49:47,764 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 49 states and 65 transitions. [2020-11-29 18:49:47,764 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2020-11-29 18:49:47,765 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2020-11-29 18:49:47,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 65 transitions. [2020-11-29 18:49:47,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:47,765 INFO L691 BuchiCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-11-29 18:49:47,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states and 65 transitions. [2020-11-29 18:49:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2020-11-29 18:49:47,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-29 18:49:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2020-11-29 18:49:47,774 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 60 transitions. [2020-11-29 18:49:47,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:47,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:49:47,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:49:47,775 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand 4 states. [2020-11-29 18:49:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:47,868 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2020-11-29 18:49:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:49:47,869 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 46 states and 59 transitions. [2020-11-29 18:49:47,870 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 18:49:47,871 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 46 states to 36 states and 47 transitions. [2020-11-29 18:49:47,871 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-11-29 18:49:47,871 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 18:49:47,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 47 transitions. [2020-11-29 18:49:47,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:47,871 INFO L691 BuchiCegarLoop]: Abstraction has 36 states and 47 transitions. [2020-11-29 18:49:47,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states and 47 transitions. [2020-11-29 18:49:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2020-11-29 18:49:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 18:49:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2020-11-29 18:49:47,874 INFO L714 BuchiCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-11-29 18:49:47,874 INFO L594 BuchiCegarLoop]: Abstraction has 24 states and 32 transitions. [2020-11-29 18:49:47,874 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 18:49:47,874 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 24 states and 32 transitions. [2020-11-29 18:49:47,874 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-11-29 18:49:47,874 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:47,874 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:47,875 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 18:49:47,875 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:47,875 INFO L794 eck$LassoCheckResult]: Stem: 761#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 762#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 774#L12 assume !(10 == main_~i~0); 770#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 758#L15-1 [2020-11-29 18:49:47,875 INFO L796 eck$LassoCheckResult]: Loop: 758#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 779#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 767#L12 assume !(10 == main_~i~0); 757#L12-2 assume !(0 == main_~i~0); 758#L15-1 [2020-11-29 18:49:47,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,876 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 2 times [2020-11-29 18:49:47,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:47,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370912024] [2020-11-29 18:49:47,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,885 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,887 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:47,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1678392, now seen corresponding path program 2 times [2020-11-29 18:49:47,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:47,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452009972] [2020-11-29 18:49:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,892 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,894 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,901 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:47,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:47,902 INFO L82 PathProgramCache]: Analyzing trace with hash 668197125, now seen corresponding path program 1 times [2020-11-29 18:49:47,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:47,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458558910] [2020-11-29 18:49:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,913 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:47,925 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:47,926 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:47,954 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:47,954 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:47,954 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:47,954 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:47,954 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:47,954 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:47,954 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:47,954 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:47,954 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration7_Loop [2020-11-29 18:49:47,954 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:47,954 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:47,955 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,967 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:47,979 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:48,061 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:48,061 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,064 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:48,064 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:48,067 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:48,067 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,088 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:48,088 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:48,091 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:48,091 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,119 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:48,119 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:48,122 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:48,122 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:48,143 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:48,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:48,289 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:48,292 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:48,292 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:48,292 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:48,292 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:48,292 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:48,292 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,292 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:48,292 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:48,292 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration7_Loop [2020-11-29 18:49:48,292 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:48,292 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:48,293 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:48,298 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:48,304 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:48,307 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:48,435 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:48,436 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:48,439 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:48,440 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:48,440 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:48,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:48,441 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:48,443 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:48,443 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,447 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:48,483 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:48,484 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:48,485 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:48,485 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:48,485 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:48,485 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:48,486 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:48,486 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,488 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:48,529 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:48,530 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:48,530 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:48,531 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:48,531 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:48,533 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:48,534 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,537 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:48,573 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:48,575 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:48,575 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:48,575 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:48,575 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:48,575 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:48,578 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:48,578 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,581 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:48,584 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:48,584 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:48,586 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:48,586 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:48,586 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:48,587 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 17 Supporting invariants [] Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:48,621 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:48,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:48,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:48,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:49:48,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:48,717 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2020-11-29 18:49:48,717 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 24 states and 32 transitions. cyclomatic complexity: 11 Second operand 5 states. [2020-11-29 18:49:48,802 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 24 states and 32 transitions. cyclomatic complexity: 11. Second operand 5 states. Result 48 states and 62 transitions. Complement of second has 9 states. [2020-11-29 18:49:48,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:48,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 18:49:48,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 20 transitions. [2020-11-29 18:49:48,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-29 18:49:48,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:48,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-29 18:49:48,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:48,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 20 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-29 18:49:48,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:48,805 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 48 states and 62 transitions. [2020-11-29 18:49:48,806 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2020-11-29 18:49:48,806 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 48 states to 46 states and 59 transitions. [2020-11-29 18:49:48,806 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2020-11-29 18:49:48,806 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2020-11-29 18:49:48,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 59 transitions. [2020-11-29 18:49:48,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:48,807 INFO L691 BuchiCegarLoop]: Abstraction has 46 states and 59 transitions. [2020-11-29 18:49:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states and 59 transitions. [2020-11-29 18:49:48,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 42. [2020-11-29 18:49:48,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 18:49:48,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-11-29 18:49:48,810 INFO L714 BuchiCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-11-29 18:49:48,810 INFO L594 BuchiCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-11-29 18:49:48,810 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 18:49:48,810 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 55 transitions. [2020-11-29 18:49:48,815 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2020-11-29 18:49:48,816 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:48,816 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:48,816 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-11-29 18:49:48,816 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 18:49:48,817 INFO L794 eck$LassoCheckResult]: Stem: 886#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 887#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 898#L12 assume !(10 == main_~i~0); 902#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 899#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 888#L18-1 [2020-11-29 18:49:48,817 INFO L796 eck$LassoCheckResult]: Loop: 888#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 889#L12 assume 10 == main_~i~0;main_~up~0 := 0; 892#L12-2 assume !(0 == main_~i~0); 895#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 896#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 922#L12 assume !(10 == main_~i~0); 917#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 905#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 888#L18-1 [2020-11-29 18:49:48,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:48,817 INFO L82 PathProgramCache]: Analyzing trace with hash 29865611, now seen corresponding path program 2 times [2020-11-29 18:49:48,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:48,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143368433] [2020-11-29 18:49:48,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:48,831 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:48,835 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:48,839 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:48,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 2014853141, now seen corresponding path program 1 times [2020-11-29 18:49:48,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:48,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774531500] [2020-11-29 18:49:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:48,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:48,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:48,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774531500] [2020-11-29 18:49:48,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040155694] [2020-11-29 18:49:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 18:49:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:48,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 18:49:48,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:48,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:48,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:48,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-29 18:49:48,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527768446] [2020-11-29 18:49:48,916 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:49:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:49:48,922 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. cyclomatic complexity: 18 Second operand 4 states. [2020-11-29 18:49:48,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:48,954 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-11-29 18:49:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:49:48,956 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 54 states and 67 transitions. [2020-11-29 18:49:48,957 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2020-11-29 18:49:48,957 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 54 states to 48 states and 61 transitions. [2020-11-29 18:49:48,957 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2020-11-29 18:49:48,957 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2020-11-29 18:49:48,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 61 transitions. [2020-11-29 18:49:48,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:48,958 INFO L691 BuchiCegarLoop]: Abstraction has 48 states and 61 transitions. [2020-11-29 18:49:48,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 61 transitions. [2020-11-29 18:49:48,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-11-29 18:49:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-29 18:49:48,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-11-29 18:49:48,970 INFO L714 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-11-29 18:49:48,970 INFO L594 BuchiCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-11-29 18:49:48,970 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 18:49:48,970 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 48 transitions. [2020-11-29 18:49:48,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2020-11-29 18:49:48,972 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:48,972 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:48,972 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-11-29 18:49:48,973 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:48,973 INFO L794 eck$LassoCheckResult]: Stem: 1010#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 1011#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1026#L12 assume !(10 == main_~i~0); 1023#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 1019#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1021#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1016#L12 assume 10 == main_~i~0;main_~up~0 := 0; 1006#L12-2 [2020-11-29 18:49:48,973 INFO L796 eck$LassoCheckResult]: Loop: 1006#L12-2 assume !(0 == main_~i~0); 1007#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 1012#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1013#L12 assume 10 == main_~i~0;main_~up~0 := 0; 1006#L12-2 [2020-11-29 18:49:48,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:48,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918578, now seen corresponding path program 1 times [2020-11-29 18:49:48,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:48,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827924568] [2020-11-29 18:49:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:49,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827924568] [2020-11-29 18:49:49,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 18:49:49,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 18:49:49,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610317815] [2020-11-29 18:49:49,005 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1575402, now seen corresponding path program 2 times [2020-11-29 18:49:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:49,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408691870] [2020-11-29 18:49:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:49,009 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:49,011 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:49,012 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:49,054 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:49,054 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:49,054 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:49,054 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:49,054 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:49,054 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,054 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:49,055 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:49,055 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration9_Loop [2020-11-29 18:49:49,055 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:49,055 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:49,056 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,065 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,149 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:49,149 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,160 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:49,160 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:49,163 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:49,163 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_11=1} Honda state: {v_rep~unnamed0~0~true_11=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,186 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:49,186 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:49,189 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:49,189 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_11=0} Honda state: {v_rep~unnamed0~0~false_11=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:49,210 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:49,212 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:49,212 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,233 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:49,233 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,267 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:49,268 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:49,366 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:49,367 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:49,367 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:49,367 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:49,367 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:49,367 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:49,367 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,367 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:49,368 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:49,368 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration9_Loop [2020-11-29 18:49:49,368 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:49,368 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:49,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,374 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,399 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,455 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:49,455 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,457 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:49,459 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:49,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:49,459 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:49,459 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:49,461 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:49,461 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:49,467 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,488 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:49,489 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:49,489 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:49,490 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:49,490 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:49,490 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:49,491 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:49,492 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:49,494 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,518 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:49,520 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:49,520 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:49,520 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:49,520 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:49,522 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:49,522 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:49,525 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,546 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:49,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:49,547 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:49,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:49,547 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:49,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:49,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:49,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:49,550 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:49,552 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 18:49:49,552 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,554 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:49,554 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:49,554 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:49,554 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-11-29 18:49:49,576 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:49,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:49,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:49,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:49,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:49,622 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 [2020-11-29 18:49:49,622 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 48 transitions. cyclomatic complexity: 15 Second operand 4 states. [2020-11-29 18:49:49,670 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 48 transitions. cyclomatic complexity: 15. Second operand 4 states. Result 86 states and 109 transitions. Complement of second has 7 states. [2020-11-29 18:49:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:49:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-11-29 18:49:49,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 18:49:49,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:49,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 11 letters. Loop has 4 letters. [2020-11-29 18:49:49,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:49,672 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 8 letters. [2020-11-29 18:49:49,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:49,672 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 86 states and 109 transitions. [2020-11-29 18:49:49,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2020-11-29 18:49:49,674 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 86 states to 67 states and 85 transitions. [2020-11-29 18:49:49,674 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2020-11-29 18:49:49,674 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 30 [2020-11-29 18:49:49,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 85 transitions. [2020-11-29 18:49:49,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:49,674 INFO L691 BuchiCegarLoop]: Abstraction has 67 states and 85 transitions. [2020-11-29 18:49:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states and 85 transitions. [2020-11-29 18:49:49,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2020-11-29 18:49:49,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-29 18:49:49,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2020-11-29 18:49:49,678 INFO L714 BuchiCegarLoop]: Abstraction has 60 states and 77 transitions. [2020-11-29 18:49:49,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:49,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 18:49:49,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 18:49:49,679 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand 4 states. [2020-11-29 18:49:49,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:49,701 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2020-11-29 18:49:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 18:49:49,702 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 79 states and 96 transitions. [2020-11-29 18:49:49,703 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 18 [2020-11-29 18:49:49,704 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 79 states to 75 states and 92 transitions. [2020-11-29 18:49:49,704 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 36 [2020-11-29 18:49:49,704 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2020-11-29 18:49:49,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 92 transitions. [2020-11-29 18:49:49,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:49,704 INFO L691 BuchiCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-11-29 18:49:49,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states and 92 transitions. [2020-11-29 18:49:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 63. [2020-11-29 18:49:49,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-29 18:49:49,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 78 transitions. [2020-11-29 18:49:49,708 INFO L714 BuchiCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-11-29 18:49:49,708 INFO L594 BuchiCegarLoop]: Abstraction has 63 states and 78 transitions. [2020-11-29 18:49:49,709 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 18:49:49,709 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 63 states and 78 transitions. [2020-11-29 18:49:49,709 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 18:49:49,709 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:49,709 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:49,710 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 3, 3, 2, 2, 2, 1, 1] [2020-11-29 18:49:49,710 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 18:49:49,710 INFO L794 eck$LassoCheckResult]: Stem: 1330#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 1331#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1355#L12 assume 10 == main_~i~0;main_~up~0 := 0; 1363#L12-2 assume !(0 == main_~i~0); 1362#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 1361#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1360#L12 assume !(10 == main_~i~0); 1354#L12-2 assume !(0 == main_~i~0); 1359#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 1358#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1353#L12 assume !(10 == main_~i~0); 1348#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 1349#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1334#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1335#L12 assume !(10 == main_~i~0); 1327#L12-2 assume !(0 == main_~i~0); 1329#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1384#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1344#L12 assume 10 == main_~i~0;main_~up~0 := 0; 1345#L12-2 [2020-11-29 18:49:49,711 INFO L796 eck$LassoCheckResult]: Loop: 1345#L12-2 assume !(0 == main_~i~0); 1376#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 1375#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1346#L12 assume 10 == main_~i~0;main_~up~0 := 0; 1345#L12-2 [2020-11-29 18:49:49,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash -976997301, now seen corresponding path program 1 times [2020-11-29 18:49:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:49,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828725657] [2020-11-29 18:49:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 18:49:49,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828725657] [2020-11-29 18:49:49,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247609274] [2020-11-29 18:49:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 18:49:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:49,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:49,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 23 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 18:49:49,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:49,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 18:49:49,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330135834] [2020-11-29 18:49:49,796 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:49,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:49,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1575402, now seen corresponding path program 3 times [2020-11-29 18:49:49,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:49,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160537092] [2020-11-29 18:49:49,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:49,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:49,800 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:49,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:49,802 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:49,846 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:49,846 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:49,847 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:49,847 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:49,847 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:49,847 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,847 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:49,847 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:49,847 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration10_Loop [2020-11-29 18:49:49,847 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:49,847 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:49,848 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,858 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:49,931 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:49,931 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:49,936 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:49,936 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:49,939 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:49,939 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:49,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:49,960 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:49,983 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:49,983 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:50,083 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:50,084 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:50,084 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:50,085 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:50,085 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:50,085 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:50,085 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:50,085 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:50,085 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:50,085 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration10_Loop [2020-11-29 18:49:50,085 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:50,085 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:50,086 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:50,091 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:50,096 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:50,098 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:50,190 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:50,191 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:50,196 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:50,197 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:50,197 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:50,197 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:50,197 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:50,197 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:50,202 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:50,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:50,204 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:50,224 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:50,225 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:50,225 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:50,226 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:50,226 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:50,226 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:50,226 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:50,227 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:50,228 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:50,230 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:50,230 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_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:50,233 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:50,233 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:50,233 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:50,233 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:50,267 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:50,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,346 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 [2020-11-29 18:49:50,347 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 78 transitions. cyclomatic complexity: 22 Second operand 4 states. [2020-11-29 18:49:50,393 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 78 transitions. cyclomatic complexity: 22. Second operand 4 states. Result 89 states and 110 transitions. Complement of second has 7 states. [2020-11-29 18:49:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:50,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:49:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-11-29 18:49:50,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 19 letters. Loop has 4 letters. [2020-11-29 18:49:50,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:50,395 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:49:50,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,442 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 [2020-11-29 18:49:50,443 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 78 transitions. cyclomatic complexity: 22 Second operand 4 states. [2020-11-29 18:49:50,494 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 78 transitions. cyclomatic complexity: 22. Second operand 4 states. Result 108 states and 129 transitions. Complement of second has 7 states. [2020-11-29 18:49:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:49:50,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 20 transitions. [2020-11-29 18:49:50,495 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 20 transitions. Stem has 19 letters. Loop has 4 letters. [2020-11-29 18:49:50,495 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:50,495 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 18:49:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,542 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 [2020-11-29 18:49:50,542 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 63 states and 78 transitions. cyclomatic complexity: 22 Second operand 4 states. [2020-11-29 18:49:50,568 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 63 states and 78 transitions. cyclomatic complexity: 22. Second operand 4 states. Result 97 states and 122 transitions. Complement of second has 8 states. [2020-11-29 18:49:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:50,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 18:49:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2020-11-29 18:49:50,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 19 letters. Loop has 4 letters. [2020-11-29 18:49:50,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:50,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 23 letters. Loop has 4 letters. [2020-11-29 18:49:50,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:50,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 19 letters. Loop has 8 letters. [2020-11-29 18:49:50,572 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:50,572 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 122 transitions. [2020-11-29 18:49:50,573 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 18 [2020-11-29 18:49:50,574 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 70 states and 86 transitions. [2020-11-29 18:49:50,574 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2020-11-29 18:49:50,574 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 18:49:50,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 86 transitions. [2020-11-29 18:49:50,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:50,574 INFO L691 BuchiCegarLoop]: Abstraction has 70 states and 86 transitions. [2020-11-29 18:49:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states and 86 transitions. [2020-11-29 18:49:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 41. [2020-11-29 18:49:50,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-29 18:49:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2020-11-29 18:49:50,577 INFO L714 BuchiCegarLoop]: Abstraction has 41 states and 51 transitions. [2020-11-29 18:49:50,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:50,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:49:50,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:49:50,578 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand 5 states. [2020-11-29 18:49:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:50,607 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2020-11-29 18:49:50,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:49:50,607 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 62 states and 75 transitions. [2020-11-29 18:49:50,608 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2020-11-29 18:49:50,609 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 62 states to 60 states and 73 transitions. [2020-11-29 18:49:50,609 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 18 [2020-11-29 18:49:50,609 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-11-29 18:49:50,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 73 transitions. [2020-11-29 18:49:50,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:50,609 INFO L691 BuchiCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-11-29 18:49:50,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states and 73 transitions. [2020-11-29 18:49:50,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2020-11-29 18:49:50,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-29 18:49:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 60 transitions. [2020-11-29 18:49:50,612 INFO L714 BuchiCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-11-29 18:49:50,612 INFO L594 BuchiCegarLoop]: Abstraction has 49 states and 60 transitions. [2020-11-29 18:49:50,612 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 18:49:50,612 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 49 states and 60 transitions. [2020-11-29 18:49:50,613 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-29 18:49:50,613 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:50,613 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:50,614 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 1, 1, 1, 1] [2020-11-29 18:49:50,614 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 4, 3, 2, 1, 1] [2020-11-29 18:49:50,614 INFO L794 eck$LassoCheckResult]: Stem: 2094#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2095#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2110#L12 assume !(10 == main_~i~0); 2107#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2104#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2105#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2129#L12 assume !(10 == main_~i~0); 2122#L12-2 assume !(0 == main_~i~0); 2124#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2134#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2100#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2090#L12-2 [2020-11-29 18:49:50,614 INFO L796 eck$LassoCheckResult]: Loop: 2090#L12-2 assume !(0 == main_~i~0); 2091#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2136#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2101#L12 assume !(10 == main_~i~0); 2103#L12-2 assume !(0 == main_~i~0); 2138#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2137#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2135#L12 assume !(10 == main_~i~0); 2128#L12-2 assume !(0 == main_~i~0); 2131#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2130#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2127#L12 assume !(10 == main_~i~0); 2121#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2106#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2096#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2097#L12 assume !(10 == main_~i~0); 2125#L12-2 assume !(0 == main_~i~0); 2126#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2133#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2132#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2090#L12-2 [2020-11-29 18:49:50,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,615 INFO L82 PathProgramCache]: Analyzing trace with hash -912841737, now seen corresponding path program 1 times [2020-11-29 18:49:50,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:50,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013638292] [2020-11-29 18:49:50,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013638292] [2020-11-29 18:49:50,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241460264] [2020-11-29 18:49:50,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:50,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-29 18:49:50,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621589659] [2020-11-29 18:49:50,676 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:50,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1872990932, now seen corresponding path program 2 times [2020-11-29 18:49:50,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:50,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080244282] [2020-11-29 18:49:50,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:50,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080244282] [2020-11-29 18:49:50,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983666681] [2020-11-29 18:49:50,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:50,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:49:50,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:50,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 22 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:50,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:50,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2020-11-29 18:49:50,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228314034] [2020-11-29 18:49:50,740 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:50,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:50,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 18:49:50,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 18:49:50,741 INFO L87 Difference]: Start difference. First operand 49 states and 60 transitions. cyclomatic complexity: 15 Second operand 5 states. [2020-11-29 18:49:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:50,764 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-11-29 18:49:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 18:49:50,765 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 67 states and 79 transitions. [2020-11-29 18:49:50,766 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2020-11-29 18:49:50,766 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 67 states to 64 states and 76 transitions. [2020-11-29 18:49:50,766 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-11-29 18:49:50,766 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 18:49:50,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 76 transitions. [2020-11-29 18:49:50,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:50,767 INFO L691 BuchiCegarLoop]: Abstraction has 64 states and 76 transitions. [2020-11-29 18:49:50,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states and 76 transitions. [2020-11-29 18:49:50,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-11-29 18:49:50,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 18:49:50,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2020-11-29 18:49:50,770 INFO L714 BuchiCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-11-29 18:49:50,770 INFO L594 BuchiCegarLoop]: Abstraction has 56 states and 67 transitions. [2020-11-29 18:49:50,770 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-29 18:49:50,770 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 67 transitions. [2020-11-29 18:49:50,771 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2020-11-29 18:49:50,771 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:50,771 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:50,772 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 1, 1, 1] [2020-11-29 18:49:50,772 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 3, 3, 1, 1] [2020-11-29 18:49:50,772 INFO L794 eck$LassoCheckResult]: Stem: 2308#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2309#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2334#L12 assume !(10 == main_~i~0); 2328#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2316#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2312#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2313#L12 assume !(10 == main_~i~0); 2306#L12-2 assume !(0 == main_~i~0); 2307#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2317#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2359#L12 assume !(10 == main_~i~0); 2358#L12-2 assume !(0 == main_~i~0); 2331#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2329#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2320#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2321#L12-2 [2020-11-29 18:49:50,772 INFO L796 eck$LassoCheckResult]: Loop: 2321#L12-2 assume !(0 == main_~i~0); 2352#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2350#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2348#L12 assume !(10 == main_~i~0); 2347#L12-2 assume !(0 == main_~i~0); 2346#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2344#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2343#L12 assume !(10 == main_~i~0); 2325#L12-2 assume !(0 == main_~i~0); 2340#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2338#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2323#L12 assume !(10 == main_~i~0); 2326#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2356#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2310#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2311#L12 assume !(10 == main_~i~0); 2357#L12-2 assume !(0 == main_~i~0); 2318#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2319#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2322#L12 assume !(10 == main_~i~0); 2304#L12-2 assume !(0 == main_~i~0); 2305#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2330#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2327#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2321#L12-2 [2020-11-29 18:49:50,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,773 INFO L82 PathProgramCache]: Analyzing trace with hash 554461792, now seen corresponding path program 2 times [2020-11-29 18:49:50,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:50,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58985834] [2020-11-29 18:49:50,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58985834] [2020-11-29 18:49:50,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372886392] [2020-11-29 18:49:50,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:50,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:49:50,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:50,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,843 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:50,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:50,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 18:49:50,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848648436] [2020-11-29 18:49:50,843 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash -77847875, now seen corresponding path program 3 times [2020-11-29 18:49:50,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:50,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079323196] [2020-11-29 18:49:50,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:50,885 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:50,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079323196] [2020-11-29 18:49:50,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6524061] [2020-11-29 18:49:50,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:50,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-29 18:49:50,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:50,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:49:50,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:50,914 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:50,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 18:49:50,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697465882] [2020-11-29 18:49:50,915 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:50,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:50,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:49:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:49:50,916 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. cyclomatic complexity: 15 Second operand 6 states. [2020-11-29 18:49:50,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:50,959 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2020-11-29 18:49:50,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:49:50,960 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 75 states and 87 transitions. [2020-11-29 18:49:50,961 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 31 [2020-11-29 18:49:50,962 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 75 states to 72 states and 84 transitions. [2020-11-29 18:49:50,962 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2020-11-29 18:49:50,962 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2020-11-29 18:49:50,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 84 transitions. [2020-11-29 18:49:50,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:50,962 INFO L691 BuchiCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-11-29 18:49:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states and 84 transitions. [2020-11-29 18:49:50,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2020-11-29 18:49:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 18:49:50,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2020-11-29 18:49:50,964 INFO L714 BuchiCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-11-29 18:49:50,965 INFO L594 BuchiCegarLoop]: Abstraction has 64 states and 75 transitions. [2020-11-29 18:49:50,965 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-29 18:49:50,965 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 64 states and 75 transitions. [2020-11-29 18:49:50,965 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2020-11-29 18:49:50,965 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:50,965 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:50,966 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 3, 1, 1, 1] [2020-11-29 18:49:50,966 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 6, 6, 4, 3, 1, 1] [2020-11-29 18:49:50,967 INFO L794 eck$LassoCheckResult]: Stem: 2563#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2564#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2593#L12 assume !(10 == main_~i~0); 2584#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2572#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2567#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2568#L12 assume !(10 == main_~i~0); 2571#L12-2 assume !(0 == main_~i~0); 2573#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2574#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2622#L12 assume !(10 == main_~i~0); 2561#L12-2 assume !(0 == main_~i~0); 2562#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2619#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2614#L12 assume !(10 == main_~i~0); 2613#L12-2 assume !(0 == main_~i~0); 2587#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2585#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2575#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2576#L12-2 [2020-11-29 18:49:50,967 INFO L796 eck$LassoCheckResult]: Loop: 2576#L12-2 assume !(0 == main_~i~0); 2609#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2607#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2605#L12 assume !(10 == main_~i~0); 2604#L12-2 assume !(0 == main_~i~0); 2603#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2601#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2600#L12 assume !(10 == main_~i~0); 2580#L12-2 assume !(0 == main_~i~0); 2597#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2595#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2578#L12 assume !(10 == main_~i~0); 2581#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2621#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2620#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2577#L12 assume !(10 == main_~i~0); 2559#L12-2 assume !(0 == main_~i~0); 2560#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2565#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2566#L12 assume !(10 == main_~i~0); 2618#L12-2 assume !(0 == main_~i~0); 2617#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2616#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2615#L12 assume !(10 == main_~i~0); 2583#L12-2 assume !(0 == main_~i~0); 2588#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2586#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2582#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2576#L12-2 [2020-11-29 18:49:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:50,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1774824375, now seen corresponding path program 3 times [2020-11-29 18:49:50,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:50,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661064303] [2020-11-29 18:49:50,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:51,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661064303] [2020-11-29 18:49:51,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442378286] [2020-11-29 18:49:51,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:51,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 18:49:51,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:49:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:51,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:51,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:51,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 18:49:51,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654703422] [2020-11-29 18:49:51,072 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:51,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:51,073 INFO L82 PathProgramCache]: Analyzing trace with hash -687303130, now seen corresponding path program 4 times [2020-11-29 18:49:51,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:51,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512979039] [2020-11-29 18:49:51,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512979039] [2020-11-29 18:49:51,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279197312] [2020-11-29 18:49:51,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:51,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:49:51,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:51,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:49:51,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 48 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:51,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:51,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 18:49:51,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518008905] [2020-11-29 18:49:51,172 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:51,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:51,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:49:51,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:49:51,172 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. cyclomatic complexity: 15 Second operand 7 states. [2020-11-29 18:49:51,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:51,236 INFO L93 Difference]: Finished difference Result 83 states and 95 transitions. [2020-11-29 18:49:51,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:49:51,237 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 83 states and 95 transitions. [2020-11-29 18:49:51,237 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 35 [2020-11-29 18:49:51,238 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 83 states to 80 states and 92 transitions. [2020-11-29 18:49:51,238 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-11-29 18:49:51,238 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-11-29 18:49:51,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 92 transitions. [2020-11-29 18:49:51,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:51,239 INFO L691 BuchiCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-11-29 18:49:51,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states and 92 transitions. [2020-11-29 18:49:51,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-11-29 18:49:51,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 18:49:51,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 83 transitions. [2020-11-29 18:49:51,241 INFO L714 BuchiCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-11-29 18:49:51,242 INFO L594 BuchiCegarLoop]: Abstraction has 72 states and 83 transitions. [2020-11-29 18:49:51,242 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-11-29 18:49:51,242 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 72 states and 83 transitions. [2020-11-29 18:49:51,242 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 33 [2020-11-29 18:49:51,242 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:51,243 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:51,244 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 1, 1, 1] [2020-11-29 18:49:51,244 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 7, 5, 3, 1, 1] [2020-11-29 18:49:51,244 INFO L794 eck$LassoCheckResult]: Stem: 2860#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2861#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2890#L12 assume !(10 == main_~i~0); 2881#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2868#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2869#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2927#L12 assume !(10 == main_~i~0); 2926#L12-2 assume !(0 == main_~i~0); 2870#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2864#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2865#L12 assume !(10 == main_~i~0); 2858#L12-2 assume !(0 == main_~i~0); 2859#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2925#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2924#L12 assume !(10 == main_~i~0); 2923#L12-2 assume !(0 == main_~i~0); 2911#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2921#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2912#L12 assume !(10 == main_~i~0); 2910#L12-2 assume !(0 == main_~i~0); 2884#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2882#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2872#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2873#L12-2 [2020-11-29 18:49:51,244 INFO L796 eck$LassoCheckResult]: Loop: 2873#L12-2 assume !(0 == main_~i~0); 2906#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2904#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2902#L12 assume !(10 == main_~i~0); 2901#L12-2 assume !(0 == main_~i~0); 2900#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2898#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2897#L12 assume !(10 == main_~i~0); 2878#L12-2 assume !(0 == main_~i~0); 2894#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 2892#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2876#L12 assume !(10 == main_~i~0); 2856#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 2857#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2922#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2874#L12 assume !(10 == main_~i~0); 2875#L12-2 assume !(0 == main_~i~0); 2871#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2862#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2863#L12 assume !(10 == main_~i~0); 2920#L12-2 assume !(0 == main_~i~0); 2919#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2918#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2917#L12 assume !(10 == main_~i~0); 2916#L12-2 assume !(0 == main_~i~0); 2915#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2914#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2913#L12 assume !(10 == main_~i~0); 2880#L12-2 assume !(0 == main_~i~0); 2885#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2883#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2879#L12 assume 10 == main_~i~0;main_~up~0 := 0; 2873#L12-2 [2020-11-29 18:49:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash 790045106, now seen corresponding path program 4 times [2020-11-29 18:49:51,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:51,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365494143] [2020-11-29 18:49:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:51,311 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365494143] [2020-11-29 18:49:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311823395] [2020-11-29 18:49:51,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 18:49:51,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:49:51,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:51,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:49:51,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:51,360 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:51,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:51,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 18:49:51,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578193463] [2020-11-29 18:49:51,360 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:51,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:51,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1460350223, now seen corresponding path program 5 times [2020-11-29 18:49:51,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:51,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182317137] [2020-11-29 18:49:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 61 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182317137] [2020-11-29 18:49:51,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44183422] [2020-11-29 18:49:51,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 18:49:51,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-29 18:49:51,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:51,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:49:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 61 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:51,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:51,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 18:49:51,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011532666] [2020-11-29 18:49:51,484 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:51,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:51,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:49:51,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:49:51,485 INFO L87 Difference]: Start difference. First operand 72 states and 83 transitions. cyclomatic complexity: 15 Second operand 8 states. [2020-11-29 18:49:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:51,568 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2020-11-29 18:49:51,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:49:51,568 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 103 transitions. [2020-11-29 18:49:51,569 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 39 [2020-11-29 18:49:51,570 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 88 states and 100 transitions. [2020-11-29 18:49:51,570 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-11-29 18:49:51,570 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2020-11-29 18:49:51,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 100 transitions. [2020-11-29 18:49:51,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:51,570 INFO L691 BuchiCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-11-29 18:49:51,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states and 100 transitions. [2020-11-29 18:49:51,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-11-29 18:49:51,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-29 18:49:51,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2020-11-29 18:49:51,573 INFO L714 BuchiCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-11-29 18:49:51,573 INFO L594 BuchiCegarLoop]: Abstraction has 80 states and 91 transitions. [2020-11-29 18:49:51,573 INFO L427 BuchiCegarLoop]: ======== Iteration 15============ [2020-11-29 18:49:51,573 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 80 states and 91 transitions. [2020-11-29 18:49:51,574 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 37 [2020-11-29 18:49:51,574 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:51,574 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:51,575 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 6, 5, 1, 1, 1] [2020-11-29 18:49:51,575 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 8, 8, 6, 3, 1, 1] [2020-11-29 18:49:51,575 INFO L794 eck$LassoCheckResult]: Stem: 3199#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3200#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3227#L12 assume !(10 == main_~i~0); 3218#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 3207#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3203#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3204#L12 assume !(10 == main_~i~0); 3197#L12-2 assume !(0 == main_~i~0); 3198#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3208#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3274#L12 assume !(10 == main_~i~0); 3273#L12-2 assume !(0 == main_~i~0); 3272#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3271#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3270#L12 assume !(10 == main_~i~0); 3269#L12-2 assume !(0 == main_~i~0); 3268#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3267#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3266#L12 assume !(10 == main_~i~0); 3265#L12-2 assume !(0 == main_~i~0); 3248#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3262#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3249#L12 assume !(10 == main_~i~0); 3247#L12-2 assume !(0 == main_~i~0); 3221#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3219#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3209#L12 assume 10 == main_~i~0;main_~up~0 := 0; 3210#L12-2 [2020-11-29 18:49:51,575 INFO L796 eck$LassoCheckResult]: Loop: 3210#L12-2 assume !(0 == main_~i~0); 3243#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 3241#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3239#L12 assume !(10 == main_~i~0); 3238#L12-2 assume !(0 == main_~i~0); 3237#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 3236#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3234#L12 assume !(10 == main_~i~0); 3214#L12-2 assume !(0 == main_~i~0); 3231#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 3229#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3211#L12 assume !(10 == main_~i~0); 3213#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 3264#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3263#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3215#L12 assume !(10 == main_~i~0); 3195#L12-2 assume !(0 == main_~i~0); 3196#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3201#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3202#L12 assume !(10 == main_~i~0); 3261#L12-2 assume !(0 == main_~i~0); 3260#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3259#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3258#L12 assume !(10 == main_~i~0); 3257#L12-2 assume !(0 == main_~i~0); 3256#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3255#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3254#L12 assume !(10 == main_~i~0); 3253#L12-2 assume !(0 == main_~i~0); 3252#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3251#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3250#L12 assume !(10 == main_~i~0); 3217#L12-2 assume !(0 == main_~i~0); 3222#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3220#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3216#L12 assume 10 == main_~i~0;main_~up~0 := 0; 3210#L12-2 [2020-11-29 18:49:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:51,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1500441957, now seen corresponding path program 5 times [2020-11-29 18:49:51,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:51,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784000585] [2020-11-29 18:49:51,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784000585] [2020-11-29 18:49:51,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606323973] [2020-11-29 18:49:51,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 18:49:51,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 18:49:51,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:51,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:49:51,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:51,745 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:51,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:51,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 18:49:51,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974853271] [2020-11-29 18:49:51,746 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:51,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:51,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1420175224, now seen corresponding path program 6 times [2020-11-29 18:49:51,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:51,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893214965] [2020-11-29 18:49:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 74 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:51,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893214965] [2020-11-29 18:49:51,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508237951] [2020-11-29 18:49:51,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:51,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 18:49:51,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:51,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:49:51,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 74 proven. 55 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:51,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:51,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 18:49:51,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483031887] [2020-11-29 18:49:51,845 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:51,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:51,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:49:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:49:51,846 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. cyclomatic complexity: 15 Second operand 9 states. [2020-11-29 18:49:51,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:51,929 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2020-11-29 18:49:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:49:51,930 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 99 states and 111 transitions. [2020-11-29 18:49:51,931 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 43 [2020-11-29 18:49:51,931 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 99 states to 96 states and 108 transitions. [2020-11-29 18:49:51,931 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2020-11-29 18:49:51,932 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2020-11-29 18:49:51,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 108 transitions. [2020-11-29 18:49:51,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:51,932 INFO L691 BuchiCegarLoop]: Abstraction has 96 states and 108 transitions. [2020-11-29 18:49:51,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states and 108 transitions. [2020-11-29 18:49:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2020-11-29 18:49:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-29 18:49:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2020-11-29 18:49:51,934 INFO L714 BuchiCegarLoop]: Abstraction has 88 states and 99 transitions. [2020-11-29 18:49:51,934 INFO L594 BuchiCegarLoop]: Abstraction has 88 states and 99 transitions. [2020-11-29 18:49:51,934 INFO L427 BuchiCegarLoop]: ======== Iteration 16============ [2020-11-29 18:49:51,934 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 88 states and 99 transitions. [2020-11-29 18:49:51,935 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 41 [2020-11-29 18:49:51,935 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:51,935 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:51,936 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 7, 6, 1, 1, 1] [2020-11-29 18:49:51,936 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 9, 7, 3, 1, 1] [2020-11-29 18:49:51,937 INFO L794 eck$LassoCheckResult]: Stem: 3580#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3581#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3609#L12 assume !(10 == main_~i~0); 3600#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 3588#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3584#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3585#L12 assume !(10 == main_~i~0); 3578#L12-2 assume !(0 == main_~i~0); 3579#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3589#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3663#L12 assume !(10 == main_~i~0); 3662#L12-2 assume !(0 == main_~i~0); 3661#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3660#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3659#L12 assume !(10 == main_~i~0); 3658#L12-2 assume !(0 == main_~i~0); 3657#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3656#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3655#L12 assume !(10 == main_~i~0); 3654#L12-2 assume !(0 == main_~i~0); 3653#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3652#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3651#L12 assume !(10 == main_~i~0); 3650#L12-2 assume !(0 == main_~i~0); 3630#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3649#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3631#L12 assume !(10 == main_~i~0); 3629#L12-2 assume !(0 == main_~i~0); 3603#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3601#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3591#L12 assume 10 == main_~i~0;main_~up~0 := 0; 3592#L12-2 [2020-11-29 18:49:51,937 INFO L796 eck$LassoCheckResult]: Loop: 3592#L12-2 assume !(0 == main_~i~0); 3625#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 3623#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3621#L12 assume !(10 == main_~i~0); 3620#L12-2 assume !(0 == main_~i~0); 3619#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 3617#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3616#L12 assume !(10 == main_~i~0); 3599#L12-2 assume !(0 == main_~i~0); 3613#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 3611#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3597#L12 assume !(10 == main_~i~0); 3576#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 3577#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3648#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3593#L12 assume !(10 == main_~i~0); 3594#L12-2 assume !(0 == main_~i~0); 3590#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3582#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3583#L12 assume !(10 == main_~i~0); 3647#L12-2 assume !(0 == main_~i~0); 3646#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3645#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3644#L12 assume !(10 == main_~i~0); 3643#L12-2 assume !(0 == main_~i~0); 3642#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3641#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3640#L12 assume !(10 == main_~i~0); 3639#L12-2 assume !(0 == main_~i~0); 3638#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3637#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3636#L12 assume !(10 == main_~i~0); 3635#L12-2 assume !(0 == main_~i~0); 3634#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3633#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3632#L12 assume !(10 == main_~i~0); 3596#L12-2 assume !(0 == main_~i~0); 3604#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3602#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3595#L12 assume 10 == main_~i~0;main_~up~0 := 0; 3592#L12-2 [2020-11-29 18:49:51,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:51,937 INFO L82 PathProgramCache]: Analyzing trace with hash -60397820, now seen corresponding path program 6 times [2020-11-29 18:49:51,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:51,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318635954] [2020-11-29 18:49:51,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:51,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:52,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318635954] [2020-11-29 18:49:52,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354265589] [2020-11-29 18:49:52,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:52,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-29 18:49:52,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:52,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:49:52,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:52,062 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:52,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:52,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 18:49:52,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567780375] [2020-11-29 18:49:52,072 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:52,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1107573407, now seen corresponding path program 7 times [2020-11-29 18:49:52,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:52,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509363261] [2020-11-29 18:49:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:52,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 87 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:52,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509363261] [2020-11-29 18:49:52,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175916147] [2020-11-29 18:49:52,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:49:52,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 87 proven. 78 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:52,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:52,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 18:49:52,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983478962] [2020-11-29 18:49:52,242 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:52,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:49:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:49:52,245 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. cyclomatic complexity: 15 Second operand 10 states. [2020-11-29 18:49:52,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:52,321 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-11-29 18:49:52,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:49:52,322 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 107 states and 119 transitions. [2020-11-29 18:49:52,323 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 47 [2020-11-29 18:49:52,324 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 107 states to 104 states and 116 transitions. [2020-11-29 18:49:52,324 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2020-11-29 18:49:52,324 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2020-11-29 18:49:52,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 116 transitions. [2020-11-29 18:49:52,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:52,324 INFO L691 BuchiCegarLoop]: Abstraction has 104 states and 116 transitions. [2020-11-29 18:49:52,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states and 116 transitions. [2020-11-29 18:49:52,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 96. [2020-11-29 18:49:52,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-29 18:49:52,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 107 transitions. [2020-11-29 18:49:52,327 INFO L714 BuchiCegarLoop]: Abstraction has 96 states and 107 transitions. [2020-11-29 18:49:52,327 INFO L594 BuchiCegarLoop]: Abstraction has 96 states and 107 transitions. [2020-11-29 18:49:52,327 INFO L427 BuchiCegarLoop]: ======== Iteration 17============ [2020-11-29 18:49:52,327 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 96 states and 107 transitions. [2020-11-29 18:49:52,328 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 45 [2020-11-29 18:49:52,328 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:52,328 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:52,329 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 8, 7, 1, 1, 1] [2020-11-29 18:49:52,329 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [11, 10, 10, 8, 3, 1, 1] [2020-11-29 18:49:52,330 INFO L794 eck$LassoCheckResult]: Stem: 4003#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4004#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4032#L12 assume !(10 == main_~i~0); 4023#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 4011#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4007#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4008#L12 assume !(10 == main_~i~0); 4001#L12-2 assume !(0 == main_~i~0); 4002#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4012#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4094#L12 assume !(10 == main_~i~0); 4093#L12-2 assume !(0 == main_~i~0); 4092#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4091#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4090#L12 assume !(10 == main_~i~0); 4089#L12-2 assume !(0 == main_~i~0); 4088#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4087#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4086#L12 assume !(10 == main_~i~0); 4085#L12-2 assume !(0 == main_~i~0); 4084#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4083#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4082#L12 assume !(10 == main_~i~0); 4081#L12-2 assume !(0 == main_~i~0); 4080#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4079#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4078#L12 assume !(10 == main_~i~0); 4077#L12-2 assume !(0 == main_~i~0); 4053#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4076#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4054#L12 assume !(10 == main_~i~0); 4052#L12-2 assume !(0 == main_~i~0); 4026#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4024#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4014#L12 assume 10 == main_~i~0;main_~up~0 := 0; 4015#L12-2 [2020-11-29 18:49:52,330 INFO L796 eck$LassoCheckResult]: Loop: 4015#L12-2 assume !(0 == main_~i~0); 4048#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 4046#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4044#L12 assume !(10 == main_~i~0); 4043#L12-2 assume !(0 == main_~i~0); 4042#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 4040#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4039#L12 assume !(10 == main_~i~0); 4020#L12-2 assume !(0 == main_~i~0); 4036#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 4034#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4018#L12 assume !(10 == main_~i~0); 3999#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 4000#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4075#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4016#L12 assume !(10 == main_~i~0); 4017#L12-2 assume !(0 == main_~i~0); 4013#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4005#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4006#L12 assume !(10 == main_~i~0); 4074#L12-2 assume !(0 == main_~i~0); 4073#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4072#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4071#L12 assume !(10 == main_~i~0); 4070#L12-2 assume !(0 == main_~i~0); 4069#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4068#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4067#L12 assume !(10 == main_~i~0); 4066#L12-2 assume !(0 == main_~i~0); 4065#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4064#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4063#L12 assume !(10 == main_~i~0); 4062#L12-2 assume !(0 == main_~i~0); 4061#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4060#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4059#L12 assume !(10 == main_~i~0); 4058#L12-2 assume !(0 == main_~i~0); 4057#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4056#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4055#L12 assume !(10 == main_~i~0); 4022#L12-2 assume !(0 == main_~i~0); 4027#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4025#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4021#L12 assume 10 == main_~i~0;main_~up~0 := 0; 4015#L12-2 [2020-11-29 18:49:52,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:52,330 INFO L82 PathProgramCache]: Analyzing trace with hash 87645933, now seen corresponding path program 7 times [2020-11-29 18:49:52,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:52,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88933613] [2020-11-29 18:49:52,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:52,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88933613] [2020-11-29 18:49:52,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177365606] [2020-11-29 18:49:52,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:49:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 23 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:52,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:52,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 18:49:52,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406355334] [2020-11-29 18:49:52,480 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:52,480 INFO L82 PathProgramCache]: Analyzing trace with hash 638469834, now seen corresponding path program 8 times [2020-11-29 18:49:52,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:52,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290379748] [2020-11-29 18:49:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,592 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 100 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290379748] [2020-11-29 18:49:52,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762295499] [2020-11-29 18:49:52,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:52,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:49:52,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:49:52,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 100 proven. 105 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:52,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:52,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 18:49:52,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427638066] [2020-11-29 18:49:52,649 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:52,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:52,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:49:52,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:49:52,650 INFO L87 Difference]: Start difference. First operand 96 states and 107 transitions. cyclomatic complexity: 15 Second operand 11 states. [2020-11-29 18:49:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:52,761 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2020-11-29 18:49:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:49:52,762 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 115 states and 127 transitions. [2020-11-29 18:49:52,763 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 51 [2020-11-29 18:49:52,764 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 115 states to 112 states and 124 transitions. [2020-11-29 18:49:52,764 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2020-11-29 18:49:52,764 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-11-29 18:49:52,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 112 states and 124 transitions. [2020-11-29 18:49:52,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:52,764 INFO L691 BuchiCegarLoop]: Abstraction has 112 states and 124 transitions. [2020-11-29 18:49:52,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states and 124 transitions. [2020-11-29 18:49:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104. [2020-11-29 18:49:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-11-29 18:49:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2020-11-29 18:49:52,767 INFO L714 BuchiCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-11-29 18:49:52,767 INFO L594 BuchiCegarLoop]: Abstraction has 104 states and 115 transitions. [2020-11-29 18:49:52,767 INFO L427 BuchiCegarLoop]: ======== Iteration 18============ [2020-11-29 18:49:52,767 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 104 states and 115 transitions. [2020-11-29 18:49:52,768 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 49 [2020-11-29 18:49:52,768 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:52,768 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:52,769 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 9, 8, 1, 1, 1] [2020-11-29 18:49:52,769 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [12, 11, 11, 9, 3, 1, 1] [2020-11-29 18:49:52,770 INFO L794 eck$LassoCheckResult]: Stem: 4468#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4469#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4497#L12 assume !(10 == main_~i~0); 4488#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 4476#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4472#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4473#L12 assume !(10 == main_~i~0); 4466#L12-2 assume !(0 == main_~i~0); 4467#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4477#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4567#L12 assume !(10 == main_~i~0); 4566#L12-2 assume !(0 == main_~i~0); 4565#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4564#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4563#L12 assume !(10 == main_~i~0); 4562#L12-2 assume !(0 == main_~i~0); 4561#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4560#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4559#L12 assume !(10 == main_~i~0); 4558#L12-2 assume !(0 == main_~i~0); 4557#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4556#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4555#L12 assume !(10 == main_~i~0); 4554#L12-2 assume !(0 == main_~i~0); 4553#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4552#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4551#L12 assume !(10 == main_~i~0); 4550#L12-2 assume !(0 == main_~i~0); 4549#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4548#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4547#L12 assume !(10 == main_~i~0); 4546#L12-2 assume !(0 == main_~i~0); 4518#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4545#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4519#L12 assume !(10 == main_~i~0); 4517#L12-2 assume !(0 == main_~i~0); 4491#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4489#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4479#L12 assume 10 == main_~i~0;main_~up~0 := 0; 4480#L12-2 [2020-11-29 18:49:52,770 INFO L796 eck$LassoCheckResult]: Loop: 4480#L12-2 assume !(0 == main_~i~0); 4513#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 4511#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4509#L12 assume !(10 == main_~i~0); 4508#L12-2 assume !(0 == main_~i~0); 4507#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 4505#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4504#L12 assume !(10 == main_~i~0); 4485#L12-2 assume !(0 == main_~i~0); 4501#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 4499#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4483#L12 assume !(10 == main_~i~0); 4464#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 4465#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4544#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4481#L12 assume !(10 == main_~i~0); 4482#L12-2 assume !(0 == main_~i~0); 4478#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4470#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4471#L12 assume !(10 == main_~i~0); 4543#L12-2 assume !(0 == main_~i~0); 4542#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4541#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4540#L12 assume !(10 == main_~i~0); 4539#L12-2 assume !(0 == main_~i~0); 4538#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4537#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4536#L12 assume !(10 == main_~i~0); 4535#L12-2 assume !(0 == main_~i~0); 4534#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4533#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4532#L12 assume !(10 == main_~i~0); 4531#L12-2 assume !(0 == main_~i~0); 4530#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4529#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4528#L12 assume !(10 == main_~i~0); 4527#L12-2 assume !(0 == main_~i~0); 4526#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4525#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4524#L12 assume !(10 == main_~i~0); 4523#L12-2 assume !(0 == main_~i~0); 4522#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4521#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4520#L12 assume !(10 == main_~i~0); 4487#L12-2 assume !(0 == main_~i~0); 4492#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4490#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4486#L12 assume 10 == main_~i~0;main_~up~0 := 0; 4480#L12-2 [2020-11-29 18:49:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:52,770 INFO L82 PathProgramCache]: Analyzing trace with hash -91473322, now seen corresponding path program 8 times [2020-11-29 18:49:52,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:52,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566133694] [2020-11-29 18:49:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566133694] [2020-11-29 18:49:52,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355819978] [2020-11-29 18:49:52,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 18:49:52,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:49:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:52,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:49:52,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:52,921 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 26 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 18:49:52,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:52,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 18:49:52,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378032367] [2020-11-29 18:49:52,922 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 18:49:52,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:52,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1421863859, now seen corresponding path program 9 times [2020-11-29 18:49:52,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:52,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663173655] [2020-11-29 18:49:52,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 113 proven. 136 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:53,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663173655] [2020-11-29 18:49:53,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461058411] [2020-11-29 18:49:53,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:53,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-29 18:49:53,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:53,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:49:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 113 proven. 136 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-29 18:49:53,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:53,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 18:49:53,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375907993] [2020-11-29 18:49:53,090 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 18:49:53,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:53,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:49:53,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:49:53,091 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. cyclomatic complexity: 15 Second operand 12 states. [2020-11-29 18:49:53,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:53,215 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2020-11-29 18:49:53,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:49:53,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 135 transitions. [2020-11-29 18:49:53,217 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 55 [2020-11-29 18:49:53,218 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 120 states and 132 transitions. [2020-11-29 18:49:53,218 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2020-11-29 18:49:53,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2020-11-29 18:49:53,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 120 states and 132 transitions. [2020-11-29 18:49:53,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:53,218 INFO L691 BuchiCegarLoop]: Abstraction has 120 states and 132 transitions. [2020-11-29 18:49:53,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states and 132 transitions. [2020-11-29 18:49:53,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2020-11-29 18:49:53,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-11-29 18:49:53,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 123 transitions. [2020-11-29 18:49:53,221 INFO L714 BuchiCegarLoop]: Abstraction has 112 states and 123 transitions. [2020-11-29 18:49:53,221 INFO L594 BuchiCegarLoop]: Abstraction has 112 states and 123 transitions. [2020-11-29 18:49:53,221 INFO L427 BuchiCegarLoop]: ======== Iteration 19============ [2020-11-29 18:49:53,221 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 112 states and 123 transitions. [2020-11-29 18:49:53,222 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 53 [2020-11-29 18:49:53,222 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:53,222 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:53,223 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:49:53,223 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [13, 12, 12, 10, 3, 1, 1] [2020-11-29 18:49:53,223 INFO L794 eck$LassoCheckResult]: Stem: 4975#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4976#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5003#L12 assume !(10 == main_~i~0); 4994#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 4983#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4979#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4980#L12 assume !(10 == main_~i~0); 4973#L12-2 assume !(0 == main_~i~0); 4974#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4984#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5082#L12 assume !(10 == main_~i~0); 5081#L12-2 assume !(0 == main_~i~0); 5080#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5079#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5078#L12 assume !(10 == main_~i~0); 5077#L12-2 assume !(0 == main_~i~0); 5076#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5075#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5074#L12 assume !(10 == main_~i~0); 5073#L12-2 assume !(0 == main_~i~0); 5072#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5071#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5070#L12 assume !(10 == main_~i~0); 5069#L12-2 assume !(0 == main_~i~0); 5068#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5067#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5066#L12 assume !(10 == main_~i~0); 5065#L12-2 assume !(0 == main_~i~0); 5064#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5063#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5062#L12 assume !(10 == main_~i~0); 5061#L12-2 assume !(0 == main_~i~0); 5060#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5059#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5058#L12 assume !(10 == main_~i~0); 5057#L12-2 assume !(0 == main_~i~0); 5024#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5054#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5025#L12 assume !(10 == main_~i~0); 5023#L12-2 assume !(0 == main_~i~0); 4997#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4995#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4985#L12 assume 10 == main_~i~0;main_~up~0 := 0; 4986#L12-2 [2020-11-29 18:49:53,223 INFO L796 eck$LassoCheckResult]: Loop: 4986#L12-2 assume !(0 == main_~i~0); 5019#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 5017#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5015#L12 assume !(10 == main_~i~0); 5014#L12-2 assume !(0 == main_~i~0); 5013#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 5012#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5010#L12 assume !(10 == main_~i~0); 4990#L12-2 assume !(0 == main_~i~0); 5007#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 5005#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4987#L12 assume !(10 == main_~i~0); 4989#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 5056#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5055#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4991#L12 assume !(10 == main_~i~0); 4971#L12-2 assume !(0 == main_~i~0); 4972#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4977#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4978#L12 assume !(10 == main_~i~0); 5053#L12-2 assume !(0 == main_~i~0); 5052#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5051#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5050#L12 assume !(10 == main_~i~0); 5049#L12-2 assume !(0 == main_~i~0); 5048#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5047#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5046#L12 assume !(10 == main_~i~0); 5045#L12-2 assume !(0 == main_~i~0); 5044#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5043#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5042#L12 assume !(10 == main_~i~0); 5041#L12-2 assume !(0 == main_~i~0); 5040#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5039#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5038#L12 assume !(10 == main_~i~0); 5037#L12-2 assume !(0 == main_~i~0); 5036#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5035#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5034#L12 assume !(10 == main_~i~0); 5033#L12-2 assume !(0 == main_~i~0); 5032#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5031#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5030#L12 assume !(10 == main_~i~0); 5029#L12-2 assume !(0 == main_~i~0); 5028#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5027#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5026#L12 assume !(10 == main_~i~0); 4993#L12-2 assume !(0 == main_~i~0); 4998#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4996#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4992#L12 assume 10 == main_~i~0;main_~up~0 := 0; 4986#L12-2 [2020-11-29 18:49:53,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:53,223 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 9 times [2020-11-29 18:49:53,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:53,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829574174] [2020-11-29 18:49:53,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:53,229 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:53,235 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:53,237 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:53,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:53,238 INFO L82 PathProgramCache]: Analyzing trace with hash -690818020, now seen corresponding path program 10 times [2020-11-29 18:49:53,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:53,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020460454] [2020-11-29 18:49:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:53,245 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:53,251 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:53,253 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:53,254 INFO L82 PathProgramCache]: Analyzing trace with hash -120542630, now seen corresponding path program 2 times [2020-11-29 18:49:53,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:53,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498429174] [2020-11-29 18:49:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 672 proven. 15 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:53,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498429174] [2020-11-29 18:49:53,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276895521] [2020-11-29 18:49:53,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:53,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:49:53,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:53,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 18:49:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1058 backedges. 672 proven. 15 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:53,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:53,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 18:49:53,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110377185] [2020-11-29 18:49:53,652 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 52 [2020-11-29 18:49:53,688 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:53,688 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:53,689 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:53,689 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:53,689 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:53,689 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:53,689 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:53,689 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:53,689 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration19_Loop [2020-11-29 18:49:53,689 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:53,689 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:53,690 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,705 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,719 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,808 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:53,809 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:53,816 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:53,816 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:53,819 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:53,819 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_15=1} Honda state: {v_rep~unnamed0~0~true_15=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:53,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:53,857 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:53,896 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:53,896 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:53,901 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:53,935 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:53,935 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:53,935 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:53,935 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:53,936 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:53,936 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:53,936 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:53,936 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:53,936 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration19_Loop [2020-11-29 18:49:53,936 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:53,936 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:53,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,941 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:53,953 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:54,021 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:54,021 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:54,025 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:54,026 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:54,026 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:54,026 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:54,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:54,027 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:54,027 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:54,031 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:54,057 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:54,058 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:54,058 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:54,058 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:54,058 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:54,059 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:54,060 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:54,060 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:54,062 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:54,064 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:54,064 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 18:49:54,066 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:54,066 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:54,066 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:54,066 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 13 Supporting invariants [] Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:54,086 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:54,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:54,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:54,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:49:54,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:54,225 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:49:54,226 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 5 loop predicates [2020-11-29 18:49:54,226 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 112 states and 123 transitions. cyclomatic complexity: 15 Second operand 7 states. [2020-11-29 18:49:54,421 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 112 states and 123 transitions. cyclomatic complexity: 15. Second operand 7 states. Result 461 states and 502 transitions. Complement of second has 19 states. [2020-11-29 18:49:54,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 10 states 1 stem states 8 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:54,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 18:49:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 44 transitions. [2020-11-29 18:49:54,431 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 44 transitions. Stem has 43 letters. Loop has 52 letters. [2020-11-29 18:49:54,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:54,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 44 transitions. Stem has 95 letters. Loop has 52 letters. [2020-11-29 18:49:54,434 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:54,434 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 44 transitions. Stem has 43 letters. Loop has 104 letters. [2020-11-29 18:49:54,435 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:54,435 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 461 states and 502 transitions. [2020-11-29 18:49:54,439 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 57 [2020-11-29 18:49:54,442 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 461 states to 386 states and 420 transitions. [2020-11-29 18:49:54,442 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 88 [2020-11-29 18:49:54,442 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 91 [2020-11-29 18:49:54,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 386 states and 420 transitions. [2020-11-29 18:49:54,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:54,443 INFO L691 BuchiCegarLoop]: Abstraction has 386 states and 420 transitions. [2020-11-29 18:49:54,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states and 420 transitions. [2020-11-29 18:49:54,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 326. [2020-11-29 18:49:54,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-11-29 18:49:54,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 350 transitions. [2020-11-29 18:49:54,450 INFO L714 BuchiCegarLoop]: Abstraction has 326 states and 350 transitions. [2020-11-29 18:49:54,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:54,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 18:49:54,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 18:49:54,451 INFO L87 Difference]: Start difference. First operand 326 states and 350 transitions. Second operand 6 states. [2020-11-29 18:49:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:54,510 INFO L93 Difference]: Finished difference Result 233 states and 255 transitions. [2020-11-29 18:49:54,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 18:49:54,511 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 233 states and 255 transitions. [2020-11-29 18:49:54,513 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 59 [2020-11-29 18:49:54,514 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 233 states to 207 states and 229 transitions. [2020-11-29 18:49:54,515 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:49:54,515 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:49:54,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 207 states and 229 transitions. [2020-11-29 18:49:54,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:54,515 INFO L691 BuchiCegarLoop]: Abstraction has 207 states and 229 transitions. [2020-11-29 18:49:54,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states and 229 transitions. [2020-11-29 18:49:54,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 120. [2020-11-29 18:49:54,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-29 18:49:54,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2020-11-29 18:49:54,519 INFO L714 BuchiCegarLoop]: Abstraction has 120 states and 132 transitions. [2020-11-29 18:49:54,519 INFO L594 BuchiCegarLoop]: Abstraction has 120 states and 132 transitions. [2020-11-29 18:49:54,519 INFO L427 BuchiCegarLoop]: ======== Iteration 20============ [2020-11-29 18:49:54,519 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 120 states and 132 transitions. [2020-11-29 18:49:54,520 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 57 [2020-11-29 18:49:54,520 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:54,520 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:54,521 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:49:54,521 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [14, 13, 13, 10, 4, 1, 1] [2020-11-29 18:49:54,521 INFO L794 eck$LassoCheckResult]: Stem: 6727#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 6728#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6741#L12 assume !(10 == main_~i~0); 6738#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 6734#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6735#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6809#L12 assume !(10 == main_~i~0); 6808#L12-2 assume !(0 == main_~i~0); 6736#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6731#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6732#L12 assume !(10 == main_~i~0); 6725#L12-2 assume !(0 == main_~i~0); 6726#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6806#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6805#L12 assume !(10 == main_~i~0); 6804#L12-2 assume !(0 == main_~i~0); 6803#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6802#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6801#L12 assume !(10 == main_~i~0); 6800#L12-2 assume !(0 == main_~i~0); 6799#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6798#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6797#L12 assume !(10 == main_~i~0); 6796#L12-2 assume !(0 == main_~i~0); 6795#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6793#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6792#L12 assume !(10 == main_~i~0); 6791#L12-2 assume !(0 == main_~i~0); 6789#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6787#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6785#L12 assume !(10 == main_~i~0); 6783#L12-2 assume !(0 == main_~i~0); 6781#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6779#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6777#L12 assume !(10 == main_~i~0); 6775#L12-2 assume !(0 == main_~i~0); 6765#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6772#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6771#L12 assume !(10 == main_~i~0); 6763#L12-2 assume !(0 == main_~i~0); 6764#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6807#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6794#L12 assume 10 == main_~i~0;main_~up~0 := 0; 6723#L12-2 [2020-11-29 18:49:54,522 INFO L796 eck$LassoCheckResult]: Loop: 6723#L12-2 assume !(0 == main_~i~0); 6724#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 6790#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6788#L12 assume !(10 == main_~i~0); 6786#L12-2 assume !(0 == main_~i~0); 6784#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 6782#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6780#L12 assume !(10 == main_~i~0); 6778#L12-2 assume !(0 == main_~i~0); 6776#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 6774#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6773#L12 assume !(10 == main_~i~0); 6768#L12-2 assume !(0 == main_~i~0); 6770#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 6769#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6766#L12 assume !(10 == main_~i~0); 6760#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 6761#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6842#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6841#L12 assume !(10 == main_~i~0); 6762#L12-2 assume !(0 == main_~i~0); 6737#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6729#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6730#L12 assume !(10 == main_~i~0); 6733#L12-2 assume !(0 == main_~i~0); 6840#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6839#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6838#L12 assume !(10 == main_~i~0); 6837#L12-2 assume !(0 == main_~i~0); 6836#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6835#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6834#L12 assume !(10 == main_~i~0); 6833#L12-2 assume !(0 == main_~i~0); 6832#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6831#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6830#L12 assume !(10 == main_~i~0); 6829#L12-2 assume !(0 == main_~i~0); 6828#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6827#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6826#L12 assume !(10 == main_~i~0); 6825#L12-2 assume !(0 == main_~i~0); 6824#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6823#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6822#L12 assume !(10 == main_~i~0); 6821#L12-2 assume !(0 == main_~i~0); 6820#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6819#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6818#L12 assume !(10 == main_~i~0); 6817#L12-2 assume !(0 == main_~i~0); 6816#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6815#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6813#L12 assume !(10 == main_~i~0); 6810#L12-2 assume !(0 == main_~i~0); 6811#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6814#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6812#L12 assume 10 == main_~i~0;main_~up~0 := 0; 6723#L12-2 [2020-11-29 18:49:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 10 times [2020-11-29 18:49:54,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:54,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547235690] [2020-11-29 18:49:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:54,530 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:54,535 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:54,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:54,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:54,537 INFO L82 PathProgramCache]: Analyzing trace with hash 805924487, now seen corresponding path program 11 times [2020-11-29 18:49:54,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:54,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830610502] [2020-11-29 18:49:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:54,544 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:54,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:54,552 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:54,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:54,552 INFO L82 PathProgramCache]: Analyzing trace with hash 329635269, now seen corresponding path program 3 times [2020-11-29 18:49:54,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:54,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527019791] [2020-11-29 18:49:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 753 proven. 28 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:54,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527019791] [2020-11-29 18:49:54,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710890067] [2020-11-29 18:49:54,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:54,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-11-29 18:49:54,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:54,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 18:49:54,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:54,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 753 proven. 28 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:54,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:54,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 18:49:54,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014678557] [2020-11-29 18:49:55,067 WARN L193 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 55 [2020-11-29 18:49:55,077 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:55,077 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:55,077 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:55,077 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:55,077 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:55,077 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,077 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:55,077 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:55,077 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration20_Loop [2020-11-29 18:49:55,078 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:55,078 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:55,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,085 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,088 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,142 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:55,142 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:55,144 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:55,147 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:55,147 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_17=1} Honda state: {v_rep~unnamed0~0~true_17=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:55,168 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,191 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:55,191 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:55,194 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:55,213 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:55,213 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:55,213 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:55,213 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:55,213 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:55,213 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,213 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:55,213 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:55,213 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration20_Loop [2020-11-29 18:49:55,213 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:55,214 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:55,214 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,219 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,222 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:55,277 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:55,277 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,279 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:55,280 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:55,280 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:55,280 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:55,280 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:55,280 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:55,281 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:55,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:55,283 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:55,285 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:55,285 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:55,287 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:55,287 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:55,287 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:55,287 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 + 7 Supporting invariants [] [2020-11-29 18:49:55,306 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:55,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:55,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:55,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:49:55,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:55,394 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 193 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:49:55,394 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 6 loop predicates [2020-11-29 18:49:55,394 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 120 states and 132 transitions. cyclomatic complexity: 16 Second operand 8 states. [2020-11-29 18:49:55,632 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 120 states and 132 transitions. cyclomatic complexity: 16. Second operand 8 states. Result 549 states and 601 transitions. Complement of second has 23 states. [2020-11-29 18:49:55,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 12 states 1 stem states 10 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:55,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 18:49:55,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 53 transitions. [2020-11-29 18:49:55,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 53 transitions. Stem has 43 letters. Loop has 56 letters. [2020-11-29 18:49:55,638 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:55,638 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 53 transitions. Stem has 99 letters. Loop has 56 letters. [2020-11-29 18:49:55,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:55,639 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 53 transitions. Stem has 43 letters. Loop has 112 letters. [2020-11-29 18:49:55,639 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:55,639 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 549 states and 601 transitions. [2020-11-29 18:49:55,644 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 61 [2020-11-29 18:49:55,647 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 549 states to 434 states and 475 transitions. [2020-11-29 18:49:55,647 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 85 [2020-11-29 18:49:55,647 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 88 [2020-11-29 18:49:55,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 434 states and 475 transitions. [2020-11-29 18:49:55,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:55,647 INFO L691 BuchiCegarLoop]: Abstraction has 434 states and 475 transitions. [2020-11-29 18:49:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states and 475 transitions. [2020-11-29 18:49:55,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 334. [2020-11-29 18:49:55,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-11-29 18:49:55,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 359 transitions. [2020-11-29 18:49:55,655 INFO L714 BuchiCegarLoop]: Abstraction has 334 states and 359 transitions. [2020-11-29 18:49:55,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:55,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 18:49:55,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 18:49:55,656 INFO L87 Difference]: Start difference. First operand 334 states and 359 transitions. Second operand 7 states. [2020-11-29 18:49:55,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:55,768 INFO L93 Difference]: Finished difference Result 261 states and 286 transitions. [2020-11-29 18:49:55,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 18:49:55,775 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 261 states and 286 transitions. [2020-11-29 18:49:55,777 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 63 [2020-11-29 18:49:55,778 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 261 states to 227 states and 252 transitions. [2020-11-29 18:49:55,778 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:49:55,779 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:49:55,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 227 states and 252 transitions. [2020-11-29 18:49:55,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:55,779 INFO L691 BuchiCegarLoop]: Abstraction has 227 states and 252 transitions. [2020-11-29 18:49:55,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states and 252 transitions. [2020-11-29 18:49:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 128. [2020-11-29 18:49:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-11-29 18:49:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2020-11-29 18:49:55,783 INFO L714 BuchiCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-11-29 18:49:55,783 INFO L594 BuchiCegarLoop]: Abstraction has 128 states and 141 transitions. [2020-11-29 18:49:55,783 INFO L427 BuchiCegarLoop]: ======== Iteration 21============ [2020-11-29 18:49:55,783 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 128 states and 141 transitions. [2020-11-29 18:49:55,784 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 61 [2020-11-29 18:49:55,784 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:55,784 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:55,787 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:49:55,787 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [15, 14, 14, 10, 5, 1, 1] [2020-11-29 18:49:55,787 INFO L794 eck$LassoCheckResult]: Stem: 8644#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 8645#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8658#L12 assume !(10 == main_~i~0); 8655#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 8651#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8652#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8734#L12 assume !(10 == main_~i~0); 8733#L12-2 assume !(0 == main_~i~0); 8653#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8648#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8649#L12 assume !(10 == main_~i~0); 8642#L12-2 assume !(0 == main_~i~0); 8643#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8731#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8730#L12 assume !(10 == main_~i~0); 8729#L12-2 assume !(0 == main_~i~0); 8728#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8727#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8726#L12 assume !(10 == main_~i~0); 8725#L12-2 assume !(0 == main_~i~0); 8724#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8722#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8721#L12 assume !(10 == main_~i~0); 8720#L12-2 assume !(0 == main_~i~0); 8718#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8716#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8714#L12 assume !(10 == main_~i~0); 8712#L12-2 assume !(0 == main_~i~0); 8710#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8708#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8706#L12 assume !(10 == main_~i~0); 8704#L12-2 assume !(0 == main_~i~0); 8702#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8700#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8698#L12 assume !(10 == main_~i~0); 8696#L12-2 assume !(0 == main_~i~0); 8686#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8693#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8692#L12 assume !(10 == main_~i~0); 8684#L12-2 assume !(0 == main_~i~0); 8685#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8732#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8723#L12 assume 10 == main_~i~0;main_~up~0 := 0; 8640#L12-2 [2020-11-29 18:49:55,788 INFO L796 eck$LassoCheckResult]: Loop: 8640#L12-2 assume !(0 == main_~i~0); 8641#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 8719#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8717#L12 assume !(10 == main_~i~0); 8715#L12-2 assume !(0 == main_~i~0); 8713#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 8711#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8709#L12 assume !(10 == main_~i~0); 8707#L12-2 assume !(0 == main_~i~0); 8705#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 8703#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8701#L12 assume !(10 == main_~i~0); 8699#L12-2 assume !(0 == main_~i~0); 8697#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 8695#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8694#L12 assume !(10 == main_~i~0); 8689#L12-2 assume !(0 == main_~i~0); 8691#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 8690#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8687#L12 assume !(10 == main_~i~0); 8681#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 8682#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8767#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8766#L12 assume !(10 == main_~i~0); 8683#L12-2 assume !(0 == main_~i~0); 8654#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8646#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8647#L12 assume !(10 == main_~i~0); 8650#L12-2 assume !(0 == main_~i~0); 8765#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8764#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8763#L12 assume !(10 == main_~i~0); 8762#L12-2 assume !(0 == main_~i~0); 8761#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8760#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8759#L12 assume !(10 == main_~i~0); 8758#L12-2 assume !(0 == main_~i~0); 8757#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8756#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8755#L12 assume !(10 == main_~i~0); 8754#L12-2 assume !(0 == main_~i~0); 8753#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8752#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8751#L12 assume !(10 == main_~i~0); 8750#L12-2 assume !(0 == main_~i~0); 8749#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8748#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8747#L12 assume !(10 == main_~i~0); 8746#L12-2 assume !(0 == main_~i~0); 8745#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8744#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8743#L12 assume !(10 == main_~i~0); 8742#L12-2 assume !(0 == main_~i~0); 8741#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8739#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8737#L12 assume !(10 == main_~i~0); 8735#L12-2 assume !(0 == main_~i~0); 8736#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8740#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8738#L12 assume 10 == main_~i~0;main_~up~0 := 0; 8640#L12-2 [2020-11-29 18:49:55,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:55,788 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 11 times [2020-11-29 18:49:55,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:55,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28799085] [2020-11-29 18:49:55,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:55,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:55,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:55,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:55,804 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:55,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:55,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1151943822, now seen corresponding path program 12 times [2020-11-29 18:49:55,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:55,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386397833] [2020-11-29 18:49:55,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:55,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:55,811 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:55,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:55,816 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:55,819 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:55,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:55,820 INFO L82 PathProgramCache]: Analyzing trace with hash 533812144, now seen corresponding path program 4 times [2020-11-29 18:49:55,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:55,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984650112] [2020-11-29 18:49:55,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 834 proven. 45 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:55,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984650112] [2020-11-29 18:49:55,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680002244] [2020-11-29 18:49:55,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:55,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 18:49:55,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 18:49:55,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 834 proven. 45 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:55,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:55,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 18:49:55,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152826440] [2020-11-29 18:49:56,338 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 58 [2020-11-29 18:49:56,348 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:56,348 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:56,348 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:56,348 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:56,348 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:56,348 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,348 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:56,349 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:56,349 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration21_Loop [2020-11-29 18:49:56,349 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:56,349 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:56,349 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,373 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,449 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:56,449 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 91 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 91 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,455 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:56,456 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:56,458 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:56,458 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 92 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 92 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,479 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:56,479 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:56,481 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:56,481 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_19=0} Honda state: {v_rep~unnamed0~0~false_19=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 93 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 93 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:56,502 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:56,504 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:56,504 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_19=1} Honda state: {v_rep~unnamed0~0~true_19=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 94 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 94 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,524 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:56,525 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 95 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 95 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:56,547 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:56,550 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:56,569 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:56,569 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:56,569 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:56,569 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:56,569 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:56,569 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,569 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:56,570 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:56,570 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration21_Loop [2020-11-29 18:49:56,570 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:56,570 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:56,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,574 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,583 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:56,635 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:56,635 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,637 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:56,638 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:56,638 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:56,638 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:56,639 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:56,640 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:56,640 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:56,642 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,663 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:56,665 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:56,665 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:56,665 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:56,665 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:56,666 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:56,666 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:56,669 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,689 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:56,690 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:56,690 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:56,690 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:56,691 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:56,691 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:56,692 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:56,692 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:56,693 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,721 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:56,722 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:56,722 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:56,723 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:56,723 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:56,723 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:56,723 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:56,723 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:56,725 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:56,727 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:56,727 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:56,729 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:56,729 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:56,729 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:56,729 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 15 Supporting invariants [] [2020-11-29 18:49:56,749 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:56,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:56,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:56,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:56,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:49:56,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 249 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:49:56,918 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 7 loop predicates [2020-11-29 18:49:56,918 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 128 states and 141 transitions. cyclomatic complexity: 17 Second operand 9 states. [2020-11-29 18:49:57,269 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 128 states and 141 transitions. cyclomatic complexity: 17. Second operand 9 states. Result 653 states and 718 transitions. Complement of second has 27 states. [2020-11-29 18:49:57,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 1 stem states 12 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:57,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 18:49:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 62 transitions. [2020-11-29 18:49:57,275 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 62 transitions. Stem has 43 letters. Loop has 60 letters. [2020-11-29 18:49:57,276 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:57,276 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 62 transitions. Stem has 103 letters. Loop has 60 letters. [2020-11-29 18:49:57,277 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:57,277 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 62 transitions. Stem has 43 letters. Loop has 120 letters. [2020-11-29 18:49:57,278 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:57,278 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 653 states and 718 transitions. [2020-11-29 18:49:57,284 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 65 [2020-11-29 18:49:57,287 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 653 states to 490 states and 539 transitions. [2020-11-29 18:49:57,287 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 82 [2020-11-29 18:49:57,288 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 85 [2020-11-29 18:49:57,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 490 states and 539 transitions. [2020-11-29 18:49:57,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:57,288 INFO L691 BuchiCegarLoop]: Abstraction has 490 states and 539 transitions. [2020-11-29 18:49:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states and 539 transitions. [2020-11-29 18:49:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 342. [2020-11-29 18:49:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-29 18:49:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 368 transitions. [2020-11-29 18:49:57,296 INFO L714 BuchiCegarLoop]: Abstraction has 342 states and 368 transitions. [2020-11-29 18:49:57,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 18:49:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 18:49:57,296 INFO L87 Difference]: Start difference. First operand 342 states and 368 transitions. Second operand 8 states. [2020-11-29 18:49:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:57,361 INFO L93 Difference]: Finished difference Result 289 states and 317 transitions. [2020-11-29 18:49:57,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 18:49:57,361 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 289 states and 317 transitions. [2020-11-29 18:49:57,364 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 67 [2020-11-29 18:49:57,365 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 289 states to 247 states and 275 transitions. [2020-11-29 18:49:57,366 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:49:57,366 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:49:57,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 247 states and 275 transitions. [2020-11-29 18:49:57,366 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:57,366 INFO L691 BuchiCegarLoop]: Abstraction has 247 states and 275 transitions. [2020-11-29 18:49:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states and 275 transitions. [2020-11-29 18:49:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 136. [2020-11-29 18:49:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-11-29 18:49:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 150 transitions. [2020-11-29 18:49:57,369 INFO L714 BuchiCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-11-29 18:49:57,369 INFO L594 BuchiCegarLoop]: Abstraction has 136 states and 150 transitions. [2020-11-29 18:49:57,369 INFO L427 BuchiCegarLoop]: ======== Iteration 22============ [2020-11-29 18:49:57,369 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 136 states and 150 transitions. [2020-11-29 18:49:57,370 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 65 [2020-11-29 18:49:57,370 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:57,370 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:57,372 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:49:57,372 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [16, 15, 15, 10, 6, 1, 1] [2020-11-29 18:49:57,372 INFO L794 eck$LassoCheckResult]: Stem: 10742#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 10743#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10753#L12 assume !(10 == main_~i~0); 10752#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 10749#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10746#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10747#L12 assume !(10 == main_~i~0); 10740#L12-2 assume !(0 == main_~i~0); 10741#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10750#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10840#L12 assume !(10 == main_~i~0); 10839#L12-2 assume !(0 == main_~i~0); 10837#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10836#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10835#L12 assume !(10 == main_~i~0); 10834#L12-2 assume !(0 == main_~i~0); 10833#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10831#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10830#L12 assume !(10 == main_~i~0); 10829#L12-2 assume !(0 == main_~i~0); 10827#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10825#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10823#L12 assume !(10 == main_~i~0); 10821#L12-2 assume !(0 == main_~i~0); 10819#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10817#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10815#L12 assume !(10 == main_~i~0); 10813#L12-2 assume !(0 == main_~i~0); 10811#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10809#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10807#L12 assume !(10 == main_~i~0); 10805#L12-2 assume !(0 == main_~i~0); 10803#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10801#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10799#L12 assume !(10 == main_~i~0); 10797#L12-2 assume !(0 == main_~i~0); 10787#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10794#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10793#L12 assume !(10 == main_~i~0); 10785#L12-2 assume !(0 == main_~i~0); 10786#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10838#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10832#L12 assume 10 == main_~i~0;main_~up~0 := 0; 10738#L12-2 [2020-11-29 18:49:57,372 INFO L796 eck$LassoCheckResult]: Loop: 10738#L12-2 assume !(0 == main_~i~0); 10739#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 10828#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10826#L12 assume !(10 == main_~i~0); 10824#L12-2 assume !(0 == main_~i~0); 10822#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 10820#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10818#L12 assume !(10 == main_~i~0); 10816#L12-2 assume !(0 == main_~i~0); 10814#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 10812#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10810#L12 assume !(10 == main_~i~0); 10808#L12-2 assume !(0 == main_~i~0); 10806#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 10804#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10802#L12 assume !(10 == main_~i~0); 10800#L12-2 assume !(0 == main_~i~0); 10798#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 10796#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10795#L12 assume !(10 == main_~i~0); 10790#L12-2 assume !(0 == main_~i~0); 10792#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 10791#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10788#L12 assume !(10 == main_~i~0); 10782#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 10783#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10873#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10872#L12 assume !(10 == main_~i~0); 10784#L12-2 assume !(0 == main_~i~0); 10751#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10744#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10745#L12 assume !(10 == main_~i~0); 10748#L12-2 assume !(0 == main_~i~0); 10871#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10870#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10869#L12 assume !(10 == main_~i~0); 10868#L12-2 assume !(0 == main_~i~0); 10867#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10866#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10865#L12 assume !(10 == main_~i~0); 10864#L12-2 assume !(0 == main_~i~0); 10863#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10862#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10861#L12 assume !(10 == main_~i~0); 10860#L12-2 assume !(0 == main_~i~0); 10859#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10858#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10857#L12 assume !(10 == main_~i~0); 10856#L12-2 assume !(0 == main_~i~0); 10855#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10854#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10853#L12 assume !(10 == main_~i~0); 10852#L12-2 assume !(0 == main_~i~0); 10851#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10850#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10849#L12 assume !(10 == main_~i~0); 10848#L12-2 assume !(0 == main_~i~0); 10847#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10846#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10844#L12 assume !(10 == main_~i~0); 10841#L12-2 assume !(0 == main_~i~0); 10842#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 10845#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10843#L12 assume 10 == main_~i~0;main_~up~0 := 0; 10738#L12-2 [2020-11-29 18:49:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:57,373 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 12 times [2020-11-29 18:49:57,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:57,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513425161] [2020-11-29 18:49:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:57,378 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:57,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:57,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:57,388 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:57,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:57,388 INFO L82 PathProgramCache]: Analyzing trace with hash 336435933, now seen corresponding path program 13 times [2020-11-29 18:49:57,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:57,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919026147] [2020-11-29 18:49:57,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:57,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:57,397 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:57,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:57,403 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:57,406 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:57,407 INFO L82 PathProgramCache]: Analyzing trace with hash 216392731, now seen corresponding path program 5 times [2020-11-29 18:49:57,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:57,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427293680] [2020-11-29 18:49:57,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 915 proven. 66 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427293680] [2020-11-29 18:49:57,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615031207] [2020-11-29 18:49:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:57,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-29 18:49:57,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:57,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 18:49:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:57,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 915 proven. 66 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:57,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:57,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 18:49:57,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834260245] [2020-11-29 18:49:58,032 WARN L193 SmtUtils]: Spent 453.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 65 [2020-11-29 18:49:58,045 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:58,045 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:58,046 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:58,046 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:58,046 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:58,046 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,046 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:58,046 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:58,046 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration22_Loop [2020-11-29 18:49:58,046 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:58,046 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:58,047 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,055 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,127 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:58,127 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 102 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 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,129 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:58,129 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:58,132 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:58,132 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 103 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 103 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,153 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:58,153 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:58,156 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:49:58,156 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_21=0} Honda state: {v_rep~unnamed0~0~false_21=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 104 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 104 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,176 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:58,176 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,198 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:58,198 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:58,311 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:58,313 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:58,313 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:58,313 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:58,313 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:58,313 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:58,313 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,313 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:58,313 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:58,313 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration22_Loop [2020-11-29 18:49:58,314 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:58,314 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:58,314 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,323 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,325 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:58,402 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:58,403 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,405 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:58,406 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:58,406 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:58,406 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:58,406 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-11-29 18:49:58,406 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:58,407 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-11-29 18:49:58,407 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:58,409 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,429 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:58,430 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:58,431 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:58,431 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:58,431 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:58,432 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:58,432 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:58,434 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,455 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 [2020-11-29 18:49:58,458 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:58,459 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:58,459 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:58,459 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:58,469 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:49:58,469 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:49:58,471 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,492 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:49:58,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:49:58,493 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:49:58,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:49:58,493 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:49:58,493 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:49:58,494 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:49:58,494 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:49:58,496 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:49:58,498 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:49:58,498 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:58,499 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:49:58,499 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:49:58,500 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:49:58,500 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 + 8 Supporting invariants [] [2020-11-29 18:49:58,519 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:49:58,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:58,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:49:58,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:58,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:58,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:49:58,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:49:58,698 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 8 loop predicates [2020-11-29 18:49:58,699 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 136 states and 150 transitions. cyclomatic complexity: 18 Second operand 10 states. [2020-11-29 18:49:59,025 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 136 states and 150 transitions. cyclomatic complexity: 18. Second operand 10 states. Result 773 states and 853 transitions. Complement of second has 31 states. [2020-11-29 18:49:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 16 states 1 stem states 14 non-accepting loop states 1 accepting loop states [2020-11-29 18:49:59,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 18:49:59,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 71 transitions. [2020-11-29 18:49:59,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 71 transitions. Stem has 43 letters. Loop has 64 letters. [2020-11-29 18:49:59,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:59,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 71 transitions. Stem has 107 letters. Loop has 64 letters. [2020-11-29 18:49:59,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:59,027 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 71 transitions. Stem has 43 letters. Loop has 128 letters. [2020-11-29 18:49:59,027 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:49:59,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 773 states and 853 transitions. [2020-11-29 18:49:59,032 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 69 [2020-11-29 18:49:59,036 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 773 states to 554 states and 612 transitions. [2020-11-29 18:49:59,036 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 79 [2020-11-29 18:49:59,036 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 82 [2020-11-29 18:49:59,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 554 states and 612 transitions. [2020-11-29 18:49:59,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:59,037 INFO L691 BuchiCegarLoop]: Abstraction has 554 states and 612 transitions. [2020-11-29 18:49:59,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states and 612 transitions. [2020-11-29 18:49:59,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 350. [2020-11-29 18:49:59,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-11-29 18:49:59,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 377 transitions. [2020-11-29 18:49:59,044 INFO L714 BuchiCegarLoop]: Abstraction has 350 states and 377 transitions. [2020-11-29 18:49:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:49:59,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 18:49:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 18:49:59,045 INFO L87 Difference]: Start difference. First operand 350 states and 377 transitions. Second operand 9 states. [2020-11-29 18:49:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:49:59,130 INFO L93 Difference]: Finished difference Result 317 states and 348 transitions. [2020-11-29 18:49:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 18:49:59,130 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 317 states and 348 transitions. [2020-11-29 18:49:59,132 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 71 [2020-11-29 18:49:59,133 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 317 states to 267 states and 298 transitions. [2020-11-29 18:49:59,134 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:49:59,134 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:49:59,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 267 states and 298 transitions. [2020-11-29 18:49:59,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:49:59,135 INFO L691 BuchiCegarLoop]: Abstraction has 267 states and 298 transitions. [2020-11-29 18:49:59,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states and 298 transitions. [2020-11-29 18:49:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 144. [2020-11-29 18:49:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-29 18:49:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 159 transitions. [2020-11-29 18:49:59,138 INFO L714 BuchiCegarLoop]: Abstraction has 144 states and 159 transitions. [2020-11-29 18:49:59,138 INFO L594 BuchiCegarLoop]: Abstraction has 144 states and 159 transitions. [2020-11-29 18:49:59,138 INFO L427 BuchiCegarLoop]: ======== Iteration 23============ [2020-11-29 18:49:59,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 144 states and 159 transitions. [2020-11-29 18:49:59,139 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 69 [2020-11-29 18:49:59,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:49:59,140 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:49:59,141 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:49:59,141 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [17, 16, 16, 10, 7, 1, 1] [2020-11-29 18:49:59,141 INFO L794 eck$LassoCheckResult]: Stem: 13037#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 13038#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13050#L12 assume !(10 == main_~i~0); 13047#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 13044#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13041#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13042#L12 assume !(10 == main_~i~0); 13035#L12-2 assume !(0 == main_~i~0); 13036#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13045#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13143#L12 assume !(10 == main_~i~0); 13142#L12-2 assume !(0 == main_~i~0); 13140#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13138#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13137#L12 assume !(10 == main_~i~0); 13136#L12-2 assume !(0 == main_~i~0); 13134#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13132#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13130#L12 assume !(10 == main_~i~0); 13128#L12-2 assume !(0 == main_~i~0); 13126#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13124#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13122#L12 assume !(10 == main_~i~0); 13120#L12-2 assume !(0 == main_~i~0); 13118#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13116#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13114#L12 assume !(10 == main_~i~0); 13112#L12-2 assume !(0 == main_~i~0); 13110#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13108#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13106#L12 assume !(10 == main_~i~0); 13104#L12-2 assume !(0 == main_~i~0); 13102#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13100#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13098#L12 assume !(10 == main_~i~0); 13096#L12-2 assume !(0 == main_~i~0); 13085#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13093#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13092#L12 assume !(10 == main_~i~0); 13083#L12-2 assume !(0 == main_~i~0); 13084#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13141#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13139#L12 assume 10 == main_~i~0;main_~up~0 := 0; 13033#L12-2 [2020-11-29 18:49:59,141 INFO L796 eck$LassoCheckResult]: Loop: 13033#L12-2 assume !(0 == main_~i~0); 13034#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13135#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13133#L12 assume !(10 == main_~i~0); 13131#L12-2 assume !(0 == main_~i~0); 13129#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13127#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13125#L12 assume !(10 == main_~i~0); 13123#L12-2 assume !(0 == main_~i~0); 13121#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13119#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13117#L12 assume !(10 == main_~i~0); 13115#L12-2 assume !(0 == main_~i~0); 13113#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13111#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13109#L12 assume !(10 == main_~i~0); 13107#L12-2 assume !(0 == main_~i~0); 13105#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13103#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13101#L12 assume !(10 == main_~i~0); 13099#L12-2 assume !(0 == main_~i~0); 13097#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13095#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13094#L12 assume !(10 == main_~i~0); 13089#L12-2 assume !(0 == main_~i~0); 13091#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 13090#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13087#L12 assume !(10 == main_~i~0); 13081#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 13082#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13176#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13175#L12 assume !(10 == main_~i~0); 13086#L12-2 assume !(0 == main_~i~0); 13046#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13039#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13040#L12 assume !(10 == main_~i~0); 13043#L12-2 assume !(0 == main_~i~0); 13174#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13173#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13172#L12 assume !(10 == main_~i~0); 13171#L12-2 assume !(0 == main_~i~0); 13170#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13169#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13168#L12 assume !(10 == main_~i~0); 13167#L12-2 assume !(0 == main_~i~0); 13166#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13165#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13164#L12 assume !(10 == main_~i~0); 13163#L12-2 assume !(0 == main_~i~0); 13162#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13161#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13160#L12 assume !(10 == main_~i~0); 13159#L12-2 assume !(0 == main_~i~0); 13158#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13157#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13156#L12 assume !(10 == main_~i~0); 13155#L12-2 assume !(0 == main_~i~0); 13154#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13153#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13152#L12 assume !(10 == main_~i~0); 13151#L12-2 assume !(0 == main_~i~0); 13150#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13148#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13146#L12 assume !(10 == main_~i~0); 13144#L12-2 assume !(0 == main_~i~0); 13145#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 13149#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13147#L12 assume 10 == main_~i~0;main_~up~0 := 0; 13033#L12-2 [2020-11-29 18:49:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:59,142 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 13 times [2020-11-29 18:49:59,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:59,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256980382] [2020-11-29 18:49:59,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:59,147 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:59,151 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:59,153 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:59,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1847643336, now seen corresponding path program 14 times [2020-11-29 18:49:59,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:59,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207863928] [2020-11-29 18:49:59,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:59,160 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:49:59,166 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:49:59,168 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:49:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:49:59,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1125533446, now seen corresponding path program 6 times [2020-11-29 18:49:59,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:49:59,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336612110] [2020-11-29 18:49:59,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:49:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:49:59,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 996 proven. 91 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:59,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336612110] [2020-11-29 18:49:59,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072309841] [2020-11-29 18:49:59,298 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:49:59,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2020-11-29 18:49:59,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:49:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 18:49:59,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:49:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1458 backedges. 996 proven. 91 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:49:59,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:49:59,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 18:49:59,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224906887] [2020-11-29 18:49:59,819 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 64 [2020-11-29 18:49:59,828 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:59,828 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:59,828 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:59,828 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:59,828 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:49:59,828 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:59,828 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:59,828 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:59,828 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration23_Loop [2020-11-29 18:49:59,828 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:59,828 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:59,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,840 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,903 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:49:59,903 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:59,905 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:49:59,905 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:59,928 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:49:59,928 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:49:59,931 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:49:59,950 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:49:59,950 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:49:59,950 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:49:59,950 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:49:59,950 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:49:59,950 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:49:59,950 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:49:59,950 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:49:59,951 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration23_Loop [2020-11-29 18:49:59,951 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:49:59,951 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:49:59,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:49:59,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:00,029 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:50:00,029 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:00,031 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:50:00,032 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:50:00,032 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:50:00,032 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:50:00,032 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:50:00,032 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:50:00,033 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:50:00,033 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:50:00,035 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:50:00,037 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:50:00,037 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:00,039 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:50:00,039 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:50:00,039 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:50:00,039 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 17 Supporting invariants [] [2020-11-29 18:50:00,058 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:50:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:00,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:00,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:50:00,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:00,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:50:00,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:00,199 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 373 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:50:00,199 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 9 loop predicates [2020-11-29 18:50:00,199 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 144 states and 159 transitions. cyclomatic complexity: 19 Second operand 11 states. [2020-11-29 18:50:00,688 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 144 states and 159 transitions. cyclomatic complexity: 19. Second operand 11 states. Result 909 states and 1006 transitions. Complement of second has 35 states. [2020-11-29 18:50:00,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 1 stem states 16 non-accepting loop states 1 accepting loop states [2020-11-29 18:50:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 18:50:00,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 80 transitions. [2020-11-29 18:50:00,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 80 transitions. Stem has 43 letters. Loop has 68 letters. [2020-11-29 18:50:00,689 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:00,689 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 80 transitions. Stem has 111 letters. Loop has 68 letters. [2020-11-29 18:50:00,690 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:00,690 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 80 transitions. Stem has 43 letters. Loop has 136 letters. [2020-11-29 18:50:00,691 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:00,691 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 909 states and 1006 transitions. [2020-11-29 18:50:00,697 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 73 [2020-11-29 18:50:00,701 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 909 states to 626 states and 694 transitions. [2020-11-29 18:50:00,701 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 76 [2020-11-29 18:50:00,701 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 79 [2020-11-29 18:50:00,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 626 states and 694 transitions. [2020-11-29 18:50:00,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:50:00,702 INFO L691 BuchiCegarLoop]: Abstraction has 626 states and 694 transitions. [2020-11-29 18:50:00,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states and 694 transitions. [2020-11-29 18:50:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 358. [2020-11-29 18:50:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-11-29 18:50:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 386 transitions. [2020-11-29 18:50:00,710 INFO L714 BuchiCegarLoop]: Abstraction has 358 states and 386 transitions. [2020-11-29 18:50:00,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:50:00,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 18:50:00,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 18:50:00,711 INFO L87 Difference]: Start difference. First operand 358 states and 386 transitions. Second operand 10 states. [2020-11-29 18:50:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:50:00,822 INFO L93 Difference]: Finished difference Result 345 states and 379 transitions. [2020-11-29 18:50:00,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 18:50:00,823 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 345 states and 379 transitions. [2020-11-29 18:50:00,825 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 75 [2020-11-29 18:50:00,827 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 345 states to 287 states and 321 transitions. [2020-11-29 18:50:00,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:50:00,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:50:00,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 287 states and 321 transitions. [2020-11-29 18:50:00,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:50:00,827 INFO L691 BuchiCegarLoop]: Abstraction has 287 states and 321 transitions. [2020-11-29 18:50:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states and 321 transitions. [2020-11-29 18:50:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 152. [2020-11-29 18:50:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-11-29 18:50:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2020-11-29 18:50:00,831 INFO L714 BuchiCegarLoop]: Abstraction has 152 states and 168 transitions. [2020-11-29 18:50:00,831 INFO L594 BuchiCegarLoop]: Abstraction has 152 states and 168 transitions. [2020-11-29 18:50:00,831 INFO L427 BuchiCegarLoop]: ======== Iteration 24============ [2020-11-29 18:50:00,831 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 152 states and 168 transitions. [2020-11-29 18:50:00,832 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 73 [2020-11-29 18:50:00,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:50:00,833 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:50:00,833 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:50:00,833 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [18, 17, 17, 10, 8, 1, 1] [2020-11-29 18:50:00,834 INFO L794 eck$LassoCheckResult]: Stem: 15545#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 15546#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15559#L12 assume !(10 == main_~i~0); 15556#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 15552#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15549#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15550#L12 assume !(10 == main_~i~0); 15543#L12-2 assume !(0 == main_~i~0); 15544#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15553#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15658#L12 assume !(10 == main_~i~0); 15657#L12-2 assume !(0 == main_~i~0); 15655#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15653#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15651#L12 assume !(10 == main_~i~0); 15649#L12-2 assume !(0 == main_~i~0); 15647#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15645#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15643#L12 assume !(10 == main_~i~0); 15641#L12-2 assume !(0 == main_~i~0); 15639#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15637#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15635#L12 assume !(10 == main_~i~0); 15633#L12-2 assume !(0 == main_~i~0); 15631#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15629#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15627#L12 assume !(10 == main_~i~0); 15625#L12-2 assume !(0 == main_~i~0); 15623#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15621#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15619#L12 assume !(10 == main_~i~0); 15617#L12-2 assume !(0 == main_~i~0); 15615#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15613#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15611#L12 assume !(10 == main_~i~0); 15609#L12-2 assume !(0 == main_~i~0); 15599#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15606#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15605#L12 assume !(10 == main_~i~0); 15597#L12-2 assume !(0 == main_~i~0); 15598#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15660#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15659#L12 assume 10 == main_~i~0;main_~up~0 := 0; 15541#L12-2 [2020-11-29 18:50:00,834 INFO L796 eck$LassoCheckResult]: Loop: 15541#L12-2 assume !(0 == main_~i~0); 15542#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15656#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15654#L12 assume !(10 == main_~i~0); 15652#L12-2 assume !(0 == main_~i~0); 15650#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15648#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15646#L12 assume !(10 == main_~i~0); 15644#L12-2 assume !(0 == main_~i~0); 15642#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15640#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15638#L12 assume !(10 == main_~i~0); 15636#L12-2 assume !(0 == main_~i~0); 15634#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15632#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15630#L12 assume !(10 == main_~i~0); 15628#L12-2 assume !(0 == main_~i~0); 15626#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15624#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15622#L12 assume !(10 == main_~i~0); 15620#L12-2 assume !(0 == main_~i~0); 15618#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15616#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15614#L12 assume !(10 == main_~i~0); 15612#L12-2 assume !(0 == main_~i~0); 15610#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15608#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15607#L12 assume !(10 == main_~i~0); 15602#L12-2 assume !(0 == main_~i~0); 15604#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 15603#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15600#L12 assume !(10 == main_~i~0); 15594#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 15554#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15555#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15692#L12 assume !(10 == main_~i~0); 15595#L12-2 assume !(0 == main_~i~0); 15596#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15547#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15548#L12 assume !(10 == main_~i~0); 15551#L12-2 assume !(0 == main_~i~0); 15691#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15690#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15689#L12 assume !(10 == main_~i~0); 15688#L12-2 assume !(0 == main_~i~0); 15687#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15686#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15685#L12 assume !(10 == main_~i~0); 15684#L12-2 assume !(0 == main_~i~0); 15683#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15682#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15681#L12 assume !(10 == main_~i~0); 15680#L12-2 assume !(0 == main_~i~0); 15679#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15678#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15677#L12 assume !(10 == main_~i~0); 15676#L12-2 assume !(0 == main_~i~0); 15675#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15674#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15673#L12 assume !(10 == main_~i~0); 15672#L12-2 assume !(0 == main_~i~0); 15671#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15670#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15669#L12 assume !(10 == main_~i~0); 15668#L12-2 assume !(0 == main_~i~0); 15667#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15665#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15663#L12 assume !(10 == main_~i~0); 15661#L12-2 assume !(0 == main_~i~0); 15662#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 15666#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15664#L12 assume 10 == main_~i~0;main_~up~0 := 0; 15541#L12-2 [2020-11-29 18:50:00,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:00,834 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 14 times [2020-11-29 18:50:00,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:00,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882993508] [2020-11-29 18:50:00,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:00,841 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:00,844 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:00,851 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1176703283, now seen corresponding path program 15 times [2020-11-29 18:50:00,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:00,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588004798] [2020-11-29 18:50:00,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:00,859 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:00,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:00,865 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:00,889 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:00,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1395997809, now seen corresponding path program 7 times [2020-11-29 18:50:00,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:00,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078384221] [2020-11-29 18:50:00,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:00,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 1077 proven. 120 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:50:01,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078384221] [2020-11-29 18:50:01,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591066370] [2020-11-29 18:50:01,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:50:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:01,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 18:50:01,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:01,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1568 backedges. 1077 proven. 120 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:50:01,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:50:01,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 18:50:01,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831396721] [2020-11-29 18:50:01,537 WARN L193 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 67 [2020-11-29 18:50:01,545 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:50:01,545 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:50:01,546 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:50:01,546 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:50:01,546 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:50:01,546 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,546 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:50:01,546 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:50:01,546 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration24_Loop [2020-11-29 18:50:01,546 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:50:01,546 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:50:01,547 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,551 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,554 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,556 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,608 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:50:01,608 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,611 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:50:01,611 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 118 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 118 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,634 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:50:01,634 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:50:01,637 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:50:01,656 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:50:01,656 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:50:01,656 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:50:01,656 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:50:01,656 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:50:01,656 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:50:01,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:50:01,656 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration24_Loop [2020-11-29 18:50:01,657 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:50:01,657 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:50:01,657 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,660 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,665 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,667 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:01,723 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:50:01,723 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,725 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:50:01,726 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:50:01,726 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:50:01,726 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:50:01,726 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:50:01,728 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:50:01,728 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:50:01,730 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,757 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:50:01,758 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:50:01,758 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:50:01,758 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:50:01,758 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:50:01,759 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:50:01,759 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:50:01,759 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:50:01,761 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:50:01,763 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:50:01,763 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:01,765 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:50:01,765 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:50:01,765 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:50:01,765 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 + 9 Supporting invariants [] [2020-11-29 18:50:01,785 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:50:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:01,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:50:01,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:01,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 18:50:01,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:01,964 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:50:01,965 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 10 loop predicates [2020-11-29 18:50:01,965 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 152 states and 168 transitions. cyclomatic complexity: 20 Second operand 12 states. [2020-11-29 18:50:02,534 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 152 states and 168 transitions. cyclomatic complexity: 20. Second operand 12 states. Result 1066 states and 1182 transitions. Complement of second has 39 states. [2020-11-29 18:50:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 20 states 1 stem states 18 non-accepting loop states 1 accepting loop states [2020-11-29 18:50:02,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 18:50:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 89 transitions. [2020-11-29 18:50:02,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 89 transitions. Stem has 43 letters. Loop has 72 letters. [2020-11-29 18:50:02,536 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:02,536 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 89 transitions. Stem has 115 letters. Loop has 72 letters. [2020-11-29 18:50:02,537 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:02,537 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 89 transitions. Stem has 43 letters. Loop has 144 letters. [2020-11-29 18:50:02,538 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:02,538 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1066 states and 1182 transitions. [2020-11-29 18:50:02,546 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 77 [2020-11-29 18:50:02,552 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1066 states to 711 states and 790 transitions. [2020-11-29 18:50:02,553 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2020-11-29 18:50:02,553 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 76 [2020-11-29 18:50:02,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 711 states and 790 transitions. [2020-11-29 18:50:02,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:50:02,553 INFO L691 BuchiCegarLoop]: Abstraction has 711 states and 790 transitions. [2020-11-29 18:50:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states and 790 transitions. [2020-11-29 18:50:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 370. [2020-11-29 18:50:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-11-29 18:50:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 399 transitions. [2020-11-29 18:50:02,562 INFO L714 BuchiCegarLoop]: Abstraction has 370 states and 399 transitions. [2020-11-29 18:50:02,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:50:02,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 18:50:02,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 18:50:02,563 INFO L87 Difference]: Start difference. First operand 370 states and 399 transitions. Second operand 11 states. [2020-11-29 18:50:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:50:02,676 INFO L93 Difference]: Finished difference Result 373 states and 410 transitions. [2020-11-29 18:50:02,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 18:50:02,677 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 373 states and 410 transitions. [2020-11-29 18:50:02,679 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 79 [2020-11-29 18:50:02,681 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 373 states to 307 states and 344 transitions. [2020-11-29 18:50:02,682 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:50:02,682 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:50:02,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 307 states and 344 transitions. [2020-11-29 18:50:02,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:50:02,682 INFO L691 BuchiCegarLoop]: Abstraction has 307 states and 344 transitions. [2020-11-29 18:50:02,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states and 344 transitions. [2020-11-29 18:50:02,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 160. [2020-11-29 18:50:02,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-11-29 18:50:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 177 transitions. [2020-11-29 18:50:02,687 INFO L714 BuchiCegarLoop]: Abstraction has 160 states and 177 transitions. [2020-11-29 18:50:02,687 INFO L594 BuchiCegarLoop]: Abstraction has 160 states and 177 transitions. [2020-11-29 18:50:02,687 INFO L427 BuchiCegarLoop]: ======== Iteration 25============ [2020-11-29 18:50:02,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 160 states and 177 transitions. [2020-11-29 18:50:02,688 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 77 [2020-11-29 18:50:02,688 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:50:02,688 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:50:02,689 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:50:02,689 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [19, 18, 18, 10, 9, 1, 1] [2020-11-29 18:50:02,689 INFO L794 eck$LassoCheckResult]: Stem: 18290#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 18291#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18305#L12 assume !(10 == main_~i~0); 18302#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 18298#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18294#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18295#L12 assume !(10 == main_~i~0); 18297#L12-2 assume !(0 == main_~i~0); 18412#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18410#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18408#L12 assume !(10 == main_~i~0); 18406#L12-2 assume !(0 == main_~i~0); 18404#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18402#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18400#L12 assume !(10 == main_~i~0); 18398#L12-2 assume !(0 == main_~i~0); 18396#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18394#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18392#L12 assume !(10 == main_~i~0); 18390#L12-2 assume !(0 == main_~i~0); 18388#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18386#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18384#L12 assume !(10 == main_~i~0); 18382#L12-2 assume !(0 == main_~i~0); 18380#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18378#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18376#L12 assume !(10 == main_~i~0); 18374#L12-2 assume !(0 == main_~i~0); 18372#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18370#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18368#L12 assume !(10 == main_~i~0); 18366#L12-2 assume !(0 == main_~i~0); 18364#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18362#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18360#L12 assume !(10 == main_~i~0); 18358#L12-2 assume !(0 == main_~i~0); 18347#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18355#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18354#L12 assume !(10 == main_~i~0); 18345#L12-2 assume !(0 == main_~i~0); 18346#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18414#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18413#L12 assume 10 == main_~i~0;main_~up~0 := 0; 18287#L12-2 [2020-11-29 18:50:02,690 INFO L796 eck$LassoCheckResult]: Loop: 18287#L12-2 assume !(0 == main_~i~0); 18288#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18299#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18411#L12 assume !(10 == main_~i~0); 18409#L12-2 assume !(0 == main_~i~0); 18407#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18405#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18403#L12 assume !(10 == main_~i~0); 18401#L12-2 assume !(0 == main_~i~0); 18399#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18397#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18395#L12 assume !(10 == main_~i~0); 18393#L12-2 assume !(0 == main_~i~0); 18391#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18389#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18387#L12 assume !(10 == main_~i~0); 18385#L12-2 assume !(0 == main_~i~0); 18383#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18381#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18379#L12 assume !(10 == main_~i~0); 18377#L12-2 assume !(0 == main_~i~0); 18375#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18373#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18371#L12 assume !(10 == main_~i~0); 18369#L12-2 assume !(0 == main_~i~0); 18367#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18365#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18363#L12 assume !(10 == main_~i~0); 18361#L12-2 assume !(0 == main_~i~0); 18359#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18357#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18356#L12 assume !(10 == main_~i~0); 18351#L12-2 assume !(0 == main_~i~0); 18353#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 18352#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18350#L12 assume !(10 == main_~i~0); 18344#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 18300#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18301#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18446#L12 assume !(10 == main_~i~0); 18348#L12-2 assume !(0 == main_~i~0); 18349#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18292#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18293#L12 assume !(10 == main_~i~0); 18296#L12-2 assume !(0 == main_~i~0); 18445#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18444#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18443#L12 assume !(10 == main_~i~0); 18442#L12-2 assume !(0 == main_~i~0); 18441#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18440#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18439#L12 assume !(10 == main_~i~0); 18438#L12-2 assume !(0 == main_~i~0); 18437#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18436#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18435#L12 assume !(10 == main_~i~0); 18434#L12-2 assume !(0 == main_~i~0); 18433#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18432#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18431#L12 assume !(10 == main_~i~0); 18430#L12-2 assume !(0 == main_~i~0); 18429#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18428#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18427#L12 assume !(10 == main_~i~0); 18426#L12-2 assume !(0 == main_~i~0); 18425#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18424#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18423#L12 assume !(10 == main_~i~0); 18422#L12-2 assume !(0 == main_~i~0); 18421#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18419#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18417#L12 assume !(10 == main_~i~0); 18415#L12-2 assume !(0 == main_~i~0); 18416#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 18420#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18418#L12 assume 10 == main_~i~0;main_~up~0 := 0; 18287#L12-2 [2020-11-29 18:50:02,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:02,690 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 15 times [2020-11-29 18:50:02,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:02,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991475262] [2020-11-29 18:50:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:02,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:02,700 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:02,702 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:02,702 INFO L82 PathProgramCache]: Analyzing trace with hash 289875998, now seen corresponding path program 16 times [2020-11-29 18:50:02,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:02,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672680688] [2020-11-29 18:50:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:02,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:02,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:02,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:02,719 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:02,722 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:02,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:02,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1498053540, now seen corresponding path program 8 times [2020-11-29 18:50:02,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:02,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327039962] [2020-11-29 18:50:02,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:02,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 1158 proven. 153 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:50:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327039962] [2020-11-29 18:50:02,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734834859] [2020-11-29 18:50:02,870 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 18:50:02,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 18:50:02,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 18:50:02,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 18:50:02,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:02,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1682 backedges. 1158 proven. 153 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2020-11-29 18:50:02,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 18:50:02,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 18:50:02,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460905377] [2020-11-29 18:50:03,694 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 76 [2020-11-29 18:50:03,708 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:50:03,709 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:50:03,709 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:50:03,709 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:50:03,709 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 18:50:03,709 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:03,709 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:50:03,709 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:50:03,709 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration25_Loop [2020-11-29 18:50:03,709 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:50:03,709 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:50:03,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,723 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,809 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:50:03,809 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:03,812 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:50:03,812 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:50:03,814 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 18:50:03,814 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_27=1} Honda state: {v_rep~unnamed0~0~true_27=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:03,835 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 18:50:03,835 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:03,858 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 18:50:03,858 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 18:50:03,920 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 18:50:03,921 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 18:50:03,921 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 18:50:03,921 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 18:50:03,921 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 18:50:03,921 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 18:50:03,921 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:03,922 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 18:50:03,922 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 18:50:03,922 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDown.c_Iteration25_Loop [2020-11-29 18:50:03,922 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 18:50:03,922 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 18:50:03,922 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,925 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:03,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 18:50:04,059 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 18:50:04,060 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:04,064 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:50:04,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:50:04,065 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:50:04,065 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:50:04,066 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:50:04,067 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 18:50:04,067 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 18:50:04,069 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:04,093 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 18:50:04,094 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 18:50:04,094 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 18:50:04,094 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 18:50:04,094 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 18:50:04,094 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 18:50:04,095 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 18:50:04,095 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 18:50:04,097 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 18:50:04,098 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 18:50:04,099 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/z3 Starting monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 18:50:04,102 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 18:50:04,102 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 18:50:04,102 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 18:50:04,102 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 19 Supporting invariants [] [2020-11-29 18:50:04,121 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 18:50:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:04,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 18:50:04,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 18:50:04,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 18:50:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 18:50:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2020-11-29 18:50:04,345 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 11 loop predicates [2020-11-29 18:50:04,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 160 states and 177 transitions. cyclomatic complexity: 21 Second operand 13 states. [2020-11-29 18:50:05,212 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 160 states and 177 transitions. cyclomatic complexity: 21. Second operand 13 states. Result 1253 states and 1393 transitions. Complement of second has 43 states. [2020-11-29 18:50:05,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 22 states 1 stem states 20 non-accepting loop states 1 accepting loop states [2020-11-29 18:50:05,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 18:50:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 98 transitions. [2020-11-29 18:50:05,213 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 98 transitions. Stem has 43 letters. Loop has 76 letters. [2020-11-29 18:50:05,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:05,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 98 transitions. Stem has 119 letters. Loop has 76 letters. [2020-11-29 18:50:05,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:05,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 98 transitions. Stem has 43 letters. Loop has 152 letters. [2020-11-29 18:50:05,215 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 18:50:05,215 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1253 states and 1393 transitions. [2020-11-29 18:50:05,223 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 81 [2020-11-29 18:50:05,228 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1253 states to 817 states and 911 transitions. [2020-11-29 18:50:05,228 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 74 [2020-11-29 18:50:05,228 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 78 [2020-11-29 18:50:05,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 817 states and 911 transitions. [2020-11-29 18:50:05,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:50:05,229 INFO L691 BuchiCegarLoop]: Abstraction has 817 states and 911 transitions. [2020-11-29 18:50:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states and 911 transitions. [2020-11-29 18:50:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 394. [2020-11-29 18:50:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-11-29 18:50:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 426 transitions. [2020-11-29 18:50:05,238 INFO L714 BuchiCegarLoop]: Abstraction has 394 states and 426 transitions. [2020-11-29 18:50:05,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 18:50:05,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 18:50:05,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 18:50:05,239 INFO L87 Difference]: Start difference. First operand 394 states and 426 transitions. Second operand 12 states. [2020-11-29 18:50:05,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 18:50:05,367 INFO L93 Difference]: Finished difference Result 401 states and 441 transitions. [2020-11-29 18:50:05,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 18:50:05,367 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 401 states and 441 transitions. [2020-11-29 18:50:05,369 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 83 [2020-11-29 18:50:05,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 401 states to 327 states and 367 transitions. [2020-11-29 18:50:05,370 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2020-11-29 18:50:05,370 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 57 [2020-11-29 18:50:05,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 327 states and 367 transitions. [2020-11-29 18:50:05,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 18:50:05,371 INFO L691 BuchiCegarLoop]: Abstraction has 327 states and 367 transitions. [2020-11-29 18:50:05,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states and 367 transitions. [2020-11-29 18:50:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 168. [2020-11-29 18:50:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-29 18:50:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 186 transitions. [2020-11-29 18:50:05,375 INFO L714 BuchiCegarLoop]: Abstraction has 168 states and 186 transitions. [2020-11-29 18:50:05,375 INFO L594 BuchiCegarLoop]: Abstraction has 168 states and 186 transitions. [2020-11-29 18:50:05,375 INFO L427 BuchiCegarLoop]: ======== Iteration 26============ [2020-11-29 18:50:05,376 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 168 states and 186 transitions. [2020-11-29 18:50:05,376 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 18:50:05,377 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 18:50:05,377 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 18:50:05,377 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1] [2020-11-29 18:50:05,378 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [20, 19, 19, 10, 10, 1, 1] [2020-11-29 18:50:05,378 INFO L794 eck$LassoCheckResult]: Stem: 21316#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 21317#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21329#L12 assume !(10 == main_~i~0); 21328#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 21324#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21325#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21446#L12 assume !(10 == main_~i~0); 21444#L12-2 assume !(0 == main_~i~0); 21442#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21440#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21438#L12 assume !(10 == main_~i~0); 21436#L12-2 assume !(0 == main_~i~0); 21434#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21432#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21430#L12 assume !(10 == main_~i~0); 21428#L12-2 assume !(0 == main_~i~0); 21426#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21424#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21422#L12 assume !(10 == main_~i~0); 21420#L12-2 assume !(0 == main_~i~0); 21418#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21416#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21414#L12 assume !(10 == main_~i~0); 21412#L12-2 assume !(0 == main_~i~0); 21410#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21408#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21406#L12 assume !(10 == main_~i~0); 21404#L12-2 assume !(0 == main_~i~0); 21402#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21400#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21398#L12 assume !(10 == main_~i~0); 21396#L12-2 assume !(0 == main_~i~0); 21394#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21392#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21390#L12 assume !(10 == main_~i~0); 21388#L12-2 assume !(0 == main_~i~0); 21379#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21385#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21384#L12 assume !(10 == main_~i~0); 21377#L12-2 assume !(0 == main_~i~0); 21378#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21448#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21447#L12 assume 10 == main_~i~0;main_~up~0 := 0; 21313#L12-2 [2020-11-29 18:50:05,378 INFO L796 eck$LassoCheckResult]: Loop: 21313#L12-2 assume !(0 == main_~i~0); 21314#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21320#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21321#L12 assume !(10 == main_~i~0); 21323#L12-2 assume !(0 == main_~i~0); 21445#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21443#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21441#L12 assume !(10 == main_~i~0); 21439#L12-2 assume !(0 == main_~i~0); 21437#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21435#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21433#L12 assume !(10 == main_~i~0); 21431#L12-2 assume !(0 == main_~i~0); 21429#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21427#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21425#L12 assume !(10 == main_~i~0); 21423#L12-2 assume !(0 == main_~i~0); 21421#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21419#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21417#L12 assume !(10 == main_~i~0); 21415#L12-2 assume !(0 == main_~i~0); 21413#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21411#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21409#L12 assume !(10 == main_~i~0); 21407#L12-2 assume !(0 == main_~i~0); 21405#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21403#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21401#L12 assume !(10 == main_~i~0); 21399#L12-2 assume !(0 == main_~i~0); 21397#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21395#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21393#L12 assume !(10 == main_~i~0); 21391#L12-2 assume !(0 == main_~i~0); 21389#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21387#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21386#L12 assume !(10 == main_~i~0); 21381#L12-2 assume !(0 == main_~i~0); 21383#L15-1 assume !(1 == main_~up~0);main_~i~0 := main_~i~0 - 1; 21382#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21380#L12 assume !(10 == main_~i~0); 21374#L12-2 assume 0 == main_~i~0;main_~up~0 := 1; 21326#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21327#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21480#L12 assume !(10 == main_~i~0); 21375#L12-2 assume !(0 == main_~i~0); 21376#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21318#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21319#L12 assume !(10 == main_~i~0); 21322#L12-2 assume !(0 == main_~i~0); 21479#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21478#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21477#L12 assume !(10 == main_~i~0); 21476#L12-2 assume !(0 == main_~i~0); 21475#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21474#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21473#L12 assume !(10 == main_~i~0); 21472#L12-2 assume !(0 == main_~i~0); 21471#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21470#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21469#L12 assume !(10 == main_~i~0); 21468#L12-2 assume !(0 == main_~i~0); 21467#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21466#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21465#L12 assume !(10 == main_~i~0); 21464#L12-2 assume !(0 == main_~i~0); 21463#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21462#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21461#L12 assume !(10 == main_~i~0); 21460#L12-2 assume !(0 == main_~i~0); 21459#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21458#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21457#L12 assume !(10 == main_~i~0); 21456#L12-2 assume !(0 == main_~i~0); 21455#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21454#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21452#L12 assume !(10 == main_~i~0); 21449#L12-2 assume !(0 == main_~i~0); 21450#L15-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 21453#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21451#L12 assume 10 == main_~i~0;main_~up~0 := 0; 21313#L12-2 [2020-11-29 18:50:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:05,379 INFO L82 PathProgramCache]: Analyzing trace with hash 180435263, now seen corresponding path program 16 times [2020-11-29 18:50:05,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:05,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005776621] [2020-11-29 18:50:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:05,384 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:05,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:05,390 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:05,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:05,390 INFO L82 PathProgramCache]: Analyzing trace with hash -312487543, now seen corresponding path program 17 times [2020-11-29 18:50:05,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:05,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711384972] [2020-11-29 18:50:05,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:05,398 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:05,405 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:05,407 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:05,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 18:50:05,408 INFO L82 PathProgramCache]: Analyzing trace with hash 799661767, now seen corresponding path program 9 times [2020-11-29 18:50:05,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 18:50:05,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846292982] [2020-11-29 18:50:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 18:50:05,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:05,419 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 18:50:05,430 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 18:50:05,433 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 18:50:06,095 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 82 [2020-11-29 18:50:06,363 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 43 [2020-11-29 18:50:06,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 06:50:06 BoogieIcfgContainer [2020-11-29 18:50:06,418 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 18:50:06,418 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 18:50:06,418 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 18:50:06,419 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 18:50:06,419 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:49:43" (3/4) ... [2020-11-29 18:50:06,421 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 18:50:06,482 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_a2088739-51b1-40d7-9d1a-b4ae560141eb/bin/uautomizer/witness.graphml [2020-11-29 18:50:06,482 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 18:50:06,483 INFO L168 Benchmark]: Toolchain (without parser) took 23512.14 ms. Allocated memory was 121.6 MB in the beginning and 318.8 MB in the end (delta: 197.1 MB). Free memory was 87.5 MB in the beginning and 173.9 MB in the end (delta: -86.4 MB). Peak memory consumption was 110.7 MB. Max. memory is 16.1 GB. [2020-11-29 18:50:06,484 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory was 32.2 MB in the beginning and 32.1 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:50:06,484 INFO L168 Benchmark]: CACSL2BoogieTranslator took 192.53 ms. Allocated memory is still 121.6 MB. Free memory was 87.5 MB in the beginning and 97.7 MB in the end (delta: -10.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. [2020-11-29 18:50:06,484 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.48 ms. Allocated memory is still 121.6 MB. Free memory was 97.7 MB in the beginning and 96.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:50:06,485 INFO L168 Benchmark]: Boogie Preprocessor took 16.74 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 95.8 MB in the end (delta: 667.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 18:50:06,485 INFO L168 Benchmark]: RCFGBuilder took 228.22 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 87.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2020-11-29 18:50:06,486 INFO L168 Benchmark]: BuchiAutomizer took 22947.87 ms. Allocated memory was 121.6 MB in the beginning and 318.8 MB in the end (delta: 197.1 MB). Free memory was 86.6 MB in the beginning and 178.1 MB in the end (delta: -91.5 MB). Peak memory consumption was 185.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:50:06,486 INFO L168 Benchmark]: Witness Printer took 64.17 ms. Allocated memory is still 318.8 MB. Free memory was 178.1 MB in the beginning and 173.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 18:50:06,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 73.4 MB. Free memory was 32.2 MB in the beginning and 32.1 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 192.53 ms. Allocated memory is still 121.6 MB. Free memory was 87.5 MB in the beginning and 97.7 MB in the end (delta: -10.2 MB). Peak memory consumption was 9.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.48 ms. Allocated memory is still 121.6 MB. Free memory was 97.7 MB in the beginning and 96.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.74 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 95.8 MB in the end (delta: 667.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 228.22 ms. Allocated memory is still 121.6 MB. Free memory was 95.8 MB in the beginning and 87.2 MB in the end (delta: 8.5 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 22947.87 ms. Allocated memory was 121.6 MB in the beginning and 318.8 MB in the end (delta: 197.1 MB). Free memory was 86.6 MB in the beginning and 178.1 MB in the end (delta: -91.5 MB). Peak memory consumption was 185.2 MB. Max. memory is 16.1 GB. * Witness Printer took 64.17 ms. Allocated memory is still 318.8 MB. Free memory was 178.1 MB in the beginning and 173.9 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. 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 36 terminating modules (22 trivial, 13 deterministic, 1 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 17 and consists of 5 locations. One deterministic module has affine ranking function -1 * i and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 17 and consists of 5 locations. One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 13 and consists of 10 locations. One deterministic module has affine ranking function -1 * i + 7 and consists of 12 locations. One deterministic module has affine ranking function -2 * i + 15 and consists of 14 locations. One deterministic module has affine ranking function -1 * i + 8 and consists of 16 locations. One deterministic module has affine ranking function -2 * i + 17 and consists of 18 locations. One deterministic module has affine ranking function -1 * i + 9 and consists of 20 locations. One deterministic module has affine ranking function -2 * i + 19 and consists of 22 locations. One nondeterministic module has affine ranking function i and consists of 4 locations. 22 modules have a trivial ranking function, the largest among these consists of 12 locations. The remainder module has 168 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 22.8s and 26 iterations. TraceHistogramMax:20. Analysis of lassos took 15.3s. Construction of modules took 2.3s. Büchi inclusion checks took 4.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 35. Automata minimization 0.1s AutomataMinimizationTime, 36 MinimizatonAttempts, 2596 StatesRemovedByMinimization, 35 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 168 states and ocurred in iteration 25. Nontrivial modules had stage [13, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1197/3416 HoareTripleCheckerStatistics: 270 SDtfs, 849 SDslu, 9 SDs, 0 SdLazy, 2288 SolverSat, 253 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time LassoAnalysisResults: nont1 unkn0 SFLI3 SFLT3 conc0 concLT9 SILN0 SILU0 SILI8 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital19 mio100 ax164 hnf95 lsp41 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq183 hnf93 smp90 dnf136 smp96 tf108 neg93 sie114 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 17ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 14 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.5s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 15]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {up=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@69a644f2=0, \result=0, i=10} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 11]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int up; [L8] i = __VERIFIER_nondet_int() [L9] up = 0 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND TRUE i == 0 [L16] up = 1 [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND TRUE i == 10 [L13] up = 0 Loop: [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND FALSE !(up == 1) [L21] i = i-1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND TRUE i == 0 [L16] up = 1 [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND FALSE !(i == 10) [L15] COND FALSE !(i == 0) [L18] COND TRUE up == 1 [L19] i = i+1 [L11] COND TRUE 0 <= i && i <= 10 [L12] COND TRUE i == 10 [L13] up = 0 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...