./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 2b329fcd1c2ada34efa1c491c6d8d75d6e8a1856 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 22:55:50,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:55:50,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:55:50,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:55:50,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:55:50,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:55:50,499 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:55:50,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:55:50,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:55:50,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:55:50,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:55:50,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:55:50,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:55:50,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:55:50,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:55:50,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:55:50,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:55:50,529 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:55:50,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:55:50,541 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:55:50,543 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:55:50,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:55:50,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:55:50,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:55:50,555 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:55:50,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:55:50,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:55:50,558 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:55:50,559 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:55:50,560 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:55:50,561 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:55:50,562 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:55:50,564 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:55:50,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:55:50,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:55:50,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:55:50,569 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:55:50,569 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:55:50,569 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:55:50,570 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:55:50,571 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:55:50,572 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-11-29 22:55:50,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:55:50,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:55:50,610 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:55:50,610 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:55:50,610 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:55:50,610 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-11-29 22:55:50,610 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-11-29 22:55:50,611 INFO L138 SettingsManager]: * Use old map elimination=false [2020-11-29 22:55:50,611 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-11-29 22:55:50,611 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-11-29 22:55:50,611 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-11-29 22:55:50,611 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:55:50,611 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-29 22:55:50,612 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:55:50,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:55:50,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-11-29 22:55:50,612 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-11-29 22:55:50,612 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-11-29 22:55:50,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:55:50,613 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-11-29 22:55:50,613 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:55:50,613 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-11-29 22:55:50,613 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:55:50,613 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:55:50,613 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-11-29 22:55:50,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:55:50,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:55:50,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:55:50,614 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-11-29 22:55:50,615 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-11-29 22:55:50,620 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b329fcd1c2ada34efa1c491c6d8d75d6e8a1856 [2020-11-29 22:55:50,896 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:55:50,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:55:50,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:55:50,943 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:55:50,945 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:55:50,946 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.c [2020-11-29 22:55:51,044 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/data/e1f0d1f78/70358202829f4c888c37b38d18cacdd4/FLAG596c3ff63 [2020-11-29 22:55:51,550 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:55:51,551 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/sv-benchmarks/c/termination-restricted-15/UpAndDownIneq.c [2020-11-29 22:55:51,557 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/data/e1f0d1f78/70358202829f4c888c37b38d18cacdd4/FLAG596c3ff63 [2020-11-29 22:55:51,910 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/data/e1f0d1f78/70358202829f4c888c37b38d18cacdd4 [2020-11-29 22:55:51,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:55:51,915 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:55:51,917 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:55:51,917 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:55:51,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:55:51,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:55:51" (1/1) ... [2020-11-29 22:55:51,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3166952b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:51, skipping insertion in model container [2020-11-29 22:55:51,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:55:51" (1/1) ... [2020-11-29 22:55:51,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:55:51,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:55:52,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:55:52,103 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:55:52,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:55:52,145 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:55:52,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52 WrapperNode [2020-11-29 22:55:52,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:55:52,150 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:55:52,151 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:55:52,151 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:55:52,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,180 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:55:52,181 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:55:52,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:55:52,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:55:52,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,191 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,196 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... [2020-11-29 22:55:52,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:55:52,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:55:52,199 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:55:52,199 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:55:52,200 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:52,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:55:52,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:55:52,434 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:55:52,434 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-11-29 22:55:52,436 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:55:52 BoogieIcfgContainer [2020-11-29 22:55:52,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:55:52,437 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-11-29 22:55:52,437 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-11-29 22:55:52,440 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-11-29 22:55:52,441 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:55:52,441 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.11 10:55:51" (1/3) ... [2020-11-29 22:55:52,442 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7ca44800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:55:52, skipping insertion in model container [2020-11-29 22:55:52,442 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:55:52,443 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:55:52" (2/3) ... [2020-11-29 22:55:52,443 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7ca44800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.11 10:55:52, skipping insertion in model container [2020-11-29 22:55:52,443 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-11-29 22:55:52,443 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:55:52" (3/3) ... [2020-11-29 22:55:52,445 INFO L373 chiAutomizerObserver]: Analyzing ICFG UpAndDownIneq.c [2020-11-29 22:55:52,522 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-11-29 22:55:52,523 INFO L360 BuchiCegarLoop]: Hoare is false [2020-11-29 22:55:52,523 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-11-29 22:55:52,523 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:55:52,523 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:55:52,523 INFO L364 BuchiCegarLoop]: Difference is false [2020-11-29 22:55:52,523 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:55:52,524 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-11-29 22:55:52,538 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-29 22:55:52,559 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 22:55:52,559 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:52,559 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:52,566 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:55:52,566 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:52,566 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-11-29 22:55:52,566 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states. [2020-11-29 22:55:52,568 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2020-11-29 22:55:52,568 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:52,568 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:52,569 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:55:52,569 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:52,576 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 22:55:52,578 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-1true assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6#L12true assume main_~i~0 >= 10;main_~up~0 := 0; 3#L12-2true assume main_~i~0 <= 0;main_~up~0 := 1; 9#L15-1true assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5#L18-1true [2020-11-29 22:55:52,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:52,595 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-11-29 22:55:52,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:52,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204867117] [2020-11-29 22:55:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:52,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:52,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:52,712 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:52,730 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:52,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1234538, now seen corresponding path program 1 times [2020-11-29 22:55:52,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:52,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177158570] [2020-11-29 22:55:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:52,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:52,826 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 22:55:52,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177158570] [2020-11-29 22:55:52,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:55:52,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:55:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716695233] [2020-11-29 22:55:52,840 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:55:52,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:55:52,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:55:52,864 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2020-11-29 22:55:53,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:53,030 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2020-11-29 22:55:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:55:53,033 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 21 transitions. [2020-11-29 22:55:53,034 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 22:55:53,039 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 9 states and 13 transitions. [2020-11-29 22:55:53,041 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2020-11-29 22:55:53,041 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2020-11-29 22:55:53,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 13 transitions. [2020-11-29 22:55:53,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-11-29 22:55:53,043 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-11-29 22:55:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 13 transitions. [2020-11-29 22:55:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 22:55:53,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 22:55:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 13 transitions. [2020-11-29 22:55:53,075 INFO L714 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-11-29 22:55:53,075 INFO L594 BuchiCegarLoop]: Abstraction has 9 states and 13 transitions. [2020-11-29 22:55:53,075 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-11-29 22:55:53,075 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 13 transitions. [2020-11-29 22:55:53,077 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2020-11-29 22:55:53,077 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:53,077 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:53,078 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-11-29 22:55:53,078 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:53,078 INFO L794 eck$LassoCheckResult]: Stem: 37#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 38#L18-1 [2020-11-29 22:55:53,079 INFO L796 eck$LassoCheckResult]: Loop: 38#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 43#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 35#L12-2 assume !(main_~i~0 <= 0); 36#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 38#L18-1 [2020-11-29 22:55:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2020-11-29 22:55:53,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:53,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114314731] [2020-11-29 22:55:53,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:53,085 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:53,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:53,088 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:53,089 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:53,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1234602, now seen corresponding path program 1 times [2020-11-29 22:55:53,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:53,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741230636] [2020-11-29 22:55:53,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:53,103 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:53,110 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:53,114 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:53,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:53,116 INFO L82 PathProgramCache]: Analyzing trace with hash 29863753, now seen corresponding path program 1 times [2020-11-29 22:55:53,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:53,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219981334] [2020-11-29 22:55:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:53,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:53,135 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:53,141 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:53,143 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:53,241 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:53,242 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:53,242 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:53,242 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:53,242 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:53,243 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:53,243 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:53,243 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:53,243 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration2_Loop [2020-11-29 22:55:53,243 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:53,243 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:53,265 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,321 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,519 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:53,520 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:53,544 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:53,544 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:53,568 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:53,568 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: [] Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:53,610 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:53,610 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:53,615 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:53,615 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:53,639 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:53,639 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:53,644 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:53,645 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:53,698 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:53,698 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:53,756 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:53,756 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:53,763 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:53,791 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:53,791 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:53,791 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:53,791 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:53,791 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:53,791 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:53,792 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:53,792 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:53,792 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration2_Loop [2020-11-29 22:55:53,792 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:53,792 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:53,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,798 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,807 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:53,905 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:53,910 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:53,921 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 22:55:53,925 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:53,925 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:53,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:53,926 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:53,937 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:53,939 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:55:53,955 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:53,990 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 22:55:53,996 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:53,996 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:53,996 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:53,997 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:54,001 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:54,002 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:55:54,011 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,060 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 22:55:54,062 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:54,062 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:54,063 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:54,063 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:54,063 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:54,066 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:54,066 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:55:54,069 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:54,107 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:54,108 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:54,109 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:54,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:54,109 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:54,111 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:54,111 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:55:54,114 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:54,119 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:54,119 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,148 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:54,149 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:54,149 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:54,150 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 22:55:54,174 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:54,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:54,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:54,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:54,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:54,244 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 22:55:54,248 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 22:55:54,249 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 5 Second operand 4 states. [2020-11-29 22:55:54,327 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 13 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 24 states and 36 transitions. Complement of second has 7 states. [2020-11-29 22:55:54,327 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 22:55:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2020-11-29 22:55:54,330 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 1 letters. Loop has 4 letters. [2020-11-29 22:55:54,331 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:54,331 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 5 letters. Loop has 4 letters. [2020-11-29 22:55:54,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:54,332 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 1 letters. Loop has 8 letters. [2020-11-29 22:55:54,332 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:54,332 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 24 states and 36 transitions. [2020-11-29 22:55:54,335 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-11-29 22:55:54,336 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 24 states to 24 states and 36 transitions. [2020-11-29 22:55:54,337 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-11-29 22:55:54,337 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2020-11-29 22:55:54,337 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 36 transitions. [2020-11-29 22:55:54,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:54,337 INFO L691 BuchiCegarLoop]: Abstraction has 24 states and 36 transitions. [2020-11-29 22:55:54,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 36 transitions. [2020-11-29 22:55:54,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-11-29 22:55:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 22:55:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2020-11-29 22:55:54,342 INFO L714 BuchiCegarLoop]: Abstraction has 23 states and 34 transitions. [2020-11-29 22:55:54,342 INFO L594 BuchiCegarLoop]: Abstraction has 23 states and 34 transitions. [2020-11-29 22:55:54,342 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-11-29 22:55:54,342 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 23 states and 34 transitions. [2020-11-29 22:55:54,343 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 12 [2020-11-29 22:55:54,343 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:54,344 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:54,344 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 22:55:54,344 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:54,344 INFO L794 eck$LassoCheckResult]: Stem: 111#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 112#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 122#L12 [2020-11-29 22:55:54,345 INFO L796 eck$LassoCheckResult]: Loop: 122#L12 assume !(main_~i~0 >= 10); 125#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 128#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 126#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 122#L12 [2020-11-29 22:55:54,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:54,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-11-29 22:55:54,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:54,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363075101] [2020-11-29 22:55:54,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,350 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,354 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,355 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:54,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:54,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1389492, now seen corresponding path program 1 times [2020-11-29 22:55:54,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:54,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010896863] [2020-11-29 22:55:54,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:54,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:54,376 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 22:55:54,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010896863] [2020-11-29 22:55:54,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:55:54,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:55:54,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570969093] [2020-11-29 22:55:54,377 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:55:54,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:54,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:55:54,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:55:54,378 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. cyclomatic complexity: 14 Second operand 3 states. [2020-11-29 22:55:54,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:54,389 INFO L93 Difference]: Finished difference Result 29 states and 41 transitions. [2020-11-29 22:55:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:55:54,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 41 transitions. [2020-11-29 22:55:54,392 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-11-29 22:55:54,393 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 28 states and 40 transitions. [2020-11-29 22:55:54,394 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-11-29 22:55:54,394 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-11-29 22:55:54,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 40 transitions. [2020-11-29 22:55:54,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:54,394 INFO L691 BuchiCegarLoop]: Abstraction has 28 states and 40 transitions. [2020-11-29 22:55:54,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states and 40 transitions. [2020-11-29 22:55:54,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-11-29 22:55:54,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 22:55:54,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2020-11-29 22:55:54,398 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-11-29 22:55:54,398 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 39 transitions. [2020-11-29 22:55:54,398 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-11-29 22:55:54,398 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 39 transitions. [2020-11-29 22:55:54,399 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-11-29 22:55:54,400 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:54,400 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:54,400 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-11-29 22:55:54,400 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:54,400 INFO L794 eck$LassoCheckResult]: Stem: 169#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; 170#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 178#L12 [2020-11-29 22:55:54,401 INFO L796 eck$LassoCheckResult]: Loop: 178#L12 assume !(main_~i~0 >= 10); 185#L12-2 assume !(main_~i~0 <= 0); 189#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 187#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 178#L12 [2020-11-29 22:55:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:54,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 2 times [2020-11-29 22:55:54,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:54,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823154216] [2020-11-29 22:55:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,406 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,410 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1391414, now seen corresponding path program 1 times [2020-11-29 22:55:54,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:54,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566081554] [2020-11-29 22:55:54,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,417 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,420 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,421 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:54,422 INFO L82 PathProgramCache]: Analyzing trace with hash 925835935, now seen corresponding path program 1 times [2020-11-29 22:55:54,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:54,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942025599] [2020-11-29 22:55:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:54,433 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:54,435 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:54,500 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:54,501 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:54,501 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:54,501 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:54,501 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:54,501 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,501 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:54,501 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:54,501 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration4_Loop [2020-11-29 22:55:54,501 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:54,502 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:54,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,517 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,592 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:54,593 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:54,602 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:54,602 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 22:55:54,607 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:54,607 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:54,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:54,650 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,654 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:54,654 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:54,689 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:54,690 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:54,696 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:54,696 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:54,723 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:54,723 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:54,751 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:54,751 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:54,790 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:54,792 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:54,792 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:54,792 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:54,792 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:54,792 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:54,792 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,792 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:54,792 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:54,792 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration4_Loop [2020-11-29 22:55:54,793 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:54,793 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:54,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,822 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:54,913 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:54,913 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:54,921 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 22:55:54,930 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:54,930 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:54,930 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:54,930 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:54,933 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:54,934 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 22:55:54,941 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:54,982 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 22:55:54,984 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:54,984 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:54,984 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:54,984 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:54,985 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:54,985 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:54,985 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:54,989 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:55,032 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 22:55:55,033 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:55,034 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:55,034 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:55,034 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:55,045 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:55,045 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:55:55,051 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:55,130 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 22:55:55,132 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:55,132 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:55,132 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:55,132 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:55,132 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:55,134 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:55,134 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,138 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:55,143 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:55,143 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,152 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:55,155 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:55,156 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:55,156 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 22:55:55,192 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:55,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:55,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:55,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:55,317 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 22:55:55,317 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 22:55:55,318 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 15 Second operand 5 states. [2020-11-29 22:55:55,362 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 27 states and 39 transitions. cyclomatic complexity: 15. Second operand 5 states. Result 45 states and 68 transitions. Complement of second has 7 states. [2020-11-29 22:55:55,363 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 22:55:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 22:55:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-11-29 22:55:55,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 2 letters. Loop has 4 letters. [2020-11-29 22:55:55,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:55,364 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 6 letters. Loop has 4 letters. [2020-11-29 22:55:55,364 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:55,365 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 2 letters. Loop has 8 letters. [2020-11-29 22:55:55,365 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:55,365 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 68 transitions. [2020-11-29 22:55:55,369 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 22:55:55,370 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 37 states and 55 transitions. [2020-11-29 22:55:55,370 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2020-11-29 22:55:55,371 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-11-29 22:55:55,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 55 transitions. [2020-11-29 22:55:55,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:55,371 INFO L691 BuchiCegarLoop]: Abstraction has 37 states and 55 transitions. [2020-11-29 22:55:55,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 55 transitions. [2020-11-29 22:55:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-11-29 22:55:55,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-29 22:55:55,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 44 transitions. [2020-11-29 22:55:55,376 INFO L714 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2020-11-29 22:55:55,376 INFO L594 BuchiCegarLoop]: Abstraction has 30 states and 44 transitions. [2020-11-29 22:55:55,376 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-11-29 22:55:55,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 44 transitions. [2020-11-29 22:55:55,378 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2020-11-29 22:55:55,378 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:55,378 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:55,378 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-11-29 22:55:55,378 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:55,379 INFO L794 eck$LassoCheckResult]: Stem: 284#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; 285#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 295#L12 assume !(main_~i~0 >= 10); 291#L12-2 [2020-11-29 22:55:55,379 INFO L796 eck$LassoCheckResult]: Loop: 291#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 294#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 286#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 287#L12 assume !(main_~i~0 >= 10); 291#L12-2 [2020-11-29 22:55:55,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:55,380 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-11-29 22:55:55,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:55,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595420858] [2020-11-29 22:55:55,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:55,385 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:55,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:55,388 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:55,390 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:55,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1513900, now seen corresponding path program 1 times [2020-11-29 22:55:55,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:55,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889810880] [2020-11-29 22:55:55,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:55,396 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:55,400 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:55,402 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:55,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918576, now seen corresponding path program 1 times [2020-11-29 22:55:55,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:55,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460841032] [2020-11-29 22:55:55,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:55,409 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:55,414 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:55,416 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:55,453 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:55,453 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:55,453 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:55,453 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:55,454 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:55,454 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,454 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:55,454 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:55,454 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration5_Loop [2020-11-29 22:55:55,454 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:55,454 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:55,456 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,461 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,473 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,480 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,543 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:55,543 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:55,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:55,548 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 22:55:55,551 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:55,552 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:55,589 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:55,589 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 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:55:55,630 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:55,630 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,660 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:55,661 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:55,661 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:55,661 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:55,661 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:55,661 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:55,661 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,661 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:55,661 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:55,661 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration5_Loop [2020-11-29 22:55:55,661 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:55,662 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:55,663 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,684 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,693 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,696 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:55,762 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:55,762 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:55,769 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 22:55:55,771 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:55,771 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:55,771 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:55,771 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:55,771 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:55,773 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:55,773 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,775 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:55,779 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:55,780 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:55,784 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:55,784 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:55,784 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:55,785 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -2*ULTIMATE.start_main_~i~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:55,820 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:55,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:55,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:55,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:55,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:55,913 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 22:55:55,913 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 30 states and 44 transitions. cyclomatic complexity: 17 Second operand 4 states. [2020-11-29 22:55:55,967 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 30 states and 44 transitions. cyclomatic complexity: 17. Second operand 4 states. Result 76 states and 108 transitions. Complement of second has 7 states. [2020-11-29 22:55:55,971 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 22:55:55,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 17 transitions. [2020-11-29 22:55:55,972 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 3 letters. Loop has 4 letters. [2020-11-29 22:55:55,972 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:55,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 22:55:55,973 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:55,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 17 transitions. Stem has 3 letters. Loop has 8 letters. [2020-11-29 22:55:55,973 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:55,973 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 76 states and 108 transitions. [2020-11-29 22:55:55,975 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 26 [2020-11-29 22:55:55,977 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 76 states to 68 states and 98 transitions. [2020-11-29 22:55:55,977 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-29 22:55:55,977 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2020-11-29 22:55:55,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 98 transitions. [2020-11-29 22:55:55,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:55,978 INFO L691 BuchiCegarLoop]: Abstraction has 68 states and 98 transitions. [2020-11-29 22:55:55,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states and 98 transitions. [2020-11-29 22:55:55,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2020-11-29 22:55:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 22:55:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 84 transitions. [2020-11-29 22:55:55,987 INFO L714 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2020-11-29 22:55:55,987 INFO L594 BuchiCegarLoop]: Abstraction has 56 states and 84 transitions. [2020-11-29 22:55:55,987 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-11-29 22:55:55,988 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 56 states and 84 transitions. [2020-11-29 22:55:55,991 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-11-29 22:55:55,991 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:55,992 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:55,992 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2020-11-29 22:55:55,992 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:55,993 INFO L794 eck$LassoCheckResult]: Stem: 436#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; 437#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 449#L12 assume !(main_~i~0 >= 10); 452#L12-2 assume !(main_~i~0 <= 0); 433#L15-1 [2020-11-29 22:55:55,993 INFO L796 eck$LassoCheckResult]: Loop: 433#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 438#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 439#L12 assume !(main_~i~0 >= 10); 432#L12-2 assume !(main_~i~0 <= 0); 433#L15-1 [2020-11-29 22:55:55,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:55,993 INFO L82 PathProgramCache]: Analyzing trace with hash 963408, now seen corresponding path program 1 times [2020-11-29 22:55:55,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:55,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319303352] [2020-11-29 22:55:55,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:56,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:56,014 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:56,021 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:56,023 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:56,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:56,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1678392, now seen corresponding path program 1 times [2020-11-29 22:55:56,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:56,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879526179] [2020-11-29 22:55:56,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:56,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:56,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:56,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:56,043 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:56,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:56,044 INFO L82 PathProgramCache]: Analyzing trace with hash 670044167, now seen corresponding path program 1 times [2020-11-29 22:55:56,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:56,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297678767] [2020-11-29 22:55:56,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:56,071 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 22:55:56,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297678767] [2020-11-29 22:55:56,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:55:56,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:55:56,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249399403] [2020-11-29 22:55:56,108 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:56,108 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:56,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:56,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:56,108 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:56,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:56,108 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:56,108 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:56,108 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration6_Loop [2020-11-29 22:55:56,108 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:56,109 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:56,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,129 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,261 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:56,261 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:56,270 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:56,270 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:56,314 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:56,314 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:56,423 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:56,424 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:56,424 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:56,424 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:56,425 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:56,425 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:56,425 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:56,425 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:56,425 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:56,425 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration6_Loop [2020-11-29 22:55:56,425 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:56,425 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:56,426 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,451 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,454 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,545 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:56,545 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:56,554 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 22:55:56,556 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:56,556 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:56,557 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:56,557 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:56,557 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:56,559 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:56,559 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:56,562 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:56,567 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:56,567 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:56,569 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:56,569 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:56,569 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:56,569 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 22:55:56,591 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:56,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:56,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:56,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:56,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:56,669 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 22:55:56,669 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 35 Second operand 4 states. [2020-11-29 22:55:56,757 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 56 states and 84 transitions. cyclomatic complexity: 35. Second operand 4 states. Result 155 states and 227 transitions. Complement of second has 7 states. [2020-11-29 22:55:56,758 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 22:55:56,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2020-11-29 22:55:56,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 4 letters. [2020-11-29 22:55:56,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:56,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-29 22:55:56,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:56,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 8 letters. [2020-11-29 22:55:56,760 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:56,760 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 155 states and 227 transitions. [2020-11-29 22:55:56,763 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 43 [2020-11-29 22:55:56,766 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 155 states to 151 states and 219 transitions. [2020-11-29 22:55:56,766 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2020-11-29 22:55:56,766 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 78 [2020-11-29 22:55:56,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 219 transitions. [2020-11-29 22:55:56,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:56,767 INFO L691 BuchiCegarLoop]: Abstraction has 151 states and 219 transitions. [2020-11-29 22:55:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states and 219 transitions. [2020-11-29 22:55:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 125. [2020-11-29 22:55:56,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-29 22:55:56,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 189 transitions. [2020-11-29 22:55:56,785 INFO L714 BuchiCegarLoop]: Abstraction has 125 states and 189 transitions. [2020-11-29 22:55:56,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:56,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:55:56,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:55:56,786 INFO L87 Difference]: Start difference. First operand 125 states and 189 transitions. Second operand 3 states. [2020-11-29 22:55:56,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:56,800 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2020-11-29 22:55:56,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:55:56,802 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 129 transitions. [2020-11-29 22:55:56,804 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 22 [2020-11-29 22:55:56,808 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 83 states and 115 transitions. [2020-11-29 22:55:56,808 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 39 [2020-11-29 22:55:56,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2020-11-29 22:55:56,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 115 transitions. [2020-11-29 22:55:56,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:56,809 INFO L691 BuchiCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-11-29 22:55:56,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 115 transitions. [2020-11-29 22:55:56,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2020-11-29 22:55:56,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 22:55:56,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 110 transitions. [2020-11-29 22:55:56,819 INFO L714 BuchiCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-11-29 22:55:56,820 INFO L594 BuchiCegarLoop]: Abstraction has 78 states and 110 transitions. [2020-11-29 22:55:56,821 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-11-29 22:55:56,821 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 78 states and 110 transitions. [2020-11-29 22:55:56,822 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 21 [2020-11-29 22:55:56,822 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:56,822 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:56,822 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-11-29 22:55:56,823 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:56,823 INFO L794 eck$LassoCheckResult]: Stem: 919#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; 920#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 972#L12 assume !(main_~i~0 >= 10); 970#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 965#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 962#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 957#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 915#L12-2 [2020-11-29 22:55:56,823 INFO L796 eck$LassoCheckResult]: Loop: 915#L12-2 assume !(main_~i~0 <= 0); 916#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 921#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 922#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 915#L12-2 [2020-11-29 22:55:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1363918578, now seen corresponding path program 1 times [2020-11-29 22:55:56,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:56,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169726164] [2020-11-29 22:55:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:56,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:56,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:56,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169726164] [2020-11-29 22:55:56,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:55:56,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:55:56,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086920383] [2020-11-29 22:55:56,865 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:55:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1575402, now seen corresponding path program 2 times [2020-11-29 22:55:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:56,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411525165] [2020-11-29 22:55:56,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:56,870 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:56,873 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:56,874 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:56,909 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:56,909 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:56,909 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:56,909 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:56,909 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:56,909 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:56,909 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:56,909 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:56,909 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration7_Loop [2020-11-29 22:55:56,909 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:56,909 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:56,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:56,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,006 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:57,007 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,022 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,027 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:57,027 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,061 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,061 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:57,063 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:57,063 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,086 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,086 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:57,089 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:57,089 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,112 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,137 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:57,137 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:57,259 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:57,261 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:57,261 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:57,261 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:57,261 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:57,261 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:57,261 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,262 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:57,262 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:57,262 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration7_Loop [2020-11-29 22:55:57,262 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:57,262 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:57,263 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,286 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,292 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,376 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:57,376 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,384 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 22:55:57,385 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:57,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:57,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:57,386 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:57,388 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:57,388 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:55:57,391 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,414 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 22:55:57,416 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:57,416 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:57,416 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:57,416 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:57,416 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:57,417 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:57,418 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:55:57,424 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,447 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 22:55:57,448 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:57,448 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:57,448 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:57,448 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:57,451 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:57,451 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:55:57,467 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,505 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 22:55:57,507 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:57,507 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:57,507 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:57,507 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:57,507 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:57,508 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:57,509 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 22:55:57,511 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:57,517 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:57,518 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:57,524 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:57,525 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:57,525 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:57,525 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 40 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,561 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:57,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:57,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:57,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:57,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:57,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:57,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:57,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:57,619 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 22:55:57,620 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 22:55:57,620 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 78 states and 110 transitions. cyclomatic complexity: 43 Second operand 4 states. [2020-11-29 22:55:57,660 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 78 states and 110 transitions. cyclomatic complexity: 43. Second operand 4 states. Result 148 states and 199 transitions. Complement of second has 7 states. [2020-11-29 22:55:57,665 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 22:55:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2020-11-29 22:55:57,665 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 4 letters. [2020-11-29 22:55:57,665 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:57,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 11 letters. Loop has 4 letters. [2020-11-29 22:55:57,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:57,666 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 8 letters. [2020-11-29 22:55:57,666 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:57,666 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 199 transitions. [2020-11-29 22:55:57,668 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2020-11-29 22:55:57,670 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 121 states and 162 transitions. [2020-11-29 22:55:57,670 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2020-11-29 22:55:57,671 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-11-29 22:55:57,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 121 states and 162 transitions. [2020-11-29 22:55:57,671 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:57,671 INFO L691 BuchiCegarLoop]: Abstraction has 121 states and 162 transitions. [2020-11-29 22:55:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states and 162 transitions. [2020-11-29 22:55:57,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 101. [2020-11-29 22:55:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-29 22:55:57,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2020-11-29 22:55:57,683 INFO L714 BuchiCegarLoop]: Abstraction has 101 states and 140 transitions. [2020-11-29 22:55:57,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:57,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:55:57,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:55:57,684 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand 4 states. [2020-11-29 22:55:57,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:57,710 INFO L93 Difference]: Finished difference Result 135 states and 179 transitions. [2020-11-29 22:55:57,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:55:57,711 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 135 states and 179 transitions. [2020-11-29 22:55:57,712 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 27 [2020-11-29 22:55:57,714 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 135 states to 128 states and 168 transitions. [2020-11-29 22:55:57,714 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2020-11-29 22:55:57,714 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2020-11-29 22:55:57,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 128 states and 168 transitions. [2020-11-29 22:55:57,715 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:57,715 INFO L691 BuchiCegarLoop]: Abstraction has 128 states and 168 transitions. [2020-11-29 22:55:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states and 168 transitions. [2020-11-29 22:55:57,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 109. [2020-11-29 22:55:57,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-29 22:55:57,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 142 transitions. [2020-11-29 22:55:57,722 INFO L714 BuchiCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-11-29 22:55:57,722 INFO L594 BuchiCegarLoop]: Abstraction has 109 states and 142 transitions. [2020-11-29 22:55:57,722 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-11-29 22:55:57,722 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 109 states and 142 transitions. [2020-11-29 22:55:57,723 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 23 [2020-11-29 22:55:57,723 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:57,723 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:57,724 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1] [2020-11-29 22:55:57,724 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:57,724 INFO L794 eck$LassoCheckResult]: Stem: 1438#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 1439#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1490#L12 assume !(main_~i~0 >= 10); 1491#L12-2 assume !(main_~i~0 <= 0); 1535#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 1533#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1531#L12 assume !(main_~i~0 >= 10); 1434#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 1435#L15-1 [2020-11-29 22:55:57,724 INFO L796 eck$LassoCheckResult]: Loop: 1435#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 1440#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 1441#L12 assume !(main_~i~0 >= 10); 1518#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 1435#L15-1 [2020-11-29 22:55:57,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:57,725 INFO L82 PathProgramCache]: Analyzing trace with hash 670103747, now seen corresponding path program 1 times [2020-11-29 22:55:57,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:57,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978311519] [2020-11-29 22:55:57,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:57,734 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:57,738 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:57,739 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:57,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:57,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1678390, now seen corresponding path program 2 times [2020-11-29 22:55:57,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:57,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263359177] [2020-11-29 22:55:57,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:57,746 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:57,749 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:57,750 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:57,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1635542008, now seen corresponding path program 1 times [2020-11-29 22:55:57,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:57,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162893528] [2020-11-29 22:55:57,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:57,782 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-29 22:55:57,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162893528] [2020-11-29 22:55:57,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:55:57,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:55:57,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800168418] [2020-11-29 22:55:57,842 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:57,842 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:57,842 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:57,842 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:57,842 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:57,842 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,842 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:57,842 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:57,842 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration8_Loop [2020-11-29 22:55:57,842 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:57,842 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:57,843 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,851 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,854 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:57,858 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 22:55:57,918 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:57,918 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,920 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,920 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:57,924 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:57,924 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,955 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:57,958 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:57,958 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:57,982 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:57,982 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:57,984 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:57,985 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:58,008 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:58,008 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:58,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:58,038 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:58,106 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:58,107 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:58,107 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:58,108 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:58,108 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:58,108 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:58,108 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:58,108 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:58,108 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:58,108 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration8_Loop [2020-11-29 22:55:58,108 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:58,108 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:58,109 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,184 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:58,184 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:58,186 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 22:55:58,188 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:58,188 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:58,188 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:58,188 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:58,188 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:58,189 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:58,189 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:55:58,191 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:58,214 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 22:55:58,216 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:58,216 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:58,216 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:58,216 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:58,218 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:58,218 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:55:58,230 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:58,270 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 22:55:58,272 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:58,272 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:58,272 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:58,272 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:58,274 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:55:58,275 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:58,279 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:58,320 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 22:55:58,322 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:58,322 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:58,322 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:58,322 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:58,322 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:58,324 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:58,324 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:58,326 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:58,331 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:58,331 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:58,334 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:58,334 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:58,334 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:58,334 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 50 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:58,358 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:58,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:58,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:58,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:58,455 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 22:55:58,455 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 22:55:58,456 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 109 states and 142 transitions. cyclomatic complexity: 46 Second operand 3 states. [2020-11-29 22:55:58,548 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 109 states and 142 transitions. cyclomatic complexity: 46. Second operand 3 states. Result 215 states and 277 transitions. Complement of second has 7 states. [2020-11-29 22:55:58,551 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 22:55:58,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-11-29 22:55:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 21 transitions. [2020-11-29 22:55:58,552 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 8 letters. Loop has 4 letters. [2020-11-29 22:55:58,552 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:58,552 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 12 letters. Loop has 4 letters. [2020-11-29 22:55:58,553 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:58,553 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 8 letters. Loop has 8 letters. [2020-11-29 22:55:58,553 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:58,553 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 215 states and 277 transitions. [2020-11-29 22:55:58,555 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 32 [2020-11-29 22:55:58,557 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 215 states to 187 states and 239 transitions. [2020-11-29 22:55:58,557 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 69 [2020-11-29 22:55:58,558 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 74 [2020-11-29 22:55:58,558 INFO L73 IsDeterministic]: Start isDeterministic. Operand 187 states and 239 transitions. [2020-11-29 22:55:58,558 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:58,558 INFO L691 BuchiCegarLoop]: Abstraction has 187 states and 239 transitions. [2020-11-29 22:55:58,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states and 239 transitions. [2020-11-29 22:55:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 167. [2020-11-29 22:55:58,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-11-29 22:55:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 218 transitions. [2020-11-29 22:55:58,568 INFO L714 BuchiCegarLoop]: Abstraction has 167 states and 218 transitions. [2020-11-29 22:55:58,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:58,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:55:58,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:55:58,569 INFO L87 Difference]: Start difference. First operand 167 states and 218 transitions. Second operand 4 states. [2020-11-29 22:55:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:58,594 INFO L93 Difference]: Finished difference Result 162 states and 201 transitions. [2020-11-29 22:55:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:55:58,595 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 162 states and 201 transitions. [2020-11-29 22:55:58,597 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 28 [2020-11-29 22:55:58,598 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 162 states to 110 states and 138 transitions. [2020-11-29 22:55:58,598 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 61 [2020-11-29 22:55:58,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 64 [2020-11-29 22:55:58,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 110 states and 138 transitions. [2020-11-29 22:55:58,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:58,603 INFO L691 BuchiCegarLoop]: Abstraction has 110 states and 138 transitions. [2020-11-29 22:55:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states and 138 transitions. [2020-11-29 22:55:58,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 83. [2020-11-29 22:55:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-29 22:55:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 103 transitions. [2020-11-29 22:55:58,607 INFO L714 BuchiCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-11-29 22:55:58,607 INFO L594 BuchiCegarLoop]: Abstraction has 83 states and 103 transitions. [2020-11-29 22:55:58,608 INFO L427 BuchiCegarLoop]: ======== Iteration 9============ [2020-11-29 22:55:58,608 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 83 states and 103 transitions. [2020-11-29 22:55:58,608 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 16 [2020-11-29 22:55:58,609 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:58,609 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:58,609 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-29 22:55:58,609 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [3, 2, 2, 2, 1, 1, 1] [2020-11-29 22:55:58,610 INFO L794 eck$LassoCheckResult]: Stem: 2153#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2154#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2171#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 2174#L12-2 assume !(main_~i~0 <= 0); 2173#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2170#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2159#L12 assume !(main_~i~0 >= 10); 2160#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2218#L15-1 [2020-11-29 22:55:58,610 INFO L796 eck$LassoCheckResult]: Loop: 2218#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2155#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2156#L12 assume !(main_~i~0 >= 10); 2219#L12-2 assume !(main_~i~0 <= 0); 2220#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2229#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2228#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 2149#L12-2 assume !(main_~i~0 <= 0); 2150#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2223#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2222#L12 assume !(main_~i~0 >= 10); 2221#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2218#L15-1 [2020-11-29 22:55:58,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:58,610 INFO L82 PathProgramCache]: Analyzing trace with hash 612845445, now seen corresponding path program 1 times [2020-11-29 22:55:58,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:58,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274541875] [2020-11-29 22:55:58,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:58,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:58,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274541875] [2020-11-29 22:55:58,636 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409688277] [2020-11-29 22:55:58,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:55:58,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:58,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:58,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:58,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-29 22:55:58,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640117439] [2020-11-29 22:55:58,664 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:55:58,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:58,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1192554916, now seen corresponding path program 1 times [2020-11-29 22:55:58,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:58,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833226267] [2020-11-29 22:55:58,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:58,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,694 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 22:55:58,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833226267] [2020-11-29 22:55:58,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75523507] [2020-11-29 22:55:58,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:58,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:55:58,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:58,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-11-29 22:55:58,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:58,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-11-29 22:55:58,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850352808] [2020-11-29 22:55:58,738 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:55:58,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:58,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 22:55:58,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-29 22:55:58,741 INFO L87 Difference]: Start difference. First operand 83 states and 103 transitions. cyclomatic complexity: 28 Second operand 4 states. [2020-11-29 22:55:58,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:58,796 INFO L93 Difference]: Finished difference Result 87 states and 106 transitions. [2020-11-29 22:55:58,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:55:58,796 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 87 states and 106 transitions. [2020-11-29 22:55:58,797 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 21 [2020-11-29 22:55:58,798 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 87 states to 80 states and 98 transitions. [2020-11-29 22:55:58,798 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 43 [2020-11-29 22:55:58,799 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 43 [2020-11-29 22:55:58,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 80 states and 98 transitions. [2020-11-29 22:55:58,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:58,799 INFO L691 BuchiCegarLoop]: Abstraction has 80 states and 98 transitions. [2020-11-29 22:55:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states and 98 transitions. [2020-11-29 22:55:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2020-11-29 22:55:58,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-29 22:55:58,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-11-29 22:55:58,810 INFO L714 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-11-29 22:55:58,810 INFO L594 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-11-29 22:55:58,810 INFO L427 BuchiCegarLoop]: ======== Iteration 10============ [2020-11-29 22:55:58,811 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 84 transitions. [2020-11-29 22:55:58,811 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 20 [2020-11-29 22:55:58,813 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:58,813 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:58,814 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [3, 3, 1, 1, 1, 1, 1] [2020-11-29 22:55:58,814 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-11-29 22:55:58,814 INFO L794 eck$LassoCheckResult]: Stem: 2386#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2387#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2408#L12 assume !(main_~i~0 >= 10); 2409#L12-2 assume !(main_~i~0 <= 0); 2448#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2446#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2445#L12 assume !(main_~i~0 >= 10); 2444#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2443#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2441#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2414#L12 assume !(main_~i~0 >= 10); 2415#L12-2 [2020-11-29 22:55:58,815 INFO L796 eck$LassoCheckResult]: Loop: 2415#L12-2 assume !(main_~i~0 <= 0); 2429#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2428#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2426#L12 assume !(main_~i~0 >= 10); 2415#L12-2 [2020-11-29 22:55:58,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:58,815 INFO L82 PathProgramCache]: Analyzing trace with hash 52759419, now seen corresponding path program 2 times [2020-11-29 22:55:58,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:58,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000939912] [2020-11-29 22:55:58,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:58,819 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:58,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:58,821 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:58,823 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1573482, now seen corresponding path program 2 times [2020-11-29 22:55:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:58,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87235726] [2020-11-29 22:55:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:58,828 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:58,834 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:58,834 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:58,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:58,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1971928860, now seen corresponding path program 3 times [2020-11-29 22:55:58,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:58,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077972679] [2020-11-29 22:55:58,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:58,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:58,843 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:55:58,865 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:55:58,867 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:55:58,916 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:58,916 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:58,916 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:58,916 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:58,916 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:55:58,917 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:58,917 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:58,917 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:58,917 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration10_Loop [2020-11-29 22:55:58,917 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:58,917 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:58,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:58,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:59,008 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:59,008 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:55:59,016 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:59,017 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:59,026 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:59,026 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:55:59,065 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:59,065 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:59,069 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:55:59,069 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_13=1} Honda state: {v_rep~unnamed0~0~true_13=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:55:59,108 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:55:59,108 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:59,137 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:55:59,137 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:55:59,179 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:55:59,181 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:55:59,181 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:55:59,181 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:55:59,181 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:55:59,182 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:55:59,182 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:59,182 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:55:59,182 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:55:59,182 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration10_Loop [2020-11-29 22:55:59,182 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:55:59,182 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:55:59,183 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:59,186 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:59,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:59,196 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:55:59,255 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:55:59,255 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:59,266 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 22:55:59,268 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:59,268 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:59,268 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:59,268 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:59,268 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:59,269 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:59,269 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:55:59,270 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:59,294 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 22:55:59,295 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:55:59,295 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:55:59,295 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:55:59,295 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:55:59,295 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:55:59,296 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:55:59,296 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:55:59,303 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:55:59,306 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:55:59,306 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:55:59,332 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:55:59,332 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:55:59,332 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:55:59,332 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 59 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:55:59,362 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:55:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,459 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 22:55:59,460 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 22:55:59,460 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-11-29 22:55:59,525 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 108 states and 129 transitions. Complement of second has 7 states. [2020-11-29 22:55:59,529 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 22:55:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:59,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2020-11-29 22:55:59,530 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 11 letters. Loop has 4 letters. [2020-11-29 22:55:59,530 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:59,530 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 22:55:59,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,569 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 22:55:59,570 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 22:55:59,570 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-11-29 22:55:59,629 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 108 states and 129 transitions. Complement of second has 7 states. [2020-11-29 22:55:59,630 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 22:55:59,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2020-11-29 22:55:59,631 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 11 letters. Loop has 4 letters. [2020-11-29 22:55:59,631 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:59,631 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-11-29 22:55:59,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,667 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 22:55:59,668 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 22:55:59,668 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23 Second operand 4 states. [2020-11-29 22:55:59,715 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 23. Second operand 4 states. Result 123 states and 147 transitions. Complement of second has 8 states. [2020-11-29 22:55:59,717 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 22:55:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2020-11-29 22:55:59,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 21 transitions. [2020-11-29 22:55:59,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 11 letters. Loop has 4 letters. [2020-11-29 22:55:59,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:59,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 15 letters. Loop has 4 letters. [2020-11-29 22:55:59,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:59,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 21 transitions. Stem has 11 letters. Loop has 8 letters. [2020-11-29 22:55:59,719 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:55:59,719 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 123 states and 147 transitions. [2020-11-29 22:55:59,721 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 26 [2020-11-29 22:55:59,721 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 123 states to 88 states and 106 transitions. [2020-11-29 22:55:59,721 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 31 [2020-11-29 22:55:59,722 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2020-11-29 22:55:59,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 106 transitions. [2020-11-29 22:55:59,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:59,722 INFO L691 BuchiCegarLoop]: Abstraction has 88 states and 106 transitions. [2020-11-29 22:55:59,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states and 106 transitions. [2020-11-29 22:55:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 55. [2020-11-29 22:55:59,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-29 22:55:59,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2020-11-29 22:55:59,725 INFO L714 BuchiCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-11-29 22:55:59,725 INFO L594 BuchiCegarLoop]: Abstraction has 55 states and 69 transitions. [2020-11-29 22:55:59,725 INFO L427 BuchiCegarLoop]: ======== Iteration 11============ [2020-11-29 22:55:59,725 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 55 states and 69 transitions. [2020-11-29 22:55:59,726 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2020-11-29 22:55:59,726 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:59,726 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:59,727 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 2, 1, 1, 1, 1] [2020-11-29 22:55:59,727 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [4, 3, 3, 2, 2, 1, 1] [2020-11-29 22:55:59,727 INFO L794 eck$LassoCheckResult]: Stem: 2971#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 2972#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3010#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3012#L12-2 assume !(main_~i~0 <= 0); 3011#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3009#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3008#L12 assume !(main_~i~0 >= 10); 3007#L12-2 assume !(main_~i~0 <= 0); 3005#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3003#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3001#L12 assume !(main_~i~0 >= 10); 2988#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2994#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2997#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2995#L12 assume !(main_~i~0 >= 10); 2993#L12-2 assume !(main_~i~0 <= 0); 2981#L15-1 [2020-11-29 22:55:59,728 INFO L796 eck$LassoCheckResult]: Loop: 2981#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2973#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2974#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 2977#L12-2 assume !(main_~i~0 <= 0); 2979#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 2980#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3021#L12 assume !(main_~i~0 >= 10); 3006#L12-2 assume !(main_~i~0 <= 0); 2999#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3002#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3000#L12 assume !(main_~i~0 >= 10); 2998#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 2994#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 2997#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 2995#L12 assume !(main_~i~0 >= 10); 2993#L12-2 assume !(main_~i~0 <= 0); 2981#L15-1 [2020-11-29 22:55:59,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:59,728 INFO L82 PathProgramCache]: Analyzing trace with hash -120270543, now seen corresponding path program 1 times [2020-11-29 22:55:59,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:59,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146784534] [2020-11-29 22:55:59,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:59,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146784534] [2020-11-29 22:55:59,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186396723] [2020-11-29 22:55:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:55:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:59,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:59,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 22:55:59,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771102030] [2020-11-29 22:55:59,811 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:55:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 511811097, now seen corresponding path program 2 times [2020-11-29 22:55:59,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:59,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898362883] [2020-11-29 22:55:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898362883] [2020-11-29 22:55:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004384384] [2020-11-29 22:55:59,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:55:59,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:55:59,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:55:59,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:55:59,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:55:59,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:59,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:55:59,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 22:55:59,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036361482] [2020-11-29 22:55:59,884 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:55:59,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:55:59,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:55:59,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:55:59,885 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. cyclomatic complexity: 20 Second operand 5 states. [2020-11-29 22:55:59,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:55:59,932 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2020-11-29 22:55:59,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:55:59,932 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 81 states and 100 transitions. [2020-11-29 22:55:59,933 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 21 [2020-11-29 22:55:59,933 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 81 states to 79 states and 97 transitions. [2020-11-29 22:55:59,933 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 29 [2020-11-29 22:55:59,934 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 29 [2020-11-29 22:55:59,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 79 states and 97 transitions. [2020-11-29 22:55:59,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:55:59,934 INFO L691 BuchiCegarLoop]: Abstraction has 79 states and 97 transitions. [2020-11-29 22:55:59,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states and 97 transitions. [2020-11-29 22:55:59,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 66. [2020-11-29 22:55:59,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-29 22:55:59,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2020-11-29 22:55:59,936 INFO L714 BuchiCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-11-29 22:55:59,936 INFO L594 BuchiCegarLoop]: Abstraction has 66 states and 82 transitions. [2020-11-29 22:55:59,936 INFO L427 BuchiCegarLoop]: ======== Iteration 12============ [2020-11-29 22:55:59,936 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 66 states and 82 transitions. [2020-11-29 22:55:59,936 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-11-29 22:55:59,936 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:55:59,936 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:55:59,937 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [5, 4, 4, 3, 1, 1, 1, 1] [2020-11-29 22:55:59,937 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [5, 4, 4, 3, 2, 1, 1] [2020-11-29 22:55:59,937 INFO L794 eck$LassoCheckResult]: Stem: 3208#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3209#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3213#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3267#L12-2 assume !(main_~i~0 <= 0); 3266#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3265#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3214#L12 assume !(main_~i~0 >= 10); 3215#L12-2 assume !(main_~i~0 <= 0); 3269#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3268#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3216#L12 assume !(main_~i~0 >= 10); 3217#L12-2 assume !(main_~i~0 <= 0); 3258#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3255#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3256#L12 assume !(main_~i~0 >= 10); 3235#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3227#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3228#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3223#L12 assume !(main_~i~0 >= 10); 3224#L12-2 assume !(main_~i~0 <= 0); 3218#L15-1 [2020-11-29 22:55:59,937 INFO L796 eck$LassoCheckResult]: Loop: 3218#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3219#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3264#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3204#L12-2 assume !(main_~i~0 <= 0); 3205#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3210#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3211#L12 assume !(main_~i~0 >= 10); 3263#L12-2 assume !(main_~i~0 <= 0); 3262#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3261#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3260#L12 assume !(main_~i~0 >= 10); 3259#L12-2 assume !(main_~i~0 <= 0); 3257#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3254#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3230#L12 assume !(main_~i~0 >= 10); 3231#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3227#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3228#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3223#L12 assume !(main_~i~0 >= 10); 3224#L12-2 assume !(main_~i~0 <= 0); 3218#L15-1 [2020-11-29 22:55:59,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:55:59,938 INFO L82 PathProgramCache]: Analyzing trace with hash -353280474, now seen corresponding path program 2 times [2020-11-29 22:55:59,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:55:59,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487680352] [2020-11-29 22:55:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:55:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:55:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:55:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487680352] [2020-11-29 22:55:59,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692080570] [2020-11-29 22:55:59,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:00,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:56:00,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:00,037 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:00,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 22:56:00,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651491742] [2020-11-29 22:56:00,039 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:00,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1575127282, now seen corresponding path program 3 times [2020-11-29 22:56:00,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550709398] [2020-11-29 22:56:00,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550709398] [2020-11-29 22:56:00,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050510967] [2020-11-29 22:56:00,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:00,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-29 22:56:00,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:00,128 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:00,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 22:56:00,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375379185] [2020-11-29 22:56:00,128 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:00,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:00,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:56:00,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:56:00,129 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. cyclomatic complexity: 22 Second operand 6 states. [2020-11-29 22:56:00,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:00,183 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-11-29 22:56:00,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:56:00,184 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 97 states and 119 transitions. [2020-11-29 22:56:00,185 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 25 [2020-11-29 22:56:00,186 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 97 states to 95 states and 116 transitions. [2020-11-29 22:56:00,186 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2020-11-29 22:56:00,186 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2020-11-29 22:56:00,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 116 transitions. [2020-11-29 22:56:00,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:00,187 INFO L691 BuchiCegarLoop]: Abstraction has 95 states and 116 transitions. [2020-11-29 22:56:00,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states and 116 transitions. [2020-11-29 22:56:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-11-29 22:56:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-29 22:56:00,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions. [2020-11-29 22:56:00,189 INFO L714 BuchiCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-11-29 22:56:00,189 INFO L594 BuchiCegarLoop]: Abstraction has 78 states and 96 transitions. [2020-11-29 22:56:00,189 INFO L427 BuchiCegarLoop]: ======== Iteration 13============ [2020-11-29 22:56:00,189 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 78 states and 96 transitions. [2020-11-29 22:56:00,190 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 24 [2020-11-29 22:56:00,190 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:00,190 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:00,192 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 4, 1, 1, 1, 1] [2020-11-29 22:56:00,192 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [6, 5, 5, 4, 2, 1, 1] [2020-11-29 22:56:00,193 INFO L794 eck$LassoCheckResult]: Stem: 3498#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3499#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3503#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3567#L12-2 assume !(main_~i~0 <= 0); 3566#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3565#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3504#L12 assume !(main_~i~0 >= 10); 3505#L12-2 assume !(main_~i~0 <= 0); 3569#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3568#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3506#L12 assume !(main_~i~0 >= 10); 3507#L12-2 assume !(main_~i~0 <= 0); 3571#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3570#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3545#L12 assume !(main_~i~0 >= 10); 3564#L12-2 assume !(main_~i~0 <= 0); 3548#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3544#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3546#L12 assume !(main_~i~0 >= 10); 3523#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3517#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3518#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3513#L12 assume !(main_~i~0 >= 10); 3514#L12-2 assume !(main_~i~0 <= 0); 3509#L15-1 [2020-11-29 22:56:00,194 INFO L796 eck$LassoCheckResult]: Loop: 3509#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3500#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3501#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3494#L12-2 assume !(main_~i~0 <= 0); 3495#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3508#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3563#L12 assume !(main_~i~0 >= 10); 3562#L12-2 assume !(main_~i~0 <= 0); 3561#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3560#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3559#L12 assume !(main_~i~0 >= 10); 3558#L12-2 assume !(main_~i~0 <= 0); 3557#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3556#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3555#L12 assume !(main_~i~0 >= 10); 3554#L12-2 assume !(main_~i~0 <= 0); 3547#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3543#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3524#L12 assume !(main_~i~0 >= 10); 3525#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3517#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3518#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3513#L12 assume !(main_~i~0 >= 10); 3514#L12-2 assume !(main_~i~0 <= 0); 3509#L15-1 [2020-11-29 22:56:00,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,194 INFO L82 PathProgramCache]: Analyzing trace with hash 828663963, now seen corresponding path program 3 times [2020-11-29 22:56:00,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120247730] [2020-11-29 22:56:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120247730] [2020-11-29 22:56:00,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390220776] [2020-11-29 22:56:00,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:00,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-29 22:56:00,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:00,290 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:00,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 22:56:00,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006700359] [2020-11-29 22:56:00,291 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:00,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,292 INFO L82 PathProgramCache]: Analyzing trace with hash -779498109, now seen corresponding path program 4 times [2020-11-29 22:56:00,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170680586] [2020-11-29 22:56:00,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170680586] [2020-11-29 22:56:00,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63498380] [2020-11-29 22:56:00,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:00,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:56:00,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:00,389 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:00,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 22:56:00,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186187213] [2020-11-29 22:56:00,390 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:00,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:00,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:56:00,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:56:00,390 INFO L87 Difference]: Start difference. First operand 78 states and 96 transitions. cyclomatic complexity: 24 Second operand 7 states. [2020-11-29 22:56:00,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:00,464 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2020-11-29 22:56:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:56:00,465 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 113 states and 138 transitions. [2020-11-29 22:56:00,465 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2020-11-29 22:56:00,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 113 states to 111 states and 135 transitions. [2020-11-29 22:56:00,466 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2020-11-29 22:56:00,466 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2020-11-29 22:56:00,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 135 transitions. [2020-11-29 22:56:00,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:00,467 INFO L691 BuchiCegarLoop]: Abstraction has 111 states and 135 transitions. [2020-11-29 22:56:00,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states and 135 transitions. [2020-11-29 22:56:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 90. [2020-11-29 22:56:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-29 22:56:00,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 110 transitions. [2020-11-29 22:56:00,468 INFO L714 BuchiCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-11-29 22:56:00,468 INFO L594 BuchiCegarLoop]: Abstraction has 90 states and 110 transitions. [2020-11-29 22:56:00,468 INFO L427 BuchiCegarLoop]: ======== Iteration 14============ [2020-11-29 22:56:00,468 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 90 states and 110 transitions. [2020-11-29 22:56:00,469 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 28 [2020-11-29 22:56:00,469 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:00,469 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:00,470 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 6, 5, 1, 1, 1, 1] [2020-11-29 22:56:00,470 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [7, 6, 6, 5, 2, 1, 1] [2020-11-29 22:56:00,470 INFO L794 eck$LassoCheckResult]: Stem: 3842#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 3843#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3847#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3919#L12-2 assume !(main_~i~0 <= 0); 3918#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3917#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3848#L12 assume !(main_~i~0 >= 10); 3849#L12-2 assume !(main_~i~0 <= 0); 3926#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3924#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3850#L12 assume !(main_~i~0 >= 10); 3851#L12-2 assume !(main_~i~0 <= 0); 3927#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3925#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3923#L12 assume !(main_~i~0 >= 10); 3922#L12-2 assume !(main_~i~0 <= 0); 3921#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3920#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3892#L12 assume !(main_~i~0 >= 10); 3902#L12-2 assume !(main_~i~0 <= 0); 3895#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3891#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3893#L12 assume !(main_~i~0 >= 10); 3869#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3861#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3862#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3857#L12 assume !(main_~i~0 >= 10); 3858#L12-2 assume !(main_~i~0 <= 0); 3853#L15-1 [2020-11-29 22:56:00,470 INFO L796 eck$LassoCheckResult]: Loop: 3853#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3844#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3845#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 3838#L12-2 assume !(main_~i~0 <= 0); 3839#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3852#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3916#L12 assume !(main_~i~0 >= 10); 3915#L12-2 assume !(main_~i~0 <= 0); 3914#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3913#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3912#L12 assume !(main_~i~0 >= 10); 3911#L12-2 assume !(main_~i~0 <= 0); 3910#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3909#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3908#L12 assume !(main_~i~0 >= 10); 3907#L12-2 assume !(main_~i~0 <= 0); 3906#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3905#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3904#L12 assume !(main_~i~0 >= 10); 3903#L12-2 assume !(main_~i~0 <= 0); 3896#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 3894#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3864#L12 assume !(main_~i~0 >= 10); 3865#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 3861#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 3862#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 3857#L12 assume !(main_~i~0 >= 10); 3858#L12-2 assume !(main_~i~0 <= 0); 3853#L15-1 [2020-11-29 22:56:00,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1716309872, now seen corresponding path program 4 times [2020-11-29 22:56:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546110275] [2020-11-29 22:56:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,539 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546110275] [2020-11-29 22:56:00,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361425654] [2020-11-29 22:56:00,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 22:56:00,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:56:00,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:00,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 22:56:00,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325750005] [2020-11-29 22:56:00,604 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:00,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,605 INFO L82 PathProgramCache]: Analyzing trace with hash 759947640, now seen corresponding path program 5 times [2020-11-29 22:56:00,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444958913] [2020-11-29 22:56:00,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444958913] [2020-11-29 22:56:00,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750707314] [2020-11-29 22:56:00,666 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:00,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-29 22:56:00,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:00,728 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 39 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:00,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 22:56:00,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678465722] [2020-11-29 22:56:00,731 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:00,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:00,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:56:00,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:56:00,732 INFO L87 Difference]: Start difference. First operand 90 states and 110 transitions. cyclomatic complexity: 26 Second operand 8 states. [2020-11-29 22:56:00,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:00,823 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2020-11-29 22:56:00,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:56:00,824 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 129 states and 157 transitions. [2020-11-29 22:56:00,825 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 33 [2020-11-29 22:56:00,827 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 129 states to 127 states and 154 transitions. [2020-11-29 22:56:00,827 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2020-11-29 22:56:00,827 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 41 [2020-11-29 22:56:00,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 154 transitions. [2020-11-29 22:56:00,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:00,827 INFO L691 BuchiCegarLoop]: Abstraction has 127 states and 154 transitions. [2020-11-29 22:56:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 154 transitions. [2020-11-29 22:56:00,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 102. [2020-11-29 22:56:00,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-29 22:56:00,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 124 transitions. [2020-11-29 22:56:00,831 INFO L714 BuchiCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-11-29 22:56:00,831 INFO L594 BuchiCegarLoop]: Abstraction has 102 states and 124 transitions. [2020-11-29 22:56:00,831 INFO L427 BuchiCegarLoop]: ======== Iteration 15============ [2020-11-29 22:56:00,831 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 102 states and 124 transitions. [2020-11-29 22:56:00,832 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 32 [2020-11-29 22:56:00,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:00,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:00,836 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 7, 6, 1, 1, 1, 1] [2020-11-29 22:56:00,836 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [8, 7, 7, 6, 2, 1, 1] [2020-11-29 22:56:00,837 INFO L794 eck$LassoCheckResult]: Stem: 4240#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4241#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4245#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4325#L12-2 assume !(main_~i~0 <= 0); 4324#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4323#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4246#L12 assume !(main_~i~0 >= 10); 4247#L12-2 assume !(main_~i~0 <= 0); 4336#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4334#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4248#L12 assume !(main_~i~0 >= 10); 4249#L12-2 assume !(main_~i~0 <= 0); 4337#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4335#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4333#L12 assume !(main_~i~0 >= 10); 4332#L12-2 assume !(main_~i~0 <= 0); 4331#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4330#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4329#L12 assume !(main_~i~0 >= 10); 4328#L12-2 assume !(main_~i~0 <= 0); 4327#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4326#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4295#L12 assume !(main_~i~0 >= 10); 4322#L12-2 assume !(main_~i~0 <= 0); 4298#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4294#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4296#L12 assume !(main_~i~0 >= 10); 4267#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4259#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4260#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4255#L12 assume !(main_~i~0 >= 10); 4256#L12-2 assume !(main_~i~0 <= 0); 4251#L15-1 [2020-11-29 22:56:00,837 INFO L796 eck$LassoCheckResult]: Loop: 4251#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4242#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4243#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4236#L12-2 assume !(main_~i~0 <= 0); 4237#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4250#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4321#L12 assume !(main_~i~0 >= 10); 4320#L12-2 assume !(main_~i~0 <= 0); 4319#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4318#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4317#L12 assume !(main_~i~0 >= 10); 4316#L12-2 assume !(main_~i~0 <= 0); 4315#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4314#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4313#L12 assume !(main_~i~0 >= 10); 4312#L12-2 assume !(main_~i~0 <= 0); 4311#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4310#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4309#L12 assume !(main_~i~0 >= 10); 4308#L12-2 assume !(main_~i~0 <= 0); 4307#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4306#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4305#L12 assume !(main_~i~0 >= 10); 4304#L12-2 assume !(main_~i~0 <= 0); 4297#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4293#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4262#L12 assume !(main_~i~0 >= 10); 4263#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4259#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4260#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4255#L12 assume !(main_~i~0 >= 10); 4256#L12-2 assume !(main_~i~0 <= 0); 4251#L15-1 [2020-11-29 22:56:00,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:00,839 INFO L82 PathProgramCache]: Analyzing trace with hash 750974469, now seen corresponding path program 5 times [2020-11-29 22:56:00,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:00,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332198007] [2020-11-29 22:56:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332198007] [2020-11-29 22:56:00,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87190615] [2020-11-29 22:56:00,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:00,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-29 22:56:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:00,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:56:00,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:01,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 22:56:01,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594140233] [2020-11-29 22:56:01,022 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash -246877459, now seen corresponding path program 6 times [2020-11-29 22:56:01,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:01,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725338371] [2020-11-29 22:56:01,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725338371] [2020-11-29 22:56:01,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102330836] [2020-11-29 22:56:01,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:01,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-29 22:56:01,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:01,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:56:01,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:01,130 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 46 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:01,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 22:56:01,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851707075] [2020-11-29 22:56:01,131 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:01,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:01,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:56:01,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:56:01,132 INFO L87 Difference]: Start difference. First operand 102 states and 124 transitions. cyclomatic complexity: 28 Second operand 9 states. [2020-11-29 22:56:01,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:01,184 INFO L93 Difference]: Finished difference Result 145 states and 176 transitions. [2020-11-29 22:56:01,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:56:01,184 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 145 states and 176 transitions. [2020-11-29 22:56:01,185 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 37 [2020-11-29 22:56:01,186 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 145 states to 143 states and 173 transitions. [2020-11-29 22:56:01,186 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2020-11-29 22:56:01,186 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2020-11-29 22:56:01,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 173 transitions. [2020-11-29 22:56:01,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:01,187 INFO L691 BuchiCegarLoop]: Abstraction has 143 states and 173 transitions. [2020-11-29 22:56:01,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states and 173 transitions. [2020-11-29 22:56:01,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 114. [2020-11-29 22:56:01,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-29 22:56:01,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 138 transitions. [2020-11-29 22:56:01,190 INFO L714 BuchiCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-11-29 22:56:01,190 INFO L594 BuchiCegarLoop]: Abstraction has 114 states and 138 transitions. [2020-11-29 22:56:01,190 INFO L427 BuchiCegarLoop]: ======== Iteration 16============ [2020-11-29 22:56:01,190 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 114 states and 138 transitions. [2020-11-29 22:56:01,191 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2020-11-29 22:56:01,191 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:01,191 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:01,197 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [9, 8, 8, 7, 1, 1, 1, 1] [2020-11-29 22:56:01,197 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [9, 8, 8, 7, 2, 1, 1] [2020-11-29 22:56:01,199 INFO L794 eck$LassoCheckResult]: Stem: 4692#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 4693#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4697#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4785#L12-2 assume !(main_~i~0 <= 0); 4784#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4783#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4698#L12 assume !(main_~i~0 >= 10); 4699#L12-2 assume !(main_~i~0 <= 0); 4800#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4798#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4700#L12 assume !(main_~i~0 >= 10); 4701#L12-2 assume !(main_~i~0 <= 0); 4801#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4799#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4797#L12 assume !(main_~i~0 >= 10); 4796#L12-2 assume !(main_~i~0 <= 0); 4795#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4794#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4793#L12 assume !(main_~i~0 >= 10); 4792#L12-2 assume !(main_~i~0 <= 0); 4791#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4790#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4789#L12 assume !(main_~i~0 >= 10); 4788#L12-2 assume !(main_~i~0 <= 0); 4787#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4786#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4750#L12 assume !(main_~i~0 >= 10); 4760#L12-2 assume !(main_~i~0 <= 0); 4753#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4749#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4751#L12 assume !(main_~i~0 >= 10); 4719#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4711#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4712#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4707#L12 assume !(main_~i~0 >= 10); 4708#L12-2 assume !(main_~i~0 <= 0); 4703#L15-1 [2020-11-29 22:56:01,200 INFO L796 eck$LassoCheckResult]: Loop: 4703#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4694#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4695#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 4688#L12-2 assume !(main_~i~0 <= 0); 4689#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4702#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4782#L12 assume !(main_~i~0 >= 10); 4781#L12-2 assume !(main_~i~0 <= 0); 4780#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4779#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4778#L12 assume !(main_~i~0 >= 10); 4777#L12-2 assume !(main_~i~0 <= 0); 4776#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4775#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4774#L12 assume !(main_~i~0 >= 10); 4773#L12-2 assume !(main_~i~0 <= 0); 4772#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4771#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4770#L12 assume !(main_~i~0 >= 10); 4769#L12-2 assume !(main_~i~0 <= 0); 4768#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4767#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4766#L12 assume !(main_~i~0 >= 10); 4765#L12-2 assume !(main_~i~0 <= 0); 4764#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4763#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4762#L12 assume !(main_~i~0 >= 10); 4761#L12-2 assume !(main_~i~0 <= 0); 4754#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 4752#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4714#L12 assume !(main_~i~0 >= 10); 4715#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 4711#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 4712#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 4707#L12 assume !(main_~i~0 >= 10); 4708#L12-2 assume !(main_~i~0 <= 0); 4703#L15-1 [2020-11-29 22:56:01,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:01,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2128148730, now seen corresponding path program 6 times [2020-11-29 22:56:01,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:01,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873248833] [2020-11-29 22:56:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873248833] [2020-11-29 22:56:01,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833818844] [2020-11-29 22:56:01,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:01,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-29 22:56:01,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:01,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:56:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:01,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 22:56:01,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850097120] [2020-11-29 22:56:01,370 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:01,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:01,371 INFO L82 PathProgramCache]: Analyzing trace with hash 1690714594, now seen corresponding path program 7 times [2020-11-29 22:56:01,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:01,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145467453] [2020-11-29 22:56:01,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 53 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145467453] [2020-11-29 22:56:01,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749239302] [2020-11-29 22:56:01,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:56:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 53 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:01,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 22:56:01,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399073185] [2020-11-29 22:56:01,518 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:01,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:01,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:56:01,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:56:01,519 INFO L87 Difference]: Start difference. First operand 114 states and 138 transitions. cyclomatic complexity: 30 Second operand 10 states. [2020-11-29 22:56:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:01,651 INFO L93 Difference]: Finished difference Result 161 states and 195 transitions. [2020-11-29 22:56:01,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:56:01,656 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 161 states and 195 transitions. [2020-11-29 22:56:01,657 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 41 [2020-11-29 22:56:01,658 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 161 states to 159 states and 192 transitions. [2020-11-29 22:56:01,659 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 49 [2020-11-29 22:56:01,659 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 49 [2020-11-29 22:56:01,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 159 states and 192 transitions. [2020-11-29 22:56:01,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:01,659 INFO L691 BuchiCegarLoop]: Abstraction has 159 states and 192 transitions. [2020-11-29 22:56:01,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states and 192 transitions. [2020-11-29 22:56:01,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 126. [2020-11-29 22:56:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-29 22:56:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 152 transitions. [2020-11-29 22:56:01,663 INFO L714 BuchiCegarLoop]: Abstraction has 126 states and 152 transitions. [2020-11-29 22:56:01,663 INFO L594 BuchiCegarLoop]: Abstraction has 126 states and 152 transitions. [2020-11-29 22:56:01,663 INFO L427 BuchiCegarLoop]: ======== Iteration 17============ [2020-11-29 22:56:01,663 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 126 states and 152 transitions. [2020-11-29 22:56:01,664 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 40 [2020-11-29 22:56:01,664 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:01,664 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:01,667 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 9, 8, 1, 1, 1, 1] [2020-11-29 22:56:01,667 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [10, 9, 9, 8, 2, 1, 1] [2020-11-29 22:56:01,667 INFO L794 eck$LassoCheckResult]: Stem: 5198#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; 5199#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5203#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5299#L12-2 assume !(main_~i~0 <= 0); 5298#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5297#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5204#L12 assume !(main_~i~0 >= 10); 5205#L12-2 assume !(main_~i~0 <= 0); 5318#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5316#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5206#L12 assume !(main_~i~0 >= 10); 5207#L12-2 assume !(main_~i~0 <= 0); 5319#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5317#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5315#L12 assume !(main_~i~0 >= 10); 5314#L12-2 assume !(main_~i~0 <= 0); 5313#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5312#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5311#L12 assume !(main_~i~0 >= 10); 5310#L12-2 assume !(main_~i~0 <= 0); 5309#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5308#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5307#L12 assume !(main_~i~0 >= 10); 5306#L12-2 assume !(main_~i~0 <= 0); 5305#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5304#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5303#L12 assume !(main_~i~0 >= 10); 5302#L12-2 assume !(main_~i~0 <= 0); 5301#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5300#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5260#L12 assume !(main_~i~0 >= 10); 5270#L12-2 assume !(main_~i~0 <= 0); 5263#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5259#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5261#L12 assume !(main_~i~0 >= 10); 5225#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5217#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5218#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5213#L12 assume !(main_~i~0 >= 10); 5214#L12-2 assume !(main_~i~0 <= 0); 5209#L15-1 [2020-11-29 22:56:01,668 INFO L796 eck$LassoCheckResult]: Loop: 5209#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5200#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5201#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5194#L12-2 assume !(main_~i~0 <= 0); 5195#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5208#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5296#L12 assume !(main_~i~0 >= 10); 5295#L12-2 assume !(main_~i~0 <= 0); 5294#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5293#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5292#L12 assume !(main_~i~0 >= 10); 5291#L12-2 assume !(main_~i~0 <= 0); 5290#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5289#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5288#L12 assume !(main_~i~0 >= 10); 5287#L12-2 assume !(main_~i~0 <= 0); 5286#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5285#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5284#L12 assume !(main_~i~0 >= 10); 5283#L12-2 assume !(main_~i~0 <= 0); 5282#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5281#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5280#L12 assume !(main_~i~0 >= 10); 5279#L12-2 assume !(main_~i~0 <= 0); 5278#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5277#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5276#L12 assume !(main_~i~0 >= 10); 5275#L12-2 assume !(main_~i~0 <= 0); 5274#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5273#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5272#L12 assume !(main_~i~0 >= 10); 5271#L12-2 assume !(main_~i~0 <= 0); 5264#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5262#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5220#L12 assume !(main_~i~0 >= 10); 5221#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5217#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5218#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5213#L12 assume !(main_~i~0 >= 10); 5214#L12-2 assume !(main_~i~0 <= 0); 5209#L15-1 [2020-11-29 22:56:01,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:01,668 INFO L82 PathProgramCache]: Analyzing trace with hash -6653585, now seen corresponding path program 7 times [2020-11-29 22:56:01,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:01,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664018968] [2020-11-29 22:56:01,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664018968] [2020-11-29 22:56:01,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958632754] [2020-11-29 22:56:01,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:56:01,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:01,858 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 51 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:01,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 22:56:01,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392935894] [2020-11-29 22:56:01,859 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:01,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:01,859 INFO L82 PathProgramCache]: Analyzing trace with hash 711528023, now seen corresponding path program 8 times [2020-11-29 22:56:01,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:01,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278747328] [2020-11-29 22:56:01,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:01,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278747328] [2020-11-29 22:56:01,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942601448] [2020-11-29 22:56:01,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2020-11-29 22:56:01,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:56:01,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:56:01,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:02,039 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 60 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:02,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:02,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 22:56:02,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443981375] [2020-11-29 22:56:02,040 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:02,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:02,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:56:02,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:56:02,040 INFO L87 Difference]: Start difference. First operand 126 states and 152 transitions. cyclomatic complexity: 32 Second operand 11 states. [2020-11-29 22:56:02,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:02,129 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2020-11-29 22:56:02,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:56:02,130 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 177 states and 214 transitions. [2020-11-29 22:56:02,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 45 [2020-11-29 22:56:02,132 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 177 states to 175 states and 211 transitions. [2020-11-29 22:56:02,133 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 53 [2020-11-29 22:56:02,133 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 53 [2020-11-29 22:56:02,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 175 states and 211 transitions. [2020-11-29 22:56:02,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:02,133 INFO L691 BuchiCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-11-29 22:56:02,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states and 211 transitions. [2020-11-29 22:56:02,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2020-11-29 22:56:02,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-29 22:56:02,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 166 transitions. [2020-11-29 22:56:02,140 INFO L714 BuchiCegarLoop]: Abstraction has 138 states and 166 transitions. [2020-11-29 22:56:02,140 INFO L594 BuchiCegarLoop]: Abstraction has 138 states and 166 transitions. [2020-11-29 22:56:02,140 INFO L427 BuchiCegarLoop]: ======== Iteration 18============ [2020-11-29 22:56:02,141 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 138 states and 166 transitions. [2020-11-29 22:56:02,141 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 44 [2020-11-29 22:56:02,142 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:02,142 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:02,146 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 9, 1, 1, 1, 1] [2020-11-29 22:56:02,146 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [11, 10, 10, 9, 2, 1, 1] [2020-11-29 22:56:02,146 INFO L794 eck$LassoCheckResult]: Stem: 5758#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; 5759#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5763#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5867#L12-2 assume !(main_~i~0 <= 0); 5866#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5865#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5764#L12 assume !(main_~i~0 >= 10); 5765#L12-2 assume !(main_~i~0 <= 0); 5890#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5888#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5766#L12 assume !(main_~i~0 >= 10); 5767#L12-2 assume !(main_~i~0 <= 0); 5891#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5889#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5887#L12 assume !(main_~i~0 >= 10); 5886#L12-2 assume !(main_~i~0 <= 0); 5885#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5884#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5883#L12 assume !(main_~i~0 >= 10); 5882#L12-2 assume !(main_~i~0 <= 0); 5881#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5880#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5879#L12 assume !(main_~i~0 >= 10); 5878#L12-2 assume !(main_~i~0 <= 0); 5877#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5876#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5875#L12 assume !(main_~i~0 >= 10); 5874#L12-2 assume !(main_~i~0 <= 0); 5873#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5872#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5871#L12 assume !(main_~i~0 >= 10); 5870#L12-2 assume !(main_~i~0 <= 0); 5869#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5868#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5825#L12 assume !(main_~i~0 >= 10); 5864#L12-2 assume !(main_~i~0 <= 0); 5828#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5824#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5826#L12 assume !(main_~i~0 >= 10); 5783#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5777#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5778#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5773#L12 assume !(main_~i~0 >= 10); 5774#L12-2 assume !(main_~i~0 <= 0); 5769#L15-1 [2020-11-29 22:56:02,146 INFO L796 eck$LassoCheckResult]: Loop: 5769#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5760#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5761#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 5754#L12-2 assume !(main_~i~0 <= 0); 5755#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5768#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5863#L12 assume !(main_~i~0 >= 10); 5862#L12-2 assume !(main_~i~0 <= 0); 5861#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5860#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5859#L12 assume !(main_~i~0 >= 10); 5858#L12-2 assume !(main_~i~0 <= 0); 5857#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5856#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5855#L12 assume !(main_~i~0 >= 10); 5854#L12-2 assume !(main_~i~0 <= 0); 5853#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5852#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5851#L12 assume !(main_~i~0 >= 10); 5850#L12-2 assume !(main_~i~0 <= 0); 5849#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5848#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5847#L12 assume !(main_~i~0 >= 10); 5846#L12-2 assume !(main_~i~0 <= 0); 5845#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5844#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5843#L12 assume !(main_~i~0 >= 10); 5842#L12-2 assume !(main_~i~0 <= 0); 5841#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5840#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5839#L12 assume !(main_~i~0 >= 10); 5838#L12-2 assume !(main_~i~0 <= 0); 5837#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5836#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5835#L12 assume !(main_~i~0 >= 10); 5834#L12-2 assume !(main_~i~0 <= 0); 5827#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 5823#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5784#L12 assume !(main_~i~0 >= 10); 5785#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 5777#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 5778#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 5773#L12 assume !(main_~i~0 >= 10); 5774#L12-2 assume !(main_~i~0 <= 0); 5769#L15-1 [2020-11-29 22:56:02,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:02,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1242347364, now seen corresponding path program 8 times [2020-11-29 22:56:02,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:02,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920407849] [2020-11-29 22:56:02,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:02,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920407849] [2020-11-29 22:56:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13913903] [2020-11-29 22:56:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:02,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:56:02,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:02,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:56:02,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:02,370 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 57 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:02,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:02,371 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 22:56:02,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951997166] [2020-11-29 22:56:02,371 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-11-29 22:56:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:02,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1875470260, now seen corresponding path program 9 times [2020-11-29 22:56:02,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:02,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389507973] [2020-11-29 22:56:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:02,571 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 67 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:02,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389507973] [2020-11-29 22:56:02,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870195839] [2020-11-29 22:56:02,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:02,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-29 22:56:02,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:02,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:56:02,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 67 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:56:02,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:02,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 22:56:02,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543627398] [2020-11-29 22:56:02,627 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-11-29 22:56:02,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:02,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:56:02,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:56:02,628 INFO L87 Difference]: Start difference. First operand 138 states and 166 transitions. cyclomatic complexity: 34 Second operand 12 states. [2020-11-29 22:56:02,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:02,836 INFO L93 Difference]: Finished difference Result 307 states and 361 transitions. [2020-11-29 22:56:02,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:56:02,836 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 307 states and 361 transitions. [2020-11-29 22:56:02,838 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 104 [2020-11-29 22:56:02,840 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 307 states to 299 states and 352 transitions. [2020-11-29 22:56:02,840 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 104 [2020-11-29 22:56:02,841 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 176 [2020-11-29 22:56:02,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 299 states and 352 transitions. [2020-11-29 22:56:02,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:02,841 INFO L691 BuchiCegarLoop]: Abstraction has 299 states and 352 transitions. [2020-11-29 22:56:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states and 352 transitions. [2020-11-29 22:56:02,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 214. [2020-11-29 22:56:02,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:02,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 258 transitions. [2020-11-29 22:56:02,846 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 258 transitions. [2020-11-29 22:56:02,846 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 258 transitions. [2020-11-29 22:56:02,846 INFO L427 BuchiCegarLoop]: ======== Iteration 19============ [2020-11-29 22:56:02,847 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 258 transitions. [2020-11-29 22:56:02,849 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:02,849 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:02,849 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:02,851 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:02,852 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [12, 11, 11, 10, 2, 1, 1] [2020-11-29 22:56:02,852 INFO L794 eck$LassoCheckResult]: Stem: 6486#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; 6487#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6491#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 6599#L12-2 assume !(main_~i~0 <= 0); 6597#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6595#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6492#L12 assume !(main_~i~0 >= 10); 6493#L12-2 assume !(main_~i~0 <= 0); 6639#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6636#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6494#L12 assume !(main_~i~0 >= 10); 6495#L12-2 assume !(main_~i~0 <= 0); 6625#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6624#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6623#L12 assume !(main_~i~0 >= 10); 6622#L12-2 assume !(main_~i~0 <= 0); 6621#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6620#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6619#L12 assume !(main_~i~0 >= 10); 6618#L12-2 assume !(main_~i~0 <= 0); 6617#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6616#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6615#L12 assume !(main_~i~0 >= 10); 6614#L12-2 assume !(main_~i~0 <= 0); 6613#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6612#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6611#L12 assume !(main_~i~0 >= 10); 6610#L12-2 assume !(main_~i~0 <= 0); 6609#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6608#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6607#L12 assume !(main_~i~0 >= 10); 6606#L12-2 assume !(main_~i~0 <= 0); 6605#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6604#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6603#L12 assume !(main_~i~0 >= 10); 6602#L12-2 assume !(main_~i~0 <= 0); 6601#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6600#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6594#L12 assume !(main_~i~0 >= 10); 6598#L12-2 assume !(main_~i~0 <= 0); 6596#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6593#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6547#L12 assume !(main_~i~0 >= 10); 6548#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 6628#L15-1 [2020-11-29 22:56:02,852 INFO L796 eck$LassoCheckResult]: Loop: 6628#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 6690#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6688#L12 assume !(main_~i~0 >= 10); 6629#L12-2 assume !(main_~i~0 <= 0); 6554#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 6552#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6545#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 6546#L12-2 assume !(main_~i~0 <= 0); 6695#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6488#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6489#L12 assume !(main_~i~0 >= 10); 6482#L12-2 assume !(main_~i~0 <= 0); 6483#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6496#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6694#L12 assume !(main_~i~0 >= 10); 6693#L12-2 assume !(main_~i~0 <= 0); 6692#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6691#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6689#L12 assume !(main_~i~0 >= 10); 6687#L12-2 assume !(main_~i~0 <= 0); 6686#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6684#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6682#L12 assume !(main_~i~0 >= 10); 6680#L12-2 assume !(main_~i~0 <= 0); 6678#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6676#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6674#L12 assume !(main_~i~0 >= 10); 6672#L12-2 assume !(main_~i~0 <= 0); 6670#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6668#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6666#L12 assume !(main_~i~0 >= 10); 6664#L12-2 assume !(main_~i~0 <= 0); 6662#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6660#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6658#L12 assume !(main_~i~0 >= 10); 6656#L12-2 assume !(main_~i~0 <= 0); 6654#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6652#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6650#L12 assume !(main_~i~0 >= 10); 6648#L12-2 assume !(main_~i~0 <= 0); 6646#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6644#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6642#L12 assume !(main_~i~0 >= 10); 6640#L12-2 assume !(main_~i~0 <= 0); 6637#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 6634#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 6631#L12 assume !(main_~i~0 >= 10); 6632#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 6628#L15-1 [2020-11-29 22:56:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 2 times [2020-11-29 22:56:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:02,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998389639] [2020-11-29 22:56:02,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:02,872 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:02,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:02,883 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:02,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1107487295, now seen corresponding path program 10 times [2020-11-29 22:56:02,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:02,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738045454] [2020-11-29 22:56:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:02,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:02,895 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:02,907 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:02,909 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:02,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:02,910 INFO L82 PathProgramCache]: Analyzing trace with hash -429277470, now seen corresponding path program 9 times [2020-11-29 22:56:02,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:02,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252856878] [2020-11-29 22:56:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:02,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:03,012 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 587 proven. 3 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:03,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252856878] [2020-11-29 22:56:03,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360740805] [2020-11-29 22:56:03,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:03,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-29 22:56:03,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:03,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:56:03,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:03,071 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 587 proven. 3 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:03,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:03,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-29 22:56:03,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909101503] [2020-11-29 22:56:03,386 WARN L193 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 52 [2020-11-29 22:56:03,405 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:03,405 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:03,405 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:03,405 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:03,405 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:03,405 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:03,405 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:03,405 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:03,405 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration19_Loop [2020-11-29 22:56:03,405 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:03,405 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:03,406 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:03,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:03,453 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:03,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:03,534 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:03,535 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:56:03,541 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:03,541 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:03,545 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:03,545 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:03,586 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:03,586 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 22:56:03,591 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:03,591 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_15=0} Honda state: {v_rep~unnamed0~0~false_15=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:03,631 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:03,631 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 [2020-11-29 22:56:03,635 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:03,635 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:03,659 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:03,659 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:03,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:03,685 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:03,690 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:03,710 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:03,710 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:03,710 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:03,710 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:03,710 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:03,710 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:03,710 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:03,710 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:03,711 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration19_Loop [2020-11-29 22:56:03,711 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:03,711 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:03,712 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 22:56:03,723 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 22:56:03,745 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:03,763 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:03,825 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:03,825 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:03,828 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 22:56:03,829 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:03,829 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:03,829 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:03,829 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:03,831 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:56:03,831 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:56:03,835 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:03,873 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 22:56:03,874 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:03,874 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:03,874 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:03,874 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:03,874 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:03,875 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:03,875 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:03,877 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:03,897 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 22:56:03,898 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:03,899 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:03,899 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:03,899 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:03,899 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:03,900 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:03,900 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:03,902 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:03,903 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 22:56:03,903 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:03,906 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:03,906 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:03,906 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:03,906 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 22:56:03,926 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:03,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:03,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:03,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:56:03,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:03,997 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 22:56:03,997 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 258 transitions. cyclomatic complexity: 49 Second operand 5 states. [2020-11-29 22:56:04,104 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 258 transitions. cyclomatic complexity: 49. Second operand 5 states. Result 493 states and 601 transitions. Complement of second has 15 states. [2020-11-29 22:56:04,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 1 stem states 6 non-accepting loop states 1 accepting loop states [2020-11-29 22:56:04,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2020-11-29 22:56:04,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 36 transitions. [2020-11-29 22:56:04,104 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 36 transitions. Stem has 44 letters. Loop has 48 letters. [2020-11-29 22:56:04,105 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:04,106 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 36 transitions. Stem has 92 letters. Loop has 48 letters. [2020-11-29 22:56:04,106 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:04,106 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 36 transitions. Stem has 44 letters. Loop has 96 letters. [2020-11-29 22:56:04,107 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:04,108 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 493 states and 601 transitions. [2020-11-29 22:56:04,111 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:04,114 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 493 states to 439 states and 521 transitions. [2020-11-29 22:56:04,114 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 178 [2020-11-29 22:56:04,115 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 183 [2020-11-29 22:56:04,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 439 states and 521 transitions. [2020-11-29 22:56:04,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:04,115 INFO L691 BuchiCegarLoop]: Abstraction has 439 states and 521 transitions. [2020-11-29 22:56:04,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states and 521 transitions. [2020-11-29 22:56:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 427. [2020-11-29 22:56:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-11-29 22:56:04,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 508 transitions. [2020-11-29 22:56:04,124 INFO L714 BuchiCegarLoop]: Abstraction has 427 states and 508 transitions. [2020-11-29 22:56:04,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:04,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:56:04,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:56:04,125 INFO L87 Difference]: Start difference. First operand 427 states and 508 transitions. Second operand 5 states. [2020-11-29 22:56:04,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:04,185 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2020-11-29 22:56:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:56:04,186 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 236 states and 278 transitions. [2020-11-29 22:56:04,187 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:04,189 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 236 states to 221 states and 263 transitions. [2020-11-29 22:56:04,189 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 135 [2020-11-29 22:56:04,189 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 135 [2020-11-29 22:56:04,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 221 states and 263 transitions. [2020-11-29 22:56:04,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:04,189 INFO L691 BuchiCegarLoop]: Abstraction has 221 states and 263 transitions. [2020-11-29 22:56:04,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states and 263 transitions. [2020-11-29 22:56:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 214. [2020-11-29 22:56:04,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:04,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 256 transitions. [2020-11-29 22:56:04,194 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 256 transitions. [2020-11-29 22:56:04,195 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 256 transitions. [2020-11-29 22:56:04,195 INFO L427 BuchiCegarLoop]: ======== Iteration 20============ [2020-11-29 22:56:04,195 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 256 transitions. [2020-11-29 22:56:04,196 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:04,197 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:04,197 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:04,198 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:04,198 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [13, 12, 12, 10, 3, 1, 1] [2020-11-29 22:56:04,198 INFO L794 eck$LassoCheckResult]: Stem: 8449#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; 8450#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8462#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 8516#L12-2 assume !(main_~i~0 <= 0); 8515#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8514#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8512#L12 assume !(main_~i~0 >= 10); 8513#L12-2 assume !(main_~i~0 <= 0); 8595#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8594#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8457#L12 assume !(main_~i~0 >= 10); 8458#L12-2 assume !(main_~i~0 <= 0); 8522#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8520#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8521#L12 assume !(main_~i~0 >= 10); 8593#L12-2 assume !(main_~i~0 <= 0); 8592#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8591#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8590#L12 assume !(main_~i~0 >= 10); 8589#L12-2 assume !(main_~i~0 <= 0); 8588#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8587#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8586#L12 assume !(main_~i~0 >= 10); 8585#L12-2 assume !(main_~i~0 <= 0); 8584#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8583#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8582#L12 assume !(main_~i~0 >= 10); 8581#L12-2 assume !(main_~i~0 <= 0); 8580#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8579#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8578#L12 assume !(main_~i~0 >= 10); 8577#L12-2 assume !(main_~i~0 <= 0); 8576#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8575#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8574#L12 assume !(main_~i~0 >= 10); 8573#L12-2 assume !(main_~i~0 <= 0); 8572#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8571#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8568#L12 assume !(main_~i~0 >= 10); 8570#L12-2 assume !(main_~i~0 <= 0); 8569#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8567#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8455#L12 assume !(main_~i~0 >= 10); 8456#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 8596#L15-1 [2020-11-29 22:56:04,198 INFO L796 eck$LassoCheckResult]: Loop: 8596#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 8565#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8566#L12 assume !(main_~i~0 >= 10); 8445#L12-2 assume !(main_~i~0 <= 0); 8446#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 8451#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8452#L12 assume !(main_~i~0 >= 10); 8531#L12-2 assume !(main_~i~0 <= 0); 8529#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 8528#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8525#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 8526#L12-2 assume !(main_~i~0 <= 0); 8459#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8460#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8527#L12 assume !(main_~i~0 >= 10); 8523#L12-2 assume !(main_~i~0 <= 0); 8524#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8631#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8630#L12 assume !(main_~i~0 >= 10); 8629#L12-2 assume !(main_~i~0 <= 0); 8628#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8627#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8626#L12 assume !(main_~i~0 >= 10); 8625#L12-2 assume !(main_~i~0 <= 0); 8624#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8623#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8622#L12 assume !(main_~i~0 >= 10); 8621#L12-2 assume !(main_~i~0 <= 0); 8620#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8619#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8618#L12 assume !(main_~i~0 >= 10); 8617#L12-2 assume !(main_~i~0 <= 0); 8616#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8615#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8614#L12 assume !(main_~i~0 >= 10); 8613#L12-2 assume !(main_~i~0 <= 0); 8612#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8611#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8610#L12 assume !(main_~i~0 >= 10); 8609#L12-2 assume !(main_~i~0 <= 0); 8608#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8607#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8606#L12 assume !(main_~i~0 >= 10); 8605#L12-2 assume !(main_~i~0 <= 0); 8604#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8603#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8602#L12 assume !(main_~i~0 >= 10); 8601#L12-2 assume !(main_~i~0 <= 0); 8598#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 8600#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 8599#L12 assume !(main_~i~0 >= 10); 8597#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 8596#L15-1 [2020-11-29 22:56:04,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:04,199 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 3 times [2020-11-29 22:56:04,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:04,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752889703] [2020-11-29 22:56:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:04,210 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:04,216 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:04,219 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:04,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:04,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2004957192, now seen corresponding path program 11 times [2020-11-29 22:56:04,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:04,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586110608] [2020-11-29 22:56:04,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:04,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:04,228 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:04,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:04,234 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:04,241 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:04,242 INFO L82 PathProgramCache]: Analyzing trace with hash -364906343, now seen corresponding path program 10 times [2020-11-29 22:56:04,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:04,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364701952] [2020-11-29 22:56:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 671 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:04,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364701952] [2020-11-29 22:56:04,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296971741] [2020-11-29 22:56:04,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:04,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:56:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:56:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 671 proven. 10 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:04,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:04,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-29 22:56:04,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659419606] [2020-11-29 22:56:04,898 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 53 [2020-11-29 22:56:04,926 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:04,926 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:04,926 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:04,926 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:04,926 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:04,926 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:04,926 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:04,926 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:04,926 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration20_Loop [2020-11-29 22:56:04,926 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:04,926 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:04,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:04,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:04,937 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 22:56:04,942 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:05,039 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:05,039 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:05,041 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:05,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:05,044 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:05,044 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:05,068 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:05,068 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:05,093 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:05,093 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:05,103 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:05,139 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:05,139 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:05,139 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:05,139 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:05,139 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:05,139 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:05,139 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:05,139 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:05,139 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration20_Loop [2020-11-29 22:56:05,139 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:05,140 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:05,140 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:05,159 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:05,162 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:05,164 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:05,210 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:05,211 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:05,213 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 22:56:05,214 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:05,214 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:05,214 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:05,214 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:05,214 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:05,215 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:05,215 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:05,217 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:05,220 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:56:05,220 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:05,222 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:05,222 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:05,222 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:05,222 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 22:56:05,243 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:05,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:05,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:05,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:05,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:56:05,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:05,369 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:05,369 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 22:56:05,370 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 256 transitions. cyclomatic complexity: 47 Second operand 6 states. [2020-11-29 22:56:05,579 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 256 transitions. cyclomatic complexity: 47. Second operand 6 states. Result 565 states and 685 transitions. Complement of second has 19 states. [2020-11-29 22:56:05,583 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 22:56:05,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-29 22:56:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 45 transitions. [2020-11-29 22:56:05,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 45 transitions. Stem has 44 letters. Loop has 52 letters. [2020-11-29 22:56:05,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:05,584 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 45 transitions. Stem has 96 letters. Loop has 52 letters. [2020-11-29 22:56:05,585 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:05,585 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 10 states and 45 transitions. Stem has 44 letters. Loop has 104 letters. [2020-11-29 22:56:05,586 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:05,587 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 565 states and 685 transitions. [2020-11-29 22:56:05,591 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:05,594 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 565 states to 483 states and 571 transitions. [2020-11-29 22:56:05,595 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 182 [2020-11-29 22:56:05,595 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 188 [2020-11-29 22:56:05,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 483 states and 571 transitions. [2020-11-29 22:56:05,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:05,595 INFO L691 BuchiCegarLoop]: Abstraction has 483 states and 571 transitions. [2020-11-29 22:56:05,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states and 571 transitions. [2020-11-29 22:56:05,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 469. [2020-11-29 22:56:05,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-11-29 22:56:05,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 556 transitions. [2020-11-29 22:56:05,605 INFO L714 BuchiCegarLoop]: Abstraction has 469 states and 556 transitions. [2020-11-29 22:56:05,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:05,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:56:05,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:56:05,606 INFO L87 Difference]: Start difference. First operand 469 states and 556 transitions. Second operand 6 states. [2020-11-29 22:56:05,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:05,659 INFO L93 Difference]: Finished difference Result 248 states and 288 transitions. [2020-11-29 22:56:05,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:56:05,664 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 248 states and 288 transitions. [2020-11-29 22:56:05,666 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:05,667 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 248 states to 225 states and 265 transitions. [2020-11-29 22:56:05,668 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2020-11-29 22:56:05,668 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2020-11-29 22:56:05,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 225 states and 265 transitions. [2020-11-29 22:56:05,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:05,668 INFO L691 BuchiCegarLoop]: Abstraction has 225 states and 265 transitions. [2020-11-29 22:56:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states and 265 transitions. [2020-11-29 22:56:05,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 214. [2020-11-29 22:56:05,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:05,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 254 transitions. [2020-11-29 22:56:05,674 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 254 transitions. [2020-11-29 22:56:05,674 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 254 transitions. [2020-11-29 22:56:05,674 INFO L427 BuchiCegarLoop]: ======== Iteration 21============ [2020-11-29 22:56:05,674 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 254 transitions. [2020-11-29 22:56:05,675 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:05,675 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:05,676 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:05,685 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:05,685 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [14, 13, 13, 10, 4, 1, 1] [2020-11-29 22:56:05,685 INFO L794 eck$LassoCheckResult]: Stem: 10571#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; 10572#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10584#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 10637#L12-2 assume !(main_~i~0 <= 0); 10636#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10635#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10633#L12 assume !(main_~i~0 >= 10); 10634#L12-2 assume !(main_~i~0 <= 0); 10675#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10674#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10578#L12 assume !(main_~i~0 >= 10); 10579#L12-2 assume !(main_~i~0 <= 0); 10643#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10641#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10642#L12 assume !(main_~i~0 >= 10); 10673#L12-2 assume !(main_~i~0 <= 0); 10672#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10671#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10670#L12 assume !(main_~i~0 >= 10); 10669#L12-2 assume !(main_~i~0 <= 0); 10668#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10667#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10666#L12 assume !(main_~i~0 >= 10); 10665#L12-2 assume !(main_~i~0 <= 0); 10664#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10663#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10662#L12 assume !(main_~i~0 >= 10); 10661#L12-2 assume !(main_~i~0 <= 0); 10660#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10659#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10658#L12 assume !(main_~i~0 >= 10); 10657#L12-2 assume !(main_~i~0 <= 0); 10656#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10655#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10654#L12 assume !(main_~i~0 >= 10); 10653#L12-2 assume !(main_~i~0 <= 0); 10652#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10651#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10647#L12 assume !(main_~i~0 >= 10); 10650#L12-2 assume !(main_~i~0 <= 0); 10649#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10646#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10648#L12 assume !(main_~i~0 >= 10); 10688#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 10689#L15-1 [2020-11-29 22:56:05,685 INFO L796 eck$LassoCheckResult]: Loop: 10689#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10684#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10685#L12 assume !(main_~i~0 >= 10); 10692#L12-2 assume !(main_~i~0 <= 0); 10686#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10687#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10577#L12 assume !(main_~i~0 >= 10); 10567#L12-2 assume !(main_~i~0 <= 0); 10568#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10780#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10779#L12 assume !(main_~i~0 >= 10); 10759#L12-2 assume !(main_~i~0 <= 0); 10680#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 10679#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10677#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 10678#L12-2 assume !(main_~i~0 <= 0); 10725#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10573#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10574#L12 assume !(main_~i~0 >= 10); 10676#L12-2 assume !(main_~i~0 <= 0); 10580#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10581#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10724#L12 assume !(main_~i~0 >= 10); 10723#L12-2 assume !(main_~i~0 <= 0); 10722#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10721#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10720#L12 assume !(main_~i~0 >= 10); 10719#L12-2 assume !(main_~i~0 <= 0); 10718#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10717#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10716#L12 assume !(main_~i~0 >= 10); 10715#L12-2 assume !(main_~i~0 <= 0); 10714#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10713#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10712#L12 assume !(main_~i~0 >= 10); 10711#L12-2 assume !(main_~i~0 <= 0); 10710#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10709#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10708#L12 assume !(main_~i~0 >= 10); 10707#L12-2 assume !(main_~i~0 <= 0); 10706#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10705#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10704#L12 assume !(main_~i~0 >= 10); 10703#L12-2 assume !(main_~i~0 <= 0); 10702#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10701#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10700#L12 assume !(main_~i~0 >= 10); 10699#L12-2 assume !(main_~i~0 <= 0); 10698#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10697#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10696#L12 assume !(main_~i~0 >= 10); 10695#L12-2 assume !(main_~i~0 <= 0); 10691#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 10694#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 10693#L12 assume !(main_~i~0 >= 10); 10690#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 10689#L15-1 [2020-11-29 22:56:05,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:05,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 4 times [2020-11-29 22:56:05,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:05,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110542263] [2020-11-29 22:56:05,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:05,692 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:05,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:05,698 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:05,700 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:05,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash -102857041, now seen corresponding path program 12 times [2020-11-29 22:56:05,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:05,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824585549] [2020-11-29 22:56:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:05,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:05,708 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:05,713 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:05,715 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:05,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:05,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1080327888, now seen corresponding path program 11 times [2020-11-29 22:56:05,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:05,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939580741] [2020-11-29 22:56:05,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:05,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 755 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939580741] [2020-11-29 22:56:05,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318263362] [2020-11-29 22:56:05,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:05,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-29 22:56:05,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:05,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:56:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 755 proven. 21 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:05,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:05,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-29 22:56:05,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277048540] [2020-11-29 22:56:06,188 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 57 [2020-11-29 22:56:06,210 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:06,210 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:06,210 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:06,210 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:06,210 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:06,210 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:06,210 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:06,210 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:06,210 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration21_Loop [2020-11-29 22:56:06,211 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:06,211 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:06,211 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,228 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,273 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:06,273 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:06,279 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:06,280 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:06,305 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:06,305 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:06,309 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:06,330 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:06,330 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:06,330 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:06,330 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:06,330 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:06,330 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:06,330 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:06,330 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:06,330 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration21_Loop [2020-11-29 22:56:06,330 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:06,330 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:06,331 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,345 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,350 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:06,408 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:06,409 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:06,419 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 22:56:06,420 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:06,420 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:06,421 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:06,421 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:06,421 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:06,422 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:06,422 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:06,424 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:06,427 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:56:06,427 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:06,429 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:06,429 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:06,429 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:06,430 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 22:56:06,450 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:06,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:06,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:06,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:06,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:56:06,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:06,586 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 22:56:06,586 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 254 transitions. cyclomatic complexity: 45 Second operand 7 states. [2020-11-29 22:56:06,870 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 254 transitions. cyclomatic complexity: 45. Second operand 7 states. Result 653 states and 789 transitions. Complement of second has 23 states. [2020-11-29 22:56:06,870 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 22:56:06,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-11-29 22:56:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 54 transitions. [2020-11-29 22:56:06,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 44 letters. Loop has 56 letters. [2020-11-29 22:56:06,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:06,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 100 letters. Loop has 56 letters. [2020-11-29 22:56:06,871 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:06,871 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 12 states and 54 transitions. Stem has 44 letters. Loop has 112 letters. [2020-11-29 22:56:06,872 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:06,872 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 653 states and 789 transitions. [2020-11-29 22:56:06,875 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:06,879 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 653 states to 535 states and 631 transitions. [2020-11-29 22:56:06,879 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 186 [2020-11-29 22:56:06,880 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 193 [2020-11-29 22:56:06,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 535 states and 631 transitions. [2020-11-29 22:56:06,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:06,880 INFO L691 BuchiCegarLoop]: Abstraction has 535 states and 631 transitions. [2020-11-29 22:56:06,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states and 631 transitions. [2020-11-29 22:56:06,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 519. [2020-11-29 22:56:06,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 519 states. [2020-11-29 22:56:06,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 614 transitions. [2020-11-29 22:56:06,890 INFO L714 BuchiCegarLoop]: Abstraction has 519 states and 614 transitions. [2020-11-29 22:56:06,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:06,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:56:06,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:56:06,891 INFO L87 Difference]: Start difference. First operand 519 states and 614 transitions. Second operand 7 states. [2020-11-29 22:56:06,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:06,962 INFO L93 Difference]: Finished difference Result 260 states and 298 transitions. [2020-11-29 22:56:06,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:56:06,963 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 260 states and 298 transitions. [2020-11-29 22:56:06,964 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:06,966 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 260 states to 229 states and 267 transitions. [2020-11-29 22:56:06,966 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 143 [2020-11-29 22:56:06,966 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 143 [2020-11-29 22:56:06,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 229 states and 267 transitions. [2020-11-29 22:56:06,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:06,967 INFO L691 BuchiCegarLoop]: Abstraction has 229 states and 267 transitions. [2020-11-29 22:56:06,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states and 267 transitions. [2020-11-29 22:56:06,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 214. [2020-11-29 22:56:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 252 transitions. [2020-11-29 22:56:06,972 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 252 transitions. [2020-11-29 22:56:06,972 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 252 transitions. [2020-11-29 22:56:06,972 INFO L427 BuchiCegarLoop]: ======== Iteration 22============ [2020-11-29 22:56:06,973 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 252 transitions. [2020-11-29 22:56:06,974 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:06,974 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:06,974 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:06,975 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:06,975 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [15, 14, 14, 10, 5, 1, 1] [2020-11-29 22:56:06,975 INFO L794 eck$LassoCheckResult]: Stem: 12876#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; 12877#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12888#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 12940#L12-2 assume !(main_~i~0 <= 0); 12939#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12938#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12936#L12 assume !(main_~i~0 >= 10); 12937#L12-2 assume !(main_~i~0 <= 0); 12946#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12947#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12883#L12 assume !(main_~i~0 >= 10); 12884#L12-2 assume !(main_~i~0 <= 0); 12948#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12944#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12945#L12 assume !(main_~i~0 >= 10); 13050#L12-2 assume !(main_~i~0 <= 0); 13049#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13048#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13047#L12 assume !(main_~i~0 >= 10); 13046#L12-2 assume !(main_~i~0 <= 0); 13045#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13044#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13043#L12 assume !(main_~i~0 >= 10); 13042#L12-2 assume !(main_~i~0 <= 0); 13041#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13040#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13039#L12 assume !(main_~i~0 >= 10); 13038#L12-2 assume !(main_~i~0 <= 0); 13037#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13036#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13035#L12 assume !(main_~i~0 >= 10); 13034#L12-2 assume !(main_~i~0 <= 0); 13033#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13032#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13031#L12 assume !(main_~i~0 >= 10); 13030#L12-2 assume !(main_~i~0 <= 0); 13029#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13028#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13024#L12 assume !(main_~i~0 >= 10); 13027#L12-2 assume !(main_~i~0 <= 0); 13026#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13023#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12882#L12 assume !(main_~i~0 >= 10); 12872#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 12873#L15-1 [2020-11-29 22:56:06,975 INFO L796 eck$LassoCheckResult]: Loop: 12873#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12878#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12879#L12 assume !(main_~i~0 >= 10); 12987#L12-2 assume !(main_~i~0 <= 0); 12986#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12985#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12984#L12 assume !(main_~i~0 >= 10); 12983#L12-2 assume !(main_~i~0 <= 0); 12982#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12981#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12980#L12 assume !(main_~i~0 >= 10); 12961#L12-2 assume !(main_~i~0 <= 0); 12960#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12958#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12959#L12 assume !(main_~i~0 >= 10); 12962#L12-2 assume !(main_~i~0 <= 0); 12954#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 12953#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12950#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 12951#L12-2 assume !(main_~i~0 <= 0); 13025#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13022#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12952#L12 assume !(main_~i~0 >= 10); 12949#L12-2 assume !(main_~i~0 <= 0); 12885#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12886#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13021#L12 assume !(main_~i~0 >= 10); 13020#L12-2 assume !(main_~i~0 <= 0); 13019#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13018#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13017#L12 assume !(main_~i~0 >= 10); 13016#L12-2 assume !(main_~i~0 <= 0); 13015#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13014#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13013#L12 assume !(main_~i~0 >= 10); 13012#L12-2 assume !(main_~i~0 <= 0); 13011#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13010#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13009#L12 assume !(main_~i~0 >= 10); 13008#L12-2 assume !(main_~i~0 <= 0); 13007#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13006#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13005#L12 assume !(main_~i~0 >= 10); 13004#L12-2 assume !(main_~i~0 <= 0); 13003#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 13002#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 13001#L12 assume !(main_~i~0 >= 10); 13000#L12-2 assume !(main_~i~0 <= 0); 12999#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12998#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12997#L12 assume !(main_~i~0 >= 10); 12996#L12-2 assume !(main_~i~0 <= 0); 12995#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12994#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12993#L12 assume !(main_~i~0 >= 10); 12992#L12-2 assume !(main_~i~0 <= 0); 12989#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 12991#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 12990#L12 assume !(main_~i~0 >= 10); 12988#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 12873#L15-1 [2020-11-29 22:56:06,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:06,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 5 times [2020-11-29 22:56:06,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:06,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359045929] [2020-11-29 22:56:06,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:06,986 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:06,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:06,991 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:06,994 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:06,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 591532518, now seen corresponding path program 13 times [2020-11-29 22:56:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:06,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857380130] [2020-11-29 22:56:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:07,002 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:07,008 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:07,011 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1205670279, now seen corresponding path program 12 times [2020-11-29 22:56:07,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:07,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422701588] [2020-11-29 22:56:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:07,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 839 proven. 36 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:07,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422701588] [2020-11-29 22:56:07,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010311104] [2020-11-29 22:56:07,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:07,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2020-11-29 22:56:07,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:07,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:56:07,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 839 proven. 36 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:07,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:07,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-29 22:56:07,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922680543] [2020-11-29 22:56:07,809 WARN L193 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 60 [2020-11-29 22:56:07,833 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:07,833 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:07,833 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:07,833 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:07,834 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:07,834 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:07,834 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:07,834 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:07,834 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration22_Loop [2020-11-29 22:56:07,834 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:07,834 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:07,835 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 22:56:07,840 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 22:56:07,853 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 22:56:07,870 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:07,951 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:07,952 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:07,955 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:07,955 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 98 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:07,960 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:07,960 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:08,003 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:08,003 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 99 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:08,043 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:08,043 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 100 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:08,048 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:08,082 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:08,083 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:08,083 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:08,083 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:08,083 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:08,083 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:08,083 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:08,083 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:08,083 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration22_Loop [2020-11-29 22:56:08,083 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:08,083 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:08,084 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:08,088 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 22:56:08,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:08,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:08,184 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:08,184 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:56:08,192 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 22:56:08,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:08,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:08,194 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:08,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:08,198 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:56:08,198 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 101 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:08,205 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:08,243 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 22:56:08,245 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:08,245 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:08,246 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:08,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:08,247 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:56:08,248 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 102 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:08,251 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:08,285 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 22:56:08,286 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:08,287 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:08,287 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:08,287 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:08,287 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:08,288 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:08,288 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:08,289 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:08,292 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:56:08,292 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:08,294 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:08,294 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:08,294 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:08,294 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 22:56:08,315 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:08,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:08,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:08,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:08,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:56:08,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:08,470 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 230 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:08,471 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 22:56:08,471 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 252 transitions. cyclomatic complexity: 43 Second operand 8 states. [2020-11-29 22:56:08,761 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 252 transitions. cyclomatic complexity: 43. Second operand 8 states. Result 757 states and 913 transitions. Complement of second has 27 states. [2020-11-29 22:56:08,762 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 22:56:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2020-11-29 22:56:08,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 63 transitions. [2020-11-29 22:56:08,762 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 63 transitions. Stem has 44 letters. Loop has 60 letters. [2020-11-29 22:56:08,763 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:08,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 63 transitions. Stem has 104 letters. Loop has 60 letters. [2020-11-29 22:56:08,763 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:08,763 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 63 transitions. Stem has 44 letters. Loop has 120 letters. [2020-11-29 22:56:08,764 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:08,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 757 states and 913 transitions. [2020-11-29 22:56:08,768 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:08,772 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 757 states to 595 states and 701 transitions. [2020-11-29 22:56:08,772 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 190 [2020-11-29 22:56:08,772 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 198 [2020-11-29 22:56:08,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 595 states and 701 transitions. [2020-11-29 22:56:08,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:08,773 INFO L691 BuchiCegarLoop]: Abstraction has 595 states and 701 transitions. [2020-11-29 22:56:08,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states and 701 transitions. [2020-11-29 22:56:08,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 577. [2020-11-29 22:56:08,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 577 states. [2020-11-29 22:56:08,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 682 transitions. [2020-11-29 22:56:08,784 INFO L714 BuchiCegarLoop]: Abstraction has 577 states and 682 transitions. [2020-11-29 22:56:08,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:08,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:56:08,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:56:08,785 INFO L87 Difference]: Start difference. First operand 577 states and 682 transitions. Second operand 8 states. [2020-11-29 22:56:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:08,893 INFO L93 Difference]: Finished difference Result 272 states and 308 transitions. [2020-11-29 22:56:08,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:56:08,893 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 272 states and 308 transitions. [2020-11-29 22:56:08,895 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:08,897 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 272 states to 233 states and 269 transitions. [2020-11-29 22:56:08,897 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 147 [2020-11-29 22:56:08,897 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 147 [2020-11-29 22:56:08,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 233 states and 269 transitions. [2020-11-29 22:56:08,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:08,897 INFO L691 BuchiCegarLoop]: Abstraction has 233 states and 269 transitions. [2020-11-29 22:56:08,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states and 269 transitions. [2020-11-29 22:56:08,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 214. [2020-11-29 22:56:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 250 transitions. [2020-11-29 22:56:08,902 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 250 transitions. [2020-11-29 22:56:08,902 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 250 transitions. [2020-11-29 22:56:08,902 INFO L427 BuchiCegarLoop]: ======== Iteration 23============ [2020-11-29 22:56:08,903 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 250 transitions. [2020-11-29 22:56:08,904 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:08,904 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:08,904 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:08,904 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:08,905 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [16, 15, 15, 10, 6, 1, 1] [2020-11-29 22:56:08,905 INFO L794 eck$LassoCheckResult]: Stem: 15388#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; 15389#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15400#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 15453#L12-2 assume !(main_~i~0 <= 0); 15452#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15451#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15449#L12 assume !(main_~i~0 >= 10); 15450#L12-2 assume !(main_~i~0 <= 0); 15566#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15564#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15395#L12 assume !(main_~i~0 >= 10); 15396#L12-2 assume !(main_~i~0 <= 0); 15459#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15457#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15458#L12 assume !(main_~i~0 >= 10); 15561#L12-2 assume !(main_~i~0 <= 0); 15559#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15557#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15555#L12 assume !(main_~i~0 >= 10); 15553#L12-2 assume !(main_~i~0 <= 0); 15551#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15549#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15547#L12 assume !(main_~i~0 >= 10); 15545#L12-2 assume !(main_~i~0 <= 0); 15543#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15541#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15539#L12 assume !(main_~i~0 >= 10); 15537#L12-2 assume !(main_~i~0 <= 0); 15535#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15533#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15531#L12 assume !(main_~i~0 >= 10); 15529#L12-2 assume !(main_~i~0 <= 0); 15527#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15525#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15523#L12 assume !(main_~i~0 >= 10); 15521#L12-2 assume !(main_~i~0 <= 0); 15519#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15517#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15508#L12 assume !(main_~i~0 >= 10); 15514#L12-2 assume !(main_~i~0 <= 0); 15511#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15507#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15500#L12 assume !(main_~i~0 >= 10); 15384#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 15385#L15-1 [2020-11-29 22:56:08,905 INFO L796 eck$LassoCheckResult]: Loop: 15385#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15390#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15391#L12 assume !(main_~i~0 >= 10); 15394#L12-2 assume !(main_~i~0 <= 0); 15497#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15496#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15495#L12 assume !(main_~i~0 >= 10); 15494#L12-2 assume !(main_~i~0 <= 0); 15493#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15492#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15491#L12 assume !(main_~i~0 >= 10); 15490#L12-2 assume !(main_~i~0 <= 0); 15489#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15488#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15487#L12 assume !(main_~i~0 >= 10); 15472#L12-2 assume !(main_~i~0 <= 0); 15473#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15469#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15467#L12 assume !(main_~i~0 >= 10); 15468#L12-2 assume !(main_~i~0 <= 0); 15465#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 15464#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15461#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 15462#L12-2 assume !(main_~i~0 <= 0); 15569#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15568#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15463#L12 assume !(main_~i~0 >= 10); 15460#L12-2 assume !(main_~i~0 <= 0); 15397#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15398#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15567#L12 assume !(main_~i~0 >= 10); 15565#L12-2 assume !(main_~i~0 <= 0); 15563#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15562#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15560#L12 assume !(main_~i~0 >= 10); 15558#L12-2 assume !(main_~i~0 <= 0); 15556#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15554#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15552#L12 assume !(main_~i~0 >= 10); 15550#L12-2 assume !(main_~i~0 <= 0); 15548#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15546#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15544#L12 assume !(main_~i~0 >= 10); 15542#L12-2 assume !(main_~i~0 <= 0); 15540#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15538#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15536#L12 assume !(main_~i~0 >= 10); 15534#L12-2 assume !(main_~i~0 <= 0); 15532#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15530#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15528#L12 assume !(main_~i~0 >= 10); 15526#L12-2 assume !(main_~i~0 <= 0); 15524#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15522#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15520#L12 assume !(main_~i~0 >= 10); 15518#L12-2 assume !(main_~i~0 <= 0); 15516#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15515#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15512#L12 assume !(main_~i~0 >= 10); 15509#L12-2 assume !(main_~i~0 <= 0); 15499#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 15505#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 15503#L12 assume !(main_~i~0 >= 10); 15498#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 15385#L15-1 [2020-11-29 22:56:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 6 times [2020-11-29 22:56:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:08,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680518698] [2020-11-29 22:56:08,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:08,912 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:08,916 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:08,918 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:08,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:08,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1930483299, now seen corresponding path program 14 times [2020-11-29 22:56:08,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:08,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401965144] [2020-11-29 22:56:08,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:08,926 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:08,932 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:08,934 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash -422612802, now seen corresponding path program 13 times [2020-11-29 22:56:08,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:08,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132843483] [2020-11-29 22:56:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:08,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:09,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 923 proven. 55 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:09,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132843483] [2020-11-29 22:56:09,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355330805] [2020-11-29 22:56:09,044 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:09,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-29 22:56:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:09,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 923 proven. 55 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:09,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:09,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-29 22:56:09,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72994623] [2020-11-29 22:56:09,628 WARN L193 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 64 [2020-11-29 22:56:09,657 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:09,657 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:09,657 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:09,657 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:09,657 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:09,657 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:09,657 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:09,657 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:09,657 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration23_Loop [2020-11-29 22:56:09,657 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:09,657 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:09,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,673 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,719 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:09,719 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:09,721 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:09,721 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:09,724 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:09,724 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_23=1} Honda state: {v_rep~unnamed0~0~true_23=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:09,747 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:09,747 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:09,776 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:09,776 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:09,779 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:09,800 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:09,800 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:09,800 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:09,800 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:09,800 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:09,800 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:09,801 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:09,801 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:09,801 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration23_Loop [2020-11-29 22:56:09,801 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:09,801 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:09,801 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,804 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,812 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,817 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:09,866 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:09,866 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:09,868 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 22:56:09,870 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:09,870 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:09,870 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:09,870 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:09,871 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:56:09,871 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:56:09,874 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:09,897 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 22:56:09,898 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:09,898 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:09,898 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:09,898 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:09,898 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:09,899 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:09,899 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:09,901 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:09,903 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:56:09,904 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:09,906 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:09,906 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:09,906 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:09,906 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 22:56:09,927 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:09,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:09,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:09,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:10,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:56:10,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:10,111 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 22:56:10,111 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 250 transitions. cyclomatic complexity: 41 Second operand 9 states. [2020-11-29 22:56:10,622 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 250 transitions. cyclomatic complexity: 41. Second operand 9 states. Result 877 states and 1057 transitions. Complement of second has 31 states. [2020-11-29 22:56:10,623 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 22:56:10,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 22:56:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 72 transitions. [2020-11-29 22:56:10,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 72 transitions. Stem has 44 letters. Loop has 64 letters. [2020-11-29 22:56:10,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:10,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 72 transitions. Stem has 108 letters. Loop has 64 letters. [2020-11-29 22:56:10,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:10,625 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 16 states and 72 transitions. Stem has 44 letters. Loop has 128 letters. [2020-11-29 22:56:10,626 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:10,626 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 877 states and 1057 transitions. [2020-11-29 22:56:10,631 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:10,636 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 877 states to 663 states and 781 transitions. [2020-11-29 22:56:10,636 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 194 [2020-11-29 22:56:10,637 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 203 [2020-11-29 22:56:10,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 663 states and 781 transitions. [2020-11-29 22:56:10,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:10,637 INFO L691 BuchiCegarLoop]: Abstraction has 663 states and 781 transitions. [2020-11-29 22:56:10,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states and 781 transitions. [2020-11-29 22:56:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 643. [2020-11-29 22:56:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 643 states. [2020-11-29 22:56:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 760 transitions. [2020-11-29 22:56:10,649 INFO L714 BuchiCegarLoop]: Abstraction has 643 states and 760 transitions. [2020-11-29 22:56:10,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:56:10,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:56:10,650 INFO L87 Difference]: Start difference. First operand 643 states and 760 transitions. Second operand 9 states. [2020-11-29 22:56:10,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:10,756 INFO L93 Difference]: Finished difference Result 284 states and 318 transitions. [2020-11-29 22:56:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:56:10,764 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 284 states and 318 transitions. [2020-11-29 22:56:10,765 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:10,766 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 284 states to 237 states and 271 transitions. [2020-11-29 22:56:10,767 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 151 [2020-11-29 22:56:10,767 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 151 [2020-11-29 22:56:10,767 INFO L73 IsDeterministic]: Start isDeterministic. Operand 237 states and 271 transitions. [2020-11-29 22:56:10,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:10,767 INFO L691 BuchiCegarLoop]: Abstraction has 237 states and 271 transitions. [2020-11-29 22:56:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states and 271 transitions. [2020-11-29 22:56:10,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 214. [2020-11-29 22:56:10,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:10,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2020-11-29 22:56:10,772 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 248 transitions. [2020-11-29 22:56:10,772 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 248 transitions. [2020-11-29 22:56:10,772 INFO L427 BuchiCegarLoop]: ======== Iteration 24============ [2020-11-29 22:56:10,772 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 248 transitions. [2020-11-29 22:56:10,773 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:10,773 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:10,774 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:10,774 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:10,775 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [17, 16, 16, 10, 7, 1, 1] [2020-11-29 22:56:10,775 INFO L794 eck$LassoCheckResult]: Stem: 18131#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; 18132#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18142#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 18195#L12-2 assume !(main_~i~0 <= 0); 18194#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18193#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18191#L12 assume !(main_~i~0 >= 10); 18192#L12-2 assume !(main_~i~0 <= 0); 18201#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18202#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18138#L12 assume !(main_~i~0 >= 10); 18139#L12-2 assume !(main_~i~0 <= 0); 18203#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18199#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18200#L12 assume !(main_~i~0 >= 10); 18305#L12-2 assume !(main_~i~0 <= 0); 18304#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18303#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18302#L12 assume !(main_~i~0 >= 10); 18301#L12-2 assume !(main_~i~0 <= 0); 18300#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18299#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18298#L12 assume !(main_~i~0 >= 10); 18297#L12-2 assume !(main_~i~0 <= 0); 18296#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18295#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18294#L12 assume !(main_~i~0 >= 10); 18293#L12-2 assume !(main_~i~0 <= 0); 18292#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18291#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18290#L12 assume !(main_~i~0 >= 10); 18289#L12-2 assume !(main_~i~0 <= 0); 18288#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18287#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18286#L12 assume !(main_~i~0 >= 10); 18285#L12-2 assume !(main_~i~0 <= 0); 18284#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18283#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18279#L12 assume !(main_~i~0 >= 10); 18282#L12-2 assume !(main_~i~0 <= 0); 18281#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18278#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18137#L12 assume !(main_~i~0 >= 10); 18127#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 18128#L15-1 [2020-11-29 22:56:10,775 INFO L796 eck$LassoCheckResult]: Loop: 18128#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18133#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18134#L12 assume !(main_~i~0 >= 10); 18242#L12-2 assume !(main_~i~0 <= 0); 18241#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18240#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18239#L12 assume !(main_~i~0 >= 10); 18238#L12-2 assume !(main_~i~0 <= 0); 18237#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18236#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18235#L12 assume !(main_~i~0 >= 10); 18234#L12-2 assume !(main_~i~0 <= 0); 18233#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18232#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18231#L12 assume !(main_~i~0 >= 10); 18230#L12-2 assume !(main_~i~0 <= 0); 18229#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18228#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18227#L12 assume !(main_~i~0 >= 10); 18216#L12-2 assume !(main_~i~0 <= 0); 18217#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18213#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18211#L12 assume !(main_~i~0 >= 10); 18212#L12-2 assume !(main_~i~0 <= 0); 18209#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 18208#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18205#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 18206#L12-2 assume !(main_~i~0 <= 0); 18280#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18277#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18207#L12 assume !(main_~i~0 >= 10); 18204#L12-2 assume !(main_~i~0 <= 0); 18140#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18141#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18276#L12 assume !(main_~i~0 >= 10); 18275#L12-2 assume !(main_~i~0 <= 0); 18274#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18273#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18272#L12 assume !(main_~i~0 >= 10); 18271#L12-2 assume !(main_~i~0 <= 0); 18270#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18269#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18268#L12 assume !(main_~i~0 >= 10); 18267#L12-2 assume !(main_~i~0 <= 0); 18266#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18265#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18264#L12 assume !(main_~i~0 >= 10); 18263#L12-2 assume !(main_~i~0 <= 0); 18262#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18261#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18260#L12 assume !(main_~i~0 >= 10); 18259#L12-2 assume !(main_~i~0 <= 0); 18258#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18257#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18256#L12 assume !(main_~i~0 >= 10); 18255#L12-2 assume !(main_~i~0 <= 0); 18254#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18253#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18252#L12 assume !(main_~i~0 >= 10); 18251#L12-2 assume !(main_~i~0 <= 0); 18250#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18249#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18248#L12 assume !(main_~i~0 >= 10); 18247#L12-2 assume !(main_~i~0 <= 0); 18244#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 18246#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 18245#L12 assume !(main_~i~0 >= 10); 18243#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 18128#L15-1 [2020-11-29 22:56:10,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:10,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 7 times [2020-11-29 22:56:10,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:10,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997440059] [2020-11-29 22:56:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:10,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:10,782 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:10,786 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:10,788 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1504997932, now seen corresponding path program 15 times [2020-11-29 22:56:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:10,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781334417] [2020-11-29 22:56:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:10,797 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:10,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:10,803 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:10,806 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash -92185483, now seen corresponding path program 14 times [2020-11-29 22:56:10,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:10,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648901344] [2020-11-29 22:56:10,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1007 proven. 78 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:10,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648901344] [2020-11-29 22:56:10,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128866911] [2020-11-29 22:56:10,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:10,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:56:10,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:10,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 22:56:10,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1007 proven. 78 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:11,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:11,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-29 22:56:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797599995] [2020-11-29 22:56:11,548 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 66 [2020-11-29 22:56:11,587 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:11,587 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:11,588 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:11,588 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:11,588 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:11,588 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:11,588 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:11,588 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:11,588 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration24_Loop [2020-11-29 22:56:11,588 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:11,588 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:11,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,595 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,646 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:11,646 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:11,649 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:11,649 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:11,674 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:11,674 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:11,677 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:11,698 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:11,698 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:11,698 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:11,698 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:11,698 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:11,698 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:11,699 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:11,699 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:11,699 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration24_Loop [2020-11-29 22:56:11,699 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:11,699 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:11,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,702 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:11,714 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 22:56:11,763 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:11,763 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:11,765 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 22:56:11,766 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:11,767 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:11,767 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:11,767 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:11,768 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:56:11,768 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-11-29 22:56:11,771 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:56:11,793 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 116 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:11,795 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:11,795 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:11,795 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:11,795 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:11,795 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:11,796 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:11,796 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:11,798 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:11,800 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-11-29 22:56:11,800 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:11,802 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:11,802 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:11,803 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:11,803 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 22:56:11,824 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:11,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:11,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:11,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:11,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:11,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:11,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:56:11,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:11,985 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 22:56:11,986 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 248 transitions. cyclomatic complexity: 39 Second operand 10 states. [2020-11-29 22:56:12,580 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 248 transitions. cyclomatic complexity: 39. Second operand 10 states. Result 1013 states and 1221 transitions. Complement of second has 35 states. [2020-11-29 22:56:12,581 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 22:56:12,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 22:56:12,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 81 transitions. [2020-11-29 22:56:12,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 81 transitions. Stem has 44 letters. Loop has 68 letters. [2020-11-29 22:56:12,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:12,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 81 transitions. Stem has 112 letters. Loop has 68 letters. [2020-11-29 22:56:12,583 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:12,583 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 81 transitions. Stem has 44 letters. Loop has 136 letters. [2020-11-29 22:56:12,584 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:12,585 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1013 states and 1221 transitions. [2020-11-29 22:56:12,590 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:12,595 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1013 states to 739 states and 871 transitions. [2020-11-29 22:56:12,596 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 198 [2020-11-29 22:56:12,596 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 208 [2020-11-29 22:56:12,596 INFO L73 IsDeterministic]: Start isDeterministic. Operand 739 states and 871 transitions. [2020-11-29 22:56:12,597 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:12,597 INFO L691 BuchiCegarLoop]: Abstraction has 739 states and 871 transitions. [2020-11-29 22:56:12,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states and 871 transitions. [2020-11-29 22:56:12,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 717. [2020-11-29 22:56:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 717 states. [2020-11-29 22:56:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 848 transitions. [2020-11-29 22:56:12,610 INFO L714 BuchiCegarLoop]: Abstraction has 717 states and 848 transitions. [2020-11-29 22:56:12,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:12,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-29 22:56:12,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-11-29 22:56:12,611 INFO L87 Difference]: Start difference. First operand 717 states and 848 transitions. Second operand 10 states. [2020-11-29 22:56:12,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:12,683 INFO L93 Difference]: Finished difference Result 296 states and 328 transitions. [2020-11-29 22:56:12,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 22:56:12,683 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 296 states and 328 transitions. [2020-11-29 22:56:12,685 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:12,686 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 296 states to 241 states and 273 transitions. [2020-11-29 22:56:12,687 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 155 [2020-11-29 22:56:12,687 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 155 [2020-11-29 22:56:12,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 241 states and 273 transitions. [2020-11-29 22:56:12,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:12,687 INFO L691 BuchiCegarLoop]: Abstraction has 241 states and 273 transitions. [2020-11-29 22:56:12,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states and 273 transitions. [2020-11-29 22:56:12,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 214. [2020-11-29 22:56:12,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:12,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 246 transitions. [2020-11-29 22:56:12,692 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 246 transitions. [2020-11-29 22:56:12,692 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 246 transitions. [2020-11-29 22:56:12,692 INFO L427 BuchiCegarLoop]: ======== Iteration 25============ [2020-11-29 22:56:12,692 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 246 transitions. [2020-11-29 22:56:12,693 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:12,693 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:12,693 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:12,694 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:12,694 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [18, 17, 17, 10, 8, 1, 1] [2020-11-29 22:56:12,695 INFO L794 eck$LassoCheckResult]: Stem: 21129#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; 21130#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21141#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 21194#L12-2 assume !(main_~i~0 <= 0); 21193#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21192#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21190#L12 assume !(main_~i~0 >= 10); 21191#L12-2 assume !(main_~i~0 <= 0); 21201#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21317#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21137#L12 assume !(main_~i~0 >= 10); 21138#L12-2 assume !(main_~i~0 <= 0); 21200#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21198#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21199#L12 assume !(main_~i~0 >= 10); 21299#L12-2 assume !(main_~i~0 <= 0); 21297#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21295#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21293#L12 assume !(main_~i~0 >= 10); 21291#L12-2 assume !(main_~i~0 <= 0); 21289#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21287#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21285#L12 assume !(main_~i~0 >= 10); 21283#L12-2 assume !(main_~i~0 <= 0); 21281#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21279#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21277#L12 assume !(main_~i~0 >= 10); 21275#L12-2 assume !(main_~i~0 <= 0); 21273#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21271#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21269#L12 assume !(main_~i~0 >= 10); 21267#L12-2 assume !(main_~i~0 <= 0); 21265#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21263#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21261#L12 assume !(main_~i~0 >= 10); 21259#L12-2 assume !(main_~i~0 <= 0); 21257#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21255#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21248#L12 assume !(main_~i~0 >= 10); 21252#L12-2 assume !(main_~i~0 <= 0); 21251#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21247#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21244#L12 assume !(main_~i~0 >= 10); 21125#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 21126#L15-1 [2020-11-29 22:56:12,695 INFO L796 eck$LassoCheckResult]: Loop: 21126#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21202#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21135#L12 assume !(main_~i~0 >= 10); 21136#L12-2 assume !(main_~i~0 <= 0); 21239#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21238#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21237#L12 assume !(main_~i~0 >= 10); 21236#L12-2 assume !(main_~i~0 <= 0); 21235#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21234#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21233#L12 assume !(main_~i~0 >= 10); 21232#L12-2 assume !(main_~i~0 <= 0); 21231#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21230#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21229#L12 assume !(main_~i~0 >= 10); 21228#L12-2 assume !(main_~i~0 <= 0); 21227#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21226#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21225#L12 assume !(main_~i~0 >= 10); 21224#L12-2 assume !(main_~i~0 <= 0); 21223#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21222#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21221#L12 assume !(main_~i~0 >= 10); 21215#L12-2 assume !(main_~i~0 <= 0); 21216#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21211#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21212#L12 assume !(main_~i~0 >= 10); 21217#L12-2 assume !(main_~i~0 <= 0); 21207#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 21206#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21204#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 21203#L12-2 assume !(main_~i~0 <= 0); 21139#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21131#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21132#L12 assume !(main_~i~0 >= 10); 21205#L12-2 assume !(main_~i~0 <= 0); 21313#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21311#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21309#L12 assume !(main_~i~0 >= 10); 21307#L12-2 assume !(main_~i~0 <= 0); 21305#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21303#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21301#L12 assume !(main_~i~0 >= 10); 21300#L12-2 assume !(main_~i~0 <= 0); 21298#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21296#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21294#L12 assume !(main_~i~0 >= 10); 21292#L12-2 assume !(main_~i~0 <= 0); 21290#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21288#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21286#L12 assume !(main_~i~0 >= 10); 21284#L12-2 assume !(main_~i~0 <= 0); 21282#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21280#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21278#L12 assume !(main_~i~0 >= 10); 21276#L12-2 assume !(main_~i~0 <= 0); 21274#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21272#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21270#L12 assume !(main_~i~0 >= 10); 21268#L12-2 assume !(main_~i~0 <= 0); 21266#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21264#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21262#L12 assume !(main_~i~0 >= 10); 21260#L12-2 assume !(main_~i~0 <= 0); 21258#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21256#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21254#L12 assume !(main_~i~0 >= 10); 21253#L12-2 assume !(main_~i~0 <= 0); 21241#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 21249#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 21245#L12 assume !(main_~i~0 >= 10); 21240#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 21126#L15-1 [2020-11-29 22:56:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:12,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 8 times [2020-11-29 22:56:12,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:12,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663252845] [2020-11-29 22:56:12,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:12,701 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:12,709 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:12,711 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:12,712 INFO L82 PathProgramCache]: Analyzing trace with hash 903675531, now seen corresponding path program 16 times [2020-11-29 22:56:12,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:12,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521169104] [2020-11-29 22:56:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:12,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:12,718 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:12,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:12,725 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:12,728 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:12,729 INFO L82 PathProgramCache]: Analyzing trace with hash -950496084, now seen corresponding path program 15 times [2020-11-29 22:56:12,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:12,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698826699] [2020-11-29 22:56:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:12,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1091 proven. 105 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:12,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698826699] [2020-11-29 22:56:12,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031918384] [2020-11-29 22:56:12,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:12,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2020-11-29 22:56:12,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:12,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:56:12,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1091 proven. 105 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:12,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:12,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-29 22:56:12,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83477721] [2020-11-29 22:56:13,645 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 69 [2020-11-29 22:56:13,671 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:13,671 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:13,671 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:13,671 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:13,671 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:13,671 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:13,671 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:13,671 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:13,671 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration25_Loop [2020-11-29 22:56:13,671 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:13,671 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:13,672 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,681 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,792 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:13,792 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:13,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:13,800 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 119 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:13,804 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:13,804 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:13,843 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:13,844 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 120 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:13,881 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:13,881 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:13,884 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:13,905 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:13,905 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:13,905 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:13,905 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:13,905 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:13,905 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:13,905 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:13,905 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:13,905 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration25_Loop [2020-11-29 22:56:13,906 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:13,906 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:13,906 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:13,935 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:14,016 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:14,016 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-11-29 22:56:14,023 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 22:56:14,025 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:14,025 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:14,026 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:14,026 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:14,028 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-11-29 22:56:14,028 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 122 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:14,032 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:14,070 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-11-29 22:56:14,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:14,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:14,072 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:14,072 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:14,072 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:14,073 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:14,074 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 123 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:14,079 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:14,082 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 22:56:14,082 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:14,085 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:14,085 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:14,085 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:14,085 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 124 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:14,113 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:14,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:14,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:14,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-29 22:56:14,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 422 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:14,306 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 22:56:14,306 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 246 transitions. cyclomatic complexity: 37 Second operand 11 states. [2020-11-29 22:56:15,040 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 246 transitions. cyclomatic complexity: 37. Second operand 11 states. Result 1165 states and 1405 transitions. Complement of second has 39 states. [2020-11-29 22:56:15,041 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 22:56:15,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 22:56:15,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 90 transitions. [2020-11-29 22:56:15,041 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 90 transitions. Stem has 44 letters. Loop has 72 letters. [2020-11-29 22:56:15,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:15,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 90 transitions. Stem has 116 letters. Loop has 72 letters. [2020-11-29 22:56:15,042 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:15,042 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 20 states and 90 transitions. Stem has 44 letters. Loop has 144 letters. [2020-11-29 22:56:15,043 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:15,043 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1165 states and 1405 transitions. [2020-11-29 22:56:15,049 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 84 [2020-11-29 22:56:15,055 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1165 states to 823 states and 971 transitions. [2020-11-29 22:56:15,055 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 202 [2020-11-29 22:56:15,056 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 213 [2020-11-29 22:56:15,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 823 states and 971 transitions. [2020-11-29 22:56:15,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:15,056 INFO L691 BuchiCegarLoop]: Abstraction has 823 states and 971 transitions. [2020-11-29 22:56:15,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states and 971 transitions. [2020-11-29 22:56:15,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 799. [2020-11-29 22:56:15,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 799 states. [2020-11-29 22:56:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 946 transitions. [2020-11-29 22:56:15,070 INFO L714 BuchiCegarLoop]: Abstraction has 799 states and 946 transitions. [2020-11-29 22:56:15,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:15,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:56:15,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-11-29 22:56:15,071 INFO L87 Difference]: Start difference. First operand 799 states and 946 transitions. Second operand 11 states. [2020-11-29 22:56:15,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:15,205 INFO L93 Difference]: Finished difference Result 308 states and 338 transitions. [2020-11-29 22:56:15,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 22:56:15,206 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 308 states and 338 transitions. [2020-11-29 22:56:15,207 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 81 [2020-11-29 22:56:15,209 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 308 states to 245 states and 275 transitions. [2020-11-29 22:56:15,209 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 159 [2020-11-29 22:56:15,209 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 159 [2020-11-29 22:56:15,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 245 states and 275 transitions. [2020-11-29 22:56:15,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:15,209 INFO L691 BuchiCegarLoop]: Abstraction has 245 states and 275 transitions. [2020-11-29 22:56:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states and 275 transitions. [2020-11-29 22:56:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 214. [2020-11-29 22:56:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-11-29 22:56:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2020-11-29 22:56:15,213 INFO L714 BuchiCegarLoop]: Abstraction has 214 states and 244 transitions. [2020-11-29 22:56:15,213 INFO L594 BuchiCegarLoop]: Abstraction has 214 states and 244 transitions. [2020-11-29 22:56:15,213 INFO L427 BuchiCegarLoop]: ======== Iteration 26============ [2020-11-29 22:56:15,214 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 214 states and 244 transitions. [2020-11-29 22:56:15,214 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:15,214 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:15,215 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:15,215 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [11, 10, 10, 10, 1, 1, 1] [2020-11-29 22:56:15,215 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [19, 18, 18, 10, 9, 1, 1] [2020-11-29 22:56:15,216 INFO L794 eck$LassoCheckResult]: Stem: 24406#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; 24407#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24417#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 24470#L12-2 assume !(main_~i~0 <= 0); 24469#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24468#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24466#L12 assume !(main_~i~0 >= 10); 24467#L12-2 assume !(main_~i~0 <= 0); 24596#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24594#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24413#L12 assume !(main_~i~0 >= 10); 24414#L12-2 assume !(main_~i~0 <= 0); 24476#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24474#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24475#L12 assume !(main_~i~0 >= 10); 24574#L12-2 assume !(main_~i~0 <= 0); 24572#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24570#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24568#L12 assume !(main_~i~0 >= 10); 24566#L12-2 assume !(main_~i~0 <= 0); 24564#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24562#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24560#L12 assume !(main_~i~0 >= 10); 24558#L12-2 assume !(main_~i~0 <= 0); 24556#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24554#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24552#L12 assume !(main_~i~0 >= 10); 24550#L12-2 assume !(main_~i~0 <= 0); 24548#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24546#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24544#L12 assume !(main_~i~0 >= 10); 24542#L12-2 assume !(main_~i~0 <= 0); 24540#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24538#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24536#L12 assume !(main_~i~0 >= 10); 24534#L12-2 assume !(main_~i~0 <= 0); 24532#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24530#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24523#L12 assume !(main_~i~0 >= 10); 24527#L12-2 assume !(main_~i~0 <= 0); 24526#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24522#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24519#L12 assume !(main_~i~0 >= 10); 24402#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 24403#L15-1 [2020-11-29 22:56:15,216 INFO L796 eck$LassoCheckResult]: Loop: 24403#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24408#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24409#L12 assume !(main_~i~0 >= 10); 24412#L12-2 assume !(main_~i~0 <= 0); 24514#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24513#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24512#L12 assume !(main_~i~0 >= 10); 24511#L12-2 assume !(main_~i~0 <= 0); 24510#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24509#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24508#L12 assume !(main_~i~0 >= 10); 24507#L12-2 assume !(main_~i~0 <= 0); 24506#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24505#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24504#L12 assume !(main_~i~0 >= 10); 24503#L12-2 assume !(main_~i~0 <= 0); 24502#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24501#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24500#L12 assume !(main_~i~0 >= 10); 24499#L12-2 assume !(main_~i~0 <= 0); 24498#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24497#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24496#L12 assume !(main_~i~0 >= 10); 24495#L12-2 assume !(main_~i~0 <= 0); 24494#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24493#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24492#L12 assume !(main_~i~0 >= 10); 24490#L12-2 assume !(main_~i~0 <= 0); 24488#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24489#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24484#L12 assume !(main_~i~0 >= 10); 24485#L12-2 assume !(main_~i~0 <= 0); 24482#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 24481#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24478#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 24477#L12-2 assume !(main_~i~0 <= 0); 24415#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24416#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24479#L12 assume !(main_~i~0 >= 10); 24480#L12-2 assume !(main_~i~0 <= 0); 24588#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24586#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24584#L12 assume !(main_~i~0 >= 10); 24582#L12-2 assume !(main_~i~0 <= 0); 24580#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24578#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24576#L12 assume !(main_~i~0 >= 10); 24575#L12-2 assume !(main_~i~0 <= 0); 24573#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24571#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24569#L12 assume !(main_~i~0 >= 10); 24567#L12-2 assume !(main_~i~0 <= 0); 24565#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24563#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24561#L12 assume !(main_~i~0 >= 10); 24559#L12-2 assume !(main_~i~0 <= 0); 24557#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24555#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24553#L12 assume !(main_~i~0 >= 10); 24551#L12-2 assume !(main_~i~0 <= 0); 24549#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24547#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24545#L12 assume !(main_~i~0 >= 10); 24543#L12-2 assume !(main_~i~0 <= 0); 24541#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24539#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24537#L12 assume !(main_~i~0 >= 10); 24535#L12-2 assume !(main_~i~0 <= 0); 24533#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24531#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24529#L12 assume !(main_~i~0 >= 10); 24528#L12-2 assume !(main_~i~0 <= 0); 24516#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 24524#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 24520#L12 assume !(main_~i~0 >= 10); 24515#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 24403#L15-1 [2020-11-29 22:56:15,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:15,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1244253986, now seen corresponding path program 9 times [2020-11-29 22:56:15,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:15,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852451782] [2020-11-29 22:56:15,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:15,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:15,222 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:15,226 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:15,228 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:15,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:15,228 INFO L82 PathProgramCache]: Analyzing trace with hash -917947454, now seen corresponding path program 17 times [2020-11-29 22:56:15,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:15,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590728097] [2020-11-29 22:56:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:15,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:15,236 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:15,242 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:15,245 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:15,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1759172963, now seen corresponding path program 16 times [2020-11-29 22:56:15,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:15,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453580183] [2020-11-29 22:56:15,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:15,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:15,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1175 proven. 136 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:15,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453580183] [2020-11-29 22:56:15,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227012651] [2020-11-29 22:56:15,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:56:15,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:56:15,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:56:15,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 22:56:15,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1175 proven. 136 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2020-11-29 22:56:15,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:56:15,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-29 22:56:15,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104099995] [2020-11-29 22:56:16,023 WARN L193 SmtUtils]: Spent 559.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 74 [2020-11-29 22:56:16,038 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:16,038 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:16,038 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:16,038 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:16,038 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-11-29 22:56:16,038 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:16,039 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:16,039 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:16,039 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration26_Loop [2020-11-29 22:56:16,039 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:16,039 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:16,039 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:16,042 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:16,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:16,058 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:16,108 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:16,109 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:16,111 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:16,111 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:16,128 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-11-29 22:56:16,128 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_29=1} Honda state: {v_rep~unnamed0~0~true_29=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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) [2020-11-29 22:56:16,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-11-29 22:56:16,166 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 127 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/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 22:56:16,200 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-11-29 22:56:16,200 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-11-29 22:56:16,203 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-11-29 22:56:16,224 INFO L210 LassoAnalysis]: Preferences: [2020-11-29 22:56:16,224 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-11-29 22:56:16,224 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-11-29 22:56:16,224 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-11-29 22:56:16,225 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-11-29 22:56:16,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:16,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-11-29 22:56:16,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-11-29 22:56:16,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: UpAndDownIneq.c_Iteration26_Loop [2020-11-29 22:56:16,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-11-29 22:56:16,225 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-11-29 22:56:16,225 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 22:56:16,233 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:16,238 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 22:56:16,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-11-29 22:56:16,284 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-11-29 22:56:16,284 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:16,286 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 22:56:16,288 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-11-29 22:56:16,288 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-11-29 22:56:16,288 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-11-29 22:56:16,288 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-11-29 22:56:16,288 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-11-29 22:56:16,289 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-11-29 22:56:16,289 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-11-29 22:56:16,295 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-11-29 22:56:16,301 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-11-29 22:56:16,301 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_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/z3 Starting monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-11-29 22:56:16,303 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-11-29 22:56:16,303 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-11-29 22:56:16,303 INFO L510 LassoAnalysis]: Proved termination. [2020-11-29 22:56:16,303 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 22:56:16,323 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-11-29 22:56:16,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:16,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-29 22:56:16,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:16,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:56:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 22:56:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:56:16,509 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-11-29 22:56:16,510 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 22:56:16,510 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 214 states and 244 transitions. cyclomatic complexity: 35 Second operand 12 states. [2020-11-29 22:56:17,476 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 214 states and 244 transitions. cyclomatic complexity: 35. Second operand 12 states. Result 1239 states and 1496 transitions. Complement of second has 43 states. [2020-11-29 22:56:17,477 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 22:56:17,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 22:56:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 97 transitions. [2020-11-29 22:56:17,478 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 97 transitions. Stem has 44 letters. Loop has 76 letters. [2020-11-29 22:56:17,478 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:17,478 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 97 transitions. Stem has 120 letters. Loop has 76 letters. [2020-11-29 22:56:17,479 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:17,479 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 22 states and 97 transitions. Stem has 44 letters. Loop has 152 letters. [2020-11-29 22:56:17,480 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-11-29 22:56:17,480 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 1239 states and 1496 transitions. [2020-11-29 22:56:17,487 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:17,493 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 1239 states to 787 states and 932 transitions. [2020-11-29 22:56:17,493 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 168 [2020-11-29 22:56:17,493 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 172 [2020-11-29 22:56:17,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 787 states and 932 transitions. [2020-11-29 22:56:17,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:17,494 INFO L691 BuchiCegarLoop]: Abstraction has 787 states and 932 transitions. [2020-11-29 22:56:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states and 932 transitions. [2020-11-29 22:56:17,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 401. [2020-11-29 22:56:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 401 states. [2020-11-29 22:56:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 456 transitions. [2020-11-29 22:56:17,505 INFO L714 BuchiCegarLoop]: Abstraction has 401 states and 456 transitions. [2020-11-29 22:56:17,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:56:17,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-29 22:56:17,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-11-29 22:56:17,506 INFO L87 Difference]: Start difference. First operand 401 states and 456 transitions. Second operand 12 states. [2020-11-29 22:56:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:56:17,749 INFO L93 Difference]: Finished difference Result 405 states and 418 transitions. [2020-11-29 22:56:17,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-29 22:56:17,759 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 405 states and 418 transitions. [2020-11-29 22:56:17,761 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:17,763 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 405 states to 292 states and 305 transitions. [2020-11-29 22:56:17,763 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 178 [2020-11-29 22:56:17,764 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 284 [2020-11-29 22:56:17,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 305 transitions. [2020-11-29 22:56:17,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-11-29 22:56:17,764 INFO L691 BuchiCegarLoop]: Abstraction has 292 states and 305 transitions. [2020-11-29 22:56:17,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 305 transitions. [2020-11-29 22:56:17,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 169. [2020-11-29 22:56:17,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-11-29 22:56:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 182 transitions. [2020-11-29 22:56:17,777 INFO L714 BuchiCegarLoop]: Abstraction has 169 states and 182 transitions. [2020-11-29 22:56:17,777 INFO L594 BuchiCegarLoop]: Abstraction has 169 states and 182 transitions. [2020-11-29 22:56:17,777 INFO L427 BuchiCegarLoop]: ======== Iteration 27============ [2020-11-29 22:56:17,778 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 169 states and 182 transitions. [2020-11-29 22:56:17,778 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 80 [2020-11-29 22:56:17,778 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-11-29 22:56:17,779 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-11-29 22:56:17,779 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1] [2020-11-29 22:56:17,779 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [20, 19, 19, 10, 10, 1, 1] [2020-11-29 22:56:17,779 INFO L794 eck$LassoCheckResult]: Stem: 27489#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~up~0;havoc main_~i~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~up~0 := 0; 27490#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27495#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 27487#L12-2 assume !(main_~i~0 <= 0); 27488#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27493#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27494#L12 assume !(main_~i~0 >= 10); 27485#L12-2 [2020-11-29 22:56:17,780 INFO L796 eck$LassoCheckResult]: Loop: 27485#L12-2 assume !(main_~i~0 <= 0); 27486#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27615#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27614#L12 assume !(main_~i~0 >= 10); 27613#L12-2 assume !(main_~i~0 <= 0); 27612#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27611#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27610#L12 assume !(main_~i~0 >= 10); 27609#L12-2 assume !(main_~i~0 <= 0); 27608#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27607#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27606#L12 assume !(main_~i~0 >= 10); 27605#L12-2 assume !(main_~i~0 <= 0); 27604#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27603#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27602#L12 assume !(main_~i~0 >= 10); 27601#L12-2 assume !(main_~i~0 <= 0); 27600#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27599#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27598#L12 assume !(main_~i~0 >= 10); 27597#L12-2 assume !(main_~i~0 <= 0); 27596#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27595#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27594#L12 assume !(main_~i~0 >= 10); 27593#L12-2 assume !(main_~i~0 <= 0); 27592#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27591#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27590#L12 assume !(main_~i~0 >= 10); 27589#L12-2 assume !(main_~i~0 <= 0); 27588#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27587#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27586#L12 assume !(main_~i~0 >= 10); 27585#L12-2 assume !(main_~i~0 <= 0); 27584#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27583#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27582#L12 assume !(main_~i~0 >= 10); 27580#L12-2 assume main_~i~0 <= 0;main_~up~0 := 1; 27579#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27491#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27492#L12 assume !(main_~i~0 >= 10); 27496#L12-2 assume !(main_~i~0 <= 0); 27581#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27653#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27652#L12 assume !(main_~i~0 >= 10); 27651#L12-2 assume !(main_~i~0 <= 0); 27650#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27649#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27648#L12 assume !(main_~i~0 >= 10); 27647#L12-2 assume !(main_~i~0 <= 0); 27646#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27645#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27644#L12 assume !(main_~i~0 >= 10); 27643#L12-2 assume !(main_~i~0 <= 0); 27642#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27641#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27640#L12 assume !(main_~i~0 >= 10); 27639#L12-2 assume !(main_~i~0 <= 0); 27638#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27637#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27636#L12 assume !(main_~i~0 >= 10); 27635#L12-2 assume !(main_~i~0 <= 0); 27634#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27633#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27632#L12 assume !(main_~i~0 >= 10); 27631#L12-2 assume !(main_~i~0 <= 0); 27630#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27629#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27628#L12 assume !(main_~i~0 >= 10); 27627#L12-2 assume !(main_~i~0 <= 0); 27626#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27625#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27624#L12 assume !(main_~i~0 >= 10); 27623#L12-2 assume !(main_~i~0 <= 0); 27622#L15-1 assume main_~up~0 >= 1;main_~i~0 := 1 + main_~i~0; 27621#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27616#L12 assume main_~i~0 >= 10;main_~up~0 := 0; 27617#L12-2 assume !(main_~i~0 <= 0); 27497#L15-1 assume !(main_~up~0 >= 1);main_~i~0 := main_~i~0 - 1; 27498#L18-1 assume !!(0 <= main_~i~0 && main_~i~0 <= 10); 27620#L12 assume !(main_~i~0 >= 10); 27485#L12-2 [2020-11-29 22:56:17,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:17,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1365704114, now seen corresponding path program 1 times [2020-11-29 22:56:17,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:17,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744354743] [2020-11-29 22:56:17,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:17,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:17,785 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:17,786 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:17,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:17,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1260641161, now seen corresponding path program 18 times [2020-11-29 22:56:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:17,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48686231] [2020-11-29 22:56:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:17,809 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:17,817 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:17,833 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:17,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:56:17,833 INFO L82 PathProgramCache]: Analyzing trace with hash -689456170, now seen corresponding path program 17 times [2020-11-29 22:56:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:56:17,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960702147] [2020-11-29 22:56:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:56:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:17,855 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 22:56:17,863 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 22:56:17,866 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 22:56:18,531 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 78 [2020-11-29 22:56:18,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.11 10:56:18 BoogieIcfgContainer [2020-11-29 22:56:18,604 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-11-29 22:56:18,605 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:56:18,605 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:56:18,605 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:56:18,606 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:55:52" (3/4) ... [2020-11-29 22:56:18,609 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2020-11-29 22:56:18,655 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6776e13c-38b9-4569-9cb1-73f2a8c87820/bin/uautomizer/witness.graphml [2020-11-29 22:56:18,655 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:56:18,656 INFO L168 Benchmark]: Toolchain (without parser) took 26740.91 ms. Allocated memory was 111.1 MB in the beginning and 339.7 MB in the end (delta: 228.6 MB). Free memory was 80.0 MB in the beginning and 212.8 MB in the end (delta: -132.7 MB). Peak memory consumption was 96.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:18,656 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory was 52.6 MB in the beginning and 52.6 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:18,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.34 ms. Allocated memory is still 111.1 MB. Free memory was 79.7 MB in the beginning and 89.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:18,657 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.62 ms. Allocated memory is still 111.1 MB. Free memory was 89.3 MB in the beginning and 88.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:18,658 INFO L168 Benchmark]: Boogie Preprocessor took 16.97 ms. Allocated memory is still 111.1 MB. Free memory was 88.0 MB in the beginning and 87.4 MB in the end (delta: 665.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:56:18,658 INFO L168 Benchmark]: RCFGBuilder took 237.54 ms. Allocated memory is still 111.1 MB. Free memory was 87.4 MB in the beginning and 79.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:18,658 INFO L168 Benchmark]: BuchiAutomizer took 26167.61 ms. Allocated memory was 111.1 MB in the beginning and 339.7 MB in the end (delta: 228.6 MB). Free memory was 78.8 MB in the beginning and 215.8 MB in the end (delta: -137.0 MB). Peak memory consumption was 201.6 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:18,659 INFO L168 Benchmark]: Witness Printer took 50.00 ms. Allocated memory is still 339.7 MB. Free memory was 215.8 MB in the beginning and 212.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:56:18,661 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 81.8 MB. Free memory was 52.6 MB in the beginning and 52.6 MB in the end (delta: 25.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.34 ms. Allocated memory is still 111.1 MB. Free memory was 79.7 MB in the beginning and 89.3 MB in the end (delta: -9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.62 ms. Allocated memory is still 111.1 MB. Free memory was 89.3 MB in the beginning and 88.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.97 ms. Allocated memory is still 111.1 MB. Free memory was 88.0 MB in the beginning and 87.4 MB in the end (delta: 665.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 237.54 ms. Allocated memory is still 111.1 MB. Free memory was 87.4 MB in the beginning and 79.0 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 26167.61 ms. Allocated memory was 111.1 MB in the beginning and 339.7 MB in the end (delta: 228.6 MB). Free memory was 78.8 MB in the beginning and 215.8 MB in the end (delta: -137.0 MB). Peak memory consumption was 201.6 MB. Max. memory is 16.1 GB. * Witness Printer took 50.00 ms. Allocated memory is still 339.7 MB. Free memory was 215.8 MB in the beginning and 212.8 MB in the end (delta: 3.1 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 37 terminating modules (22 trivial, 14 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 + 1 and consists of 4 locations. One deterministic module has affine ranking function -2 * i + 17 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 -1 * i and consists of 4 locations. One deterministic module has affine ranking function i and consists of 8 locations. One deterministic module has affine ranking function i and consists of 10 locations. One deterministic module has affine ranking function i and consists of 12 locations. One deterministic module has affine ranking function i and consists of 14 locations. One deterministic module has affine ranking function i and consists of 16 locations. One deterministic module has affine ranking function i and consists of 18 locations. One deterministic module has affine ranking function i and consists of 20 locations. One deterministic module has affine ranking function i and consists of 22 locations. One nondeterministic module has affine ranking function -2 * i + 17 and consists of 4 locations. 22 modules have a trivial ranking function, the largest among these consists of 12 locations. The remainder module has 169 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 26.0s and 27 iterations. TraceHistogramMax:20. Analysis of lassos took 17.2s. Construction of modules took 3.0s. Büchi inclusion checks took 5.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 36. Automata minimization 0.2s AutomataMinimizationTime, 37 MinimizatonAttempts, 1211 StatesRemovedByMinimization, 36 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 214 states and ocurred in iteration 18. Nontrivial modules had stage [14, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 1520/3680 HoareTripleCheckerStatistics: 266 SDtfs, 767 SDslu, 9 SDs, 0 SdLazy, 2635 SolverSat, 277 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time LassoAnalysisResults: nont1 unkn0 SFLI2 SFLT4 conc0 concLT10 SILN0 SILU0 SILI9 SILT1 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax160 hnf96 lsp44 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq127 hnf96 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 43ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 23 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 15 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.2s - 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@44330371=0, \result=0, i=9} - 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 TRUE i >= 10 [L13] up = 0 [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) 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 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 [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) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...