./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be --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 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-e943c26 [2021-10-21 19:43:24,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:43:24,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:43:24,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:43:24,620 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:43:24,625 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:43:24,628 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:43:24,632 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:43:24,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:43:24,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:43:24,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:43:24,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:43:24,646 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:43:24,649 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:43:24,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:43:24,656 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:43:24,658 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:43:24,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:43:24,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:43:24,672 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:43:24,674 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:43:24,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:43:24,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:43:24,681 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:43:24,691 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:43:24,691 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:43:24,692 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:43:24,694 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:43:24,695 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:43:24,697 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:43:24,697 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:43:24,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:43:24,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:43:24,702 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:43:24,704 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:43:24,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:43:24,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:43:24,706 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:43:24,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:43:24,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:43:24,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:43:24,709 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-21 19:43:24,764 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:43:24,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:43:24,765 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:43:24,766 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:43:24,767 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:43:24,768 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:43:24,768 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:43:24,768 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-21 19:43:24,769 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-21 19:43:24,769 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-21 19:43:24,770 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-21 19:43:24,770 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-21 19:43:24,771 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-21 19:43:24,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:43:24,771 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-21 19:43:24,771 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:43:24,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:43:24,772 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-21 19:43:24,772 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-21 19:43:24,772 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-21 19:43:24,773 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:43:24,773 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-21 19:43:24,773 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:43:24,773 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-21 19:43:24,774 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:43:24,774 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:43:24,774 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:43:24,774 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:43:24,775 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:43:24,776 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-21 19:43:24,777 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_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac [2021-10-21 19:43:25,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:43:25,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:43:25,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:43:25,075 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:43:25,076 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:43:25,077 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-10-21 19:43:25,155 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/data/4bd7b359a/79164bc1916b46279bc3b83f3d94034b/FLAGb45d637d0 [2021-10-21 19:43:25,712 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:43:25,713 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-10-21 19:43:25,728 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/data/4bd7b359a/79164bc1916b46279bc3b83f3d94034b/FLAGb45d637d0 [2021-10-21 19:43:26,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/data/4bd7b359a/79164bc1916b46279bc3b83f3d94034b [2021-10-21 19:43:26,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:43:26,083 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:43:26,088 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:43:26,088 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:43:26,092 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:43:26,093 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,095 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@600a65af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26, skipping insertion in model container [2021-10-21 19:43:26,096 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:43:26,119 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:43:26,362 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:43:26,368 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:43:26,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:43:26,402 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:43:26,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26 WrapperNode [2021-10-21 19:43:26,402 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:43:26,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:43:26,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:43:26,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:43:26,413 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,418 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:43:26,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:43:26,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:43:26,438 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:43:26,447 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,450 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,455 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,456 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:43:26,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:43:26,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:43:26,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:43:26,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (1/1) ... [2021-10-21 19:43:26,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:26,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:26,504 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:26,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-21 19:43:26,562 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:43:26,563 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:43:26,777 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:43:26,778 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-21 19:43:26,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:43:26 BoogieIcfgContainer [2021-10-21 19:43:26,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:43:26,783 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-21 19:43:26,783 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-21 19:43:26,786 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-21 19:43:26,787 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:43:26,788 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 21.10 07:43:26" (1/3) ... [2021-10-21 19:43:26,789 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@23b02c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:43:26, skipping insertion in model container [2021-10-21 19:43:26,789 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:43:26,790 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:43:26" (2/3) ... [2021-10-21 19:43:26,790 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@23b02c23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 21.10 07:43:26, skipping insertion in model container [2021-10-21 19:43:26,790 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-21 19:43:26,791 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:43:26" (3/3) ... [2021-10-21 19:43:26,792 INFO L389 chiAutomizerObserver]: Analyzing ICFG Narrowing.c [2021-10-21 19:43:26,878 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-21 19:43:26,878 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-21 19:43:26,879 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-21 19:43:26,879 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-21 19:43:26,879 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-21 19:43:26,879 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-21 19:43:26,879 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-21 19:43:26,879 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-21 19:43:26,895 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:26,917 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-21 19:43:26,917 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:26,917 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:26,923 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-21 19:43:26,924 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:26,924 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-21 19:43:26,924 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:26,926 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-21 19:43:26,926 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:26,927 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:26,927 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-21 19:43:26,927 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:26,934 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 5#L26-1true [2021-10-21 19:43:26,935 INFO L793 eck$LassoCheckResult]: Loop: 5#L26-1true assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 11#L14true assume 0 == main_~i~0;main_~up~0 := 1; 12#L14-2true assume main_~i~0 == main_~range~0;main_~up~0 := 0; 9#L17-1true assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 7#L20-1true assume !(0 == main_~up~0); 10#L23-1true assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5#L26-1true [2021-10-21 19:43:26,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:26,951 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-21 19:43:26,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:26,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795799866] [2021-10-21 19:43:26,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:26,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,063 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,094 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:27,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1186392078, now seen corresponding path program 1 times [2021-10-21 19:43:27,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,100 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573347959] [2021-10-21 19:43:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:27,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:27,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573347959] [2021-10-21 19:43:27,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573347959] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:27,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:27,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:27,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746857628] [2021-10-21 19:43:27,239 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:43:27,240 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:27,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:43:27,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:43:27,260 INFO L87 Difference]: Start difference. First operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:27,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:27,293 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2021-10-21 19:43:27,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:43:27,296 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 30 transitions. [2021-10-21 19:43:27,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:27,302 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 13 states and 22 transitions. [2021-10-21 19:43:27,303 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-21 19:43:27,304 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-21 19:43:27,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 22 transitions. [2021-10-21 19:43:27,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:43:27,305 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-21 19:43:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 22 transitions. [2021-10-21 19:43:27,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-21 19:43:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 22 transitions. [2021-10-21 19:43:27,337 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-21 19:43:27,337 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-21 19:43:27,337 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-21 19:43:27,337 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 22 transitions. [2021-10-21 19:43:27,338 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:27,339 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:27,339 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:27,339 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-21 19:43:27,339 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:27,340 INFO L791 eck$LassoCheckResult]: Stem: 41#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 42#L26-1 [2021-10-21 19:43:27,340 INFO L793 eck$LassoCheckResult]: Loop: 42#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 53#L14 assume 0 == main_~i~0;main_~up~0 := 1; 50#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 48#L17-1 assume !(1 == main_~up~0); 49#L20-1 assume !(0 == main_~up~0); 47#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 42#L26-1 [2021-10-21 19:43:27,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,341 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-10-21 19:43:27,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722717607] [2021-10-21 19:43:27,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,348 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:27,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,353 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:27,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1186394000, now seen corresponding path program 1 times [2021-10-21 19:43:27,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434304906] [2021-10-21 19:43:27,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:27,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:27,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434304906] [2021-10-21 19:43:27,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434304906] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:27,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:27,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:27,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725395334] [2021-10-21 19:43:27,385 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:43:27,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:27,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:43:27,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:43:27,388 INFO L87 Difference]: Start difference. First operand 13 states and 22 transitions. cyclomatic complexity: 10 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:27,414 INFO L93 Difference]: Finished difference Result 13 states and 21 transitions. [2021-10-21 19:43:27,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:43:27,416 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 21 transitions. [2021-10-21 19:43:27,417 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:27,418 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 21 transitions. [2021-10-21 19:43:27,418 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-21 19:43:27,418 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-21 19:43:27,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 21 transitions. [2021-10-21 19:43:27,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:43:27,419 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-21 19:43:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 21 transitions. [2021-10-21 19:43:27,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-21 19:43:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 21 transitions. [2021-10-21 19:43:27,422 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-21 19:43:27,435 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-21 19:43:27,435 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-21 19:43:27,436 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 21 transitions. [2021-10-21 19:43:27,436 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:27,437 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:27,437 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:27,437 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-21 19:43:27,437 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:27,438 INFO L791 eck$LassoCheckResult]: Stem: 73#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 74#L26-1 [2021-10-21 19:43:27,438 INFO L793 eck$LassoCheckResult]: Loop: 74#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 75#L14 assume !(0 == main_~i~0); 80#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 78#L17-1 assume !(1 == main_~up~0); 76#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 77#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 74#L26-1 [2021-10-21 19:43:27,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,439 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2021-10-21 19:43:27,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131679042] [2021-10-21 19:43:27,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,449 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:27,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,472 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1188240980, now seen corresponding path program 1 times [2021-10-21 19:43:27,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918544138] [2021-10-21 19:43:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:27,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:27,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918544138] [2021-10-21 19:43:27,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918544138] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:27,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:27,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:27,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298683981] [2021-10-21 19:43:27,553 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:43:27,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:27,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:27,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:27,565 INFO L87 Difference]: Start difference. First operand 13 states and 21 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:27,657 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2021-10-21 19:43:27,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:43:27,658 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 51 transitions. [2021-10-21 19:43:27,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 32 [2021-10-21 19:43:27,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 51 transitions. [2021-10-21 19:43:27,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-21 19:43:27,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2021-10-21 19:43:27,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 51 transitions. [2021-10-21 19:43:27,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-21 19:43:27,664 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 51 transitions. [2021-10-21 19:43:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 51 transitions. [2021-10-21 19:43:27,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-10-21 19:43:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2021-10-21 19:43:27,680 INFO L704 BuchiCegarLoop]: Abstraction has 30 states and 47 transitions. [2021-10-21 19:43:27,680 INFO L587 BuchiCegarLoop]: Abstraction has 30 states and 47 transitions. [2021-10-21 19:43:27,680 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-21 19:43:27,680 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 47 transitions. [2021-10-21 19:43:27,686 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2021-10-21 19:43:27,686 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:27,686 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:27,687 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-21 19:43:27,687 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:27,687 INFO L791 eck$LassoCheckResult]: Stem: 126#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 127#L26-1 [2021-10-21 19:43:27,687 INFO L793 eck$LassoCheckResult]: Loop: 127#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 144#L14 assume !(0 == main_~i~0); 136#L14-2 assume !(main_~i~0 == main_~range~0); 132#L17-1 assume !(1 == main_~up~0); 133#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 138#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 127#L26-1 [2021-10-21 19:43:27,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2021-10-21 19:43:27,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,696 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024299772] [2021-10-21 19:43:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,696 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,701 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,705 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:27,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1188300564, now seen corresponding path program 1 times [2021-10-21 19:43:27,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041040327] [2021-10-21 19:43:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,730 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,748 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:27,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1363856397, now seen corresponding path program 1 times [2021-10-21 19:43:27,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:27,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336194202] [2021-10-21 19:43:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:27,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:27,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,757 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:27,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:27,775 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:27,899 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:27,900 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:27,900 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:27,901 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:27,901 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:43:27,901 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:27,901 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:27,901 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:27,901 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-10-21 19:43:27,902 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:27,902 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:27,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:27,932 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:27,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:27,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:28,075 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:28,075 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:43:28,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,085 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:28,085 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:28,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-21 19:43:28,122 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:28,122 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: [] [2021-10-21 19:43:28,162 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,164 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:28,171 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:28,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-21 19:43:28,202 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:28,202 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: [] [2021-10-21 19:43:28,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-21 19:43:28,239 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:28,239 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:28,274 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:28,274 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: [] [2021-10-21 19:43:28,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,318 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-21 19:43:28,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:28,327 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:28,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,397 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-21 19:43:28,410 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:43:28,410 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:28,480 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:43:28,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,487 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:28,487 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:28,487 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:28,487 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:28,488 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:43:28,488 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,488 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:28,488 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:28,488 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-10-21 19:43:28,488 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:28,488 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:28,490 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:28,496 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:28,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:28,503 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:28,615 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:28,620 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:43:28,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,626 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,631 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:28,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:28,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:28,643 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:28,643 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:28,643 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:28,646 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:43:28,646 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:28,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-21 19:43:28,666 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:28,700 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,701 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,702 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,711 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:28,721 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:28,721 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:28,721 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:28,721 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:28,727 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:28,727 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:28,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-21 19:43:28,742 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:28,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,788 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:28,798 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:28,798 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:28,798 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:28,798 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:28,803 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:28,803 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:28,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-21 19:43:28,817 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:28,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-21 19:43:28,866 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:28,876 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:28,876 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:28,876 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:28,876 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:28,876 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:28,880 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:43:28,880 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:28,893 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:43:28,899 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:43:28,899 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:43:28,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:28,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:28,903 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:28,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-21 19:43:28,908 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:43:28,908 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:43:28,908 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:43:28,908 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-21 19:43:28,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:28,932 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:43:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:28,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:28,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:28,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:43:28,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:29,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:29,103 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 [2021-10-21 19:43:29,108 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 30 states and 47 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:29,205 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 30 states and 47 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 76 states and 117 transitions. Complement of second has 7 states. [2021-10-21 19:43:29,209 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 [2021-10-21 19:43:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-21 19:43:29,212 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 1 letters. Loop has 6 letters. [2021-10-21 19:43:29,213 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:29,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 6 letters. [2021-10-21 19:43:29,214 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:29,214 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 1 letters. Loop has 12 letters. [2021-10-21 19:43:29,215 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:29,216 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 76 states and 117 transitions. [2021-10-21 19:43:29,219 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 41 [2021-10-21 19:43:29,231 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 76 states to 71 states and 108 transitions. [2021-10-21 19:43:29,233 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-21 19:43:29,233 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-21 19:43:29,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 108 transitions. [2021-10-21 19:43:29,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:29,236 INFO L681 BuchiCegarLoop]: Abstraction has 71 states and 108 transitions. [2021-10-21 19:43:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states and 108 transitions. [2021-10-21 19:43:29,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-10-21 19:43:29,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-10-21 19:43:29,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 107 transitions. [2021-10-21 19:43:29,269 INFO L704 BuchiCegarLoop]: Abstraction has 70 states and 107 transitions. [2021-10-21 19:43:29,269 INFO L587 BuchiCegarLoop]: Abstraction has 70 states and 107 transitions. [2021-10-21 19:43:29,270 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-21 19:43:29,270 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 70 states and 107 transitions. [2021-10-21 19:43:29,271 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 41 [2021-10-21 19:43:29,272 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:29,272 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:29,272 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-21 19:43:29,272 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:29,273 INFO L791 eck$LassoCheckResult]: Stem: 277#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 278#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 295#L14 assume 0 == main_~i~0;main_~up~0 := 1; 296#L14-2 [2021-10-21 19:43:29,273 INFO L793 eck$LassoCheckResult]: Loop: 296#L14-2 assume !(main_~i~0 == main_~range~0); 325#L17-1 assume !(1 == main_~up~0); 323#L20-1 assume !(0 == main_~up~0); 320#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 319#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 318#L14 assume 0 == main_~i~0;main_~up~0 := 1; 296#L14-2 [2021-10-21 19:43:29,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:29,273 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-21 19:43:29,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:29,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999197203] [2021-10-21 19:43:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:29,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:29,280 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:29,284 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1514671824, now seen corresponding path program 1 times [2021-10-21 19:43:29,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:29,286 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830277419] [2021-10-21 19:43:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:29,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:29,291 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:29,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:29,300 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:29,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:29,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1819047602, now seen corresponding path program 1 times [2021-10-21 19:43:29,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:29,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559656270] [2021-10-21 19:43:29,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:29,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:29,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:29,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:29,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559656270] [2021-10-21 19:43:29,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559656270] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:29,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:29,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:29,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787774029] [2021-10-21 19:43:29,392 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:29,392 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:29,393 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:29,393 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:29,393 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:43:29,393 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,393 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:29,393 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:29,393 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration5_Loop [2021-10-21 19:43:29,393 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:29,393 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:29,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,417 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,604 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:29,604 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:43:29,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:29,610 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:29,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-21 19:43:29,612 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:29,612 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:29,646 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:29,647 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: [] [2021-10-21 19:43:29,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2021-10-21 19:43:29,685 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:29,686 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:29,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-21 19:43:29,692 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:29,692 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:29,714 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:29,714 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: [] [2021-10-21 19:43:29,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-21 19:43:29,741 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:29,742 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:29,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-21 19:43:29,743 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:29,743 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:29,757 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:29,757 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~range~0=3, ULTIMATE.start_main_~i~0=0} Honda state: {ULTIMATE.start_main_~range~0=3, ULTIMATE.start_main_~i~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 19:43:29,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:29,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:29,778 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:29,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-21 19:43:29,782 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:29,782 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:29,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-10-21 19:43:29,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:29,826 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:29,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-21 19:43:29,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:43:29,836 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:29,892 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:43:29,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:29,903 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:29,903 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:29,903 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:29,903 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:29,903 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:43:29,903 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:29,903 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:29,904 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:29,904 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration5_Loop [2021-10-21 19:43:29,904 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:29,904 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:29,905 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,910 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:29,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:30,063 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:30,063 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:43:30,063 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,064 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,074 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,083 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,083 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,084 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,084 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:30,087 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:30,087 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:30,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-21 19:43:30,103 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,128 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,131 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-21 19:43:30,133 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,141 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,141 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,141 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,141 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,141 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:30,143 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-21 19:43:30,143 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:30,153 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,192 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,202 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,212 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,212 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,212 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,212 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:30,218 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:30,218 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:30,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-21 19:43:30,246 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,279 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,285 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-21 19:43:30,292 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,292 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,292 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,292 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,292 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:30,294 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-21 19:43:30,294 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:30,302 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,322 INFO L490 LassoAnalysis]: Using template '2-nested'. [2021-10-21 19:43:30,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,323 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-21 19:43:30,325 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,332 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,333 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,333 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,333 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:30,336 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-21 19:43:30,336 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-21 19:43:30,353 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,374 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-10-21 19:43:30,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,382 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-21 19:43:30,384 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,391 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,391 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,392 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,392 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,392 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:30,395 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:30,395 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:30,418 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,446 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,446 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-21 19:43:30,448 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,457 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,457 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,457 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,457 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:30,460 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-21 19:43:30,460 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-21 19:43:30,477 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-10-21 19:43:30,497 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,504 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,535 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,544 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,545 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,545 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,545 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,545 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:30,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-21 19:43:30,548 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:30,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:30,566 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,604 INFO L490 LassoAnalysis]: Using template '3-nested'. [2021-10-21 19:43:30,605 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,610 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,613 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,625 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,626 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,626 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:30,629 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:30,630 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-21 19:43:30,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-21 19:43:30,654 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,690 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,695 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,705 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,705 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,705 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:30,708 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-21 19:43:30,708 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:30,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-21 19:43:30,726 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,764 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,766 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,776 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,776 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,776 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,776 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:30,780 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:30,780 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-21 19:43:30,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-21 19:43:30,802 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,839 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,846 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-21 19:43:30,855 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,855 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,855 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,855 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,856 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:30,858 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-21 19:43:30,858 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:30,870 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:30,908 INFO L490 LassoAnalysis]: Using template '4-nested'. [2021-10-21 19:43:30,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,910 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,916 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,925 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,926 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,926 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:30,926 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:30,930 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-21 19:43:30,930 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-21 19:43:30,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-21 19:43:30,958 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:30,983 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-21 19:43:30,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:30,984 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:30,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-21 19:43:30,986 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:30,994 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:30,994 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:30,994 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:30,994 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:30,994 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:30,998 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-21 19:43:30,998 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,013 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,054 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,056 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,065 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:31,066 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,066 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:31,066 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:31,070 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-21 19:43:31,070 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-21 19:43:31,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-21 19:43:31,101 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,137 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,138 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-21 19:43:31,141 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,149 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:31,149 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:31,149 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,149 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:31,149 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:31,154 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-21 19:43:31,154 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,179 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,202 INFO L490 LassoAnalysis]: Using template '2-phase'. [2021-10-21 19:43:31,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,203 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-21 19:43:31,205 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,213 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,213 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:31,213 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,213 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:31,213 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:31,216 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-21 19:43:31,216 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-21 19:43:31,234 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,253 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,254 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-21 19:43:31,255 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,263 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,263 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:31,263 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:31,263 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,263 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:31,264 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:31,266 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:31,267 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,298 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,329 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-21 19:43:31,331 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,338 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,338 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:31,339 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,339 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:31,339 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:31,341 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-21 19:43:31,341 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-21 19:43:31,353 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,376 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-21 19:43:31,378 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,386 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,386 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:31,387 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:31,387 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,387 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:31,387 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-21 19:43:31,389 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:31,389 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,418 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,455 INFO L490 LassoAnalysis]: Using template '3-phase'. [2021-10-21 19:43:31,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,456 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-21 19:43:31,459 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,468 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,468 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-21 19:43:31,468 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,468 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:31,468 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:31,473 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:31,473 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-21 19:43:31,502 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,540 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,541 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-21 19:43:31,545 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,552 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,553 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-21 19:43:31,553 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:31,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,553 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:31,553 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:31,557 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-21 19:43:31,558 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,584 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,622 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-21 19:43:31,628 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,636 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,636 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-21 19:43:31,636 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,636 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:31,636 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:31,640 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:31,641 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-21 19:43:31,678 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,716 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,727 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,736 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,736 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-21 19:43:31,736 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:31,737 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,737 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:31,737 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:31,740 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-21 19:43:31,741 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-21 19:43:31,778 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,870 INFO L490 LassoAnalysis]: Using template '4-phase'. [2021-10-21 19:43:31,870 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,873 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-21 19:43:31,876 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,884 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,884 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:31,884 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,884 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:31,884 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:31,888 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-21 19:43:31,888 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-21 19:43:31,914 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:31,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:31,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:31,947 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:31,951 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:31,961 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:31,961 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:31,961 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:31,961 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:31,961 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:31,961 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:31,967 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-21 19:43:31,967 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:31,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-21 19:43:32,002 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,032 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,033 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,034 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-21 19:43:32,041 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,041 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:32,042 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,042 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:32,042 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:32,045 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-21 19:43:32,045 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-21 19:43:32,067 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,087 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-21 19:43:32,089 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,096 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,097 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:32,097 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:32,097 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,097 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:32,097 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-21 19:43:32,101 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-21 19:43:32,101 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:32,126 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,146 INFO L490 LassoAnalysis]: Using template '2-lex'. [2021-10-21 19:43:32,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,147 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-21 19:43:32,150 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,157 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,157 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:32,158 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,158 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:32,158 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:32,160 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:32,160 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-21 19:43:32,166 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-10-21 19:43:32,186 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,187 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-21 19:43:32,189 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,198 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,198 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:32,199 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:32,199 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,199 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:32,199 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:32,201 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-21 19:43:32,201 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:32,217 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,239 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-21 19:43:32,241 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,248 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,248 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:32,248 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,248 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:32,248 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:32,251 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:32,252 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-21 19:43:32,270 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2021-10-21 19:43:32,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,292 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-21 19:43:32,293 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,301 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,301 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-21 19:43:32,301 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:32,301 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,301 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:32,301 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-21 19:43:32,303 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-21 19:43:32,303 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:32,330 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,363 INFO L490 LassoAnalysis]: Using template '3-lex'. [2021-10-21 19:43:32,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,371 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-21 19:43:32,372 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,380 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,380 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:32,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,380 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:32,380 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-21 19:43:32,384 INFO L401 nArgumentSynthesizer]: We have 18 Motzkin's Theorem applications. [2021-10-21 19:43:32,384 INFO L402 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2021-10-21 19:43:32,399 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2021-10-21 19:43:32,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,419 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-21 19:43:32,428 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,435 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,436 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:32,436 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:32,436 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,436 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:32,436 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-21 19:43:32,440 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:32,440 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:32,462 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Ended with exit code 0 [2021-10-21 19:43:32,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,489 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,491 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-21 19:43:32,498 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,498 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:32,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:32,499 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-21 19:43:32,503 INFO L401 nArgumentSynthesizer]: We have 18 Motzkin's Theorem applications. [2021-10-21 19:43:32,503 INFO L402 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2021-10-21 19:43:32,519 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,555 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,563 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:32,572 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-21 19:43:32,572 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-21 19:43:32,573 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:32,573 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:32,573 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:32,573 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-21 19:43:32,576 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-21 19:43:32,577 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:32,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-21 19:43:32,598 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:32,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:32,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:32,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:43:32,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:43:32,634 INFO L87 Difference]: Start difference. First operand 70 states and 107 transitions. cyclomatic complexity: 41 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:32,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:32,658 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-10-21 19:43:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:43:32,659 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 71 transitions. [2021-10-21 19:43:32,660 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2021-10-21 19:43:32,661 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 50 states and 69 transitions. [2021-10-21 19:43:32,661 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2021-10-21 19:43:32,661 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2021-10-21 19:43:32,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 69 transitions. [2021-10-21 19:43:32,662 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:32,662 INFO L681 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2021-10-21 19:43:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states and 69 transitions. [2021-10-21 19:43:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-21 19:43:32,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-21 19:43:32,667 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-21 19:43:32,667 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-21 19:43:32,667 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-21 19:43:32,667 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 57 transitions. [2021-10-21 19:43:32,668 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-21 19:43:32,668 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:32,668 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:32,669 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-21 19:43:32,669 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:32,669 INFO L791 eck$LassoCheckResult]: Stem: 407#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 408#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 429#L14 assume 0 == main_~i~0;main_~up~0 := 1; 438#L14-2 assume !(main_~i~0 == main_~range~0); 417#L17-1 [2021-10-21 19:43:32,669 INFO L793 eck$LassoCheckResult]: Loop: 417#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 418#L20-1 assume !(0 == main_~up~0); 432#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 442#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 447#L14 assume 0 == main_~i~0;main_~up~0 := 1; 444#L14-2 assume !(main_~i~0 == main_~range~0); 417#L17-1 [2021-10-21 19:43:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:32,670 INFO L82 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 1 times [2021-10-21 19:43:32,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:32,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965522383] [2021-10-21 19:43:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:32,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:32,682 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:32,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:32,693 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:32,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:32,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1634880532, now seen corresponding path program 1 times [2021-10-21 19:43:32,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:32,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084742963] [2021-10-21 19:43:32,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:32,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:32,699 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:32,717 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:32,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:32,718 INFO L82 PathProgramCache]: Analyzing trace with hash 498642533, now seen corresponding path program 1 times [2021-10-21 19:43:32,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:32,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7930515] [2021-10-21 19:43:32,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:32,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:32,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:32,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7930515] [2021-10-21 19:43:32,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7930515] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:32,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:32,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:43:32,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801718136] [2021-10-21 19:43:32,831 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:32,832 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:32,832 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:32,832 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:32,832 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:43:32,832 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,832 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:32,832 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:32,832 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration6_Loop [2021-10-21 19:43:32,832 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:32,832 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:32,835 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:32,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:32,842 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:32,845 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:32,972 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:32,972 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:43:32,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:32,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:32,978 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:32,983 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:32,983 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:33,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-21 19:43:33,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:33,015 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: [] [2021-10-21 19:43:33,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,054 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:33,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:33,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-21 19:43:33,082 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:33,082 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: [] [2021-10-21 19:43:33,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,116 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,118 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:33,118 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:33,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-21 19:43:33,137 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:33,137 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-21 19:43:33,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Ended with exit code 0 [2021-10-21 19:43:33,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,169 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-21 19:43:33,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:33,170 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:33,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-21 19:43:33,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,224 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-21 19:43:33,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:43:33,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:33,412 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:43:33,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,415 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:33,415 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:33,415 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:33,415 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:33,415 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:43:33,415 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,415 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:33,415 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:33,415 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration6_Loop [2021-10-21 19:43:33,416 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:33,416 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:33,416 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:33,424 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:33,438 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:33,440 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:33,560 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:33,560 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:43:33,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,562 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,569 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:33,578 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:33,578 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:33,578 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:33,578 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:33,580 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:33,580 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:33,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-21 19:43:33,594 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:33,618 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-21 19:43:33,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,619 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-21 19:43:33,620 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:33,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:33,628 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:33,628 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:33,628 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:33,628 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:33,631 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:43:33,631 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:33,648 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:33,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-21 19:43:33,668 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,669 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-21 19:43:33,671 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:33,679 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:33,679 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:33,679 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:33,679 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:33,680 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:33,680 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:33,695 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:33,723 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Ended with exit code 0 [2021-10-21 19:43:33,723 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,724 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-21 19:43:33,726 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:33,733 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:33,733 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:33,733 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:33,733 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:33,733 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:33,735 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-21 19:43:33,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:33,745 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:43:33,772 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:43:33,772 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:43:33,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:33,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:33,779 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:33,782 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:43:33,783 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:43:33,783 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:43:33,783 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-21 19:43:33,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-21 19:43:33,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:33,816 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:43:33,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:33,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:33,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:43:33,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:33,917 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 [2021-10-21 19:43:33,917 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 57 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:33,972 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 57 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 114 states and 153 transitions. Complement of second has 7 states. [2021-10-21 19:43:33,972 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 [2021-10-21 19:43:33,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2021-10-21 19:43:33,973 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 4 letters. Loop has 6 letters. [2021-10-21 19:43:33,973 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:33,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-21 19:43:33,974 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:33,974 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 4 letters. Loop has 12 letters. [2021-10-21 19:43:33,974 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:33,975 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 114 states and 153 transitions. [2021-10-21 19:43:33,978 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 42 [2021-10-21 19:43:33,979 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 114 states to 108 states and 144 transitions. [2021-10-21 19:43:33,980 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 62 [2021-10-21 19:43:33,980 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 67 [2021-10-21 19:43:33,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 144 transitions. [2021-10-21 19:43:33,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:33,980 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 144 transitions. [2021-10-21 19:43:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 144 transitions. [2021-10-21 19:43:33,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-10-21 19:43:33,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 92 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:33,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2021-10-21 19:43:33,990 INFO L704 BuchiCegarLoop]: Abstraction has 93 states and 128 transitions. [2021-10-21 19:43:33,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:33,991 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:34,019 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2021-10-21 19:43:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:43:34,019 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 111 states and 142 transitions. [2021-10-21 19:43:34,022 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 50 [2021-10-21 19:43:34,023 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 111 states to 92 states and 118 transitions. [2021-10-21 19:43:34,023 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 67 [2021-10-21 19:43:34,024 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 67 [2021-10-21 19:43:34,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 118 transitions. [2021-10-21 19:43:34,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:34,024 INFO L681 BuchiCegarLoop]: Abstraction has 92 states and 118 transitions. [2021-10-21 19:43:34,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states and 118 transitions. [2021-10-21 19:43:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 41. [2021-10-21 19:43:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:34,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-10-21 19:43:34,029 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-10-21 19:43:34,030 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-10-21 19:43:34,030 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-21 19:43:34,030 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 55 transitions. [2021-10-21 19:43:34,031 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-21 19:43:34,031 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:34,031 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:34,031 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-21 19:43:34,031 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:34,032 INFO L791 eck$LassoCheckResult]: Stem: 823#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 824#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 843#L14 assume 0 == main_~i~0;main_~up~0 := 1; 857#L14-2 assume !(main_~i~0 == main_~range~0); 833#L17-1 [2021-10-21 19:43:34,032 INFO L793 eck$LassoCheckResult]: Loop: 833#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 834#L20-1 assume !(0 == main_~up~0); 848#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 858#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 863#L14 assume !(0 == main_~i~0); 860#L14-2 assume !(main_~i~0 == main_~range~0); 833#L17-1 [2021-10-21 19:43:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:34,032 INFO L82 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 2 times [2021-10-21 19:43:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:34,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115674475] [2021-10-21 19:43:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:34,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:34,037 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:34,041 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:34,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:34,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1634880594, now seen corresponding path program 1 times [2021-10-21 19:43:34,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:34,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634059676] [2021-10-21 19:43:34,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:34,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:34,046 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:34,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:34,052 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:34,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:34,053 INFO L82 PathProgramCache]: Analyzing trace with hash 498642595, now seen corresponding path program 1 times [2021-10-21 19:43:34,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:34,053 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648284551] [2021-10-21 19:43:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:34,053 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:34,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:34,059 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:34,065 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:34,121 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:34,121 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:34,122 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:34,122 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:34,122 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:43:34,122 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:34,122 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:34,122 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:34,122 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-10-21 19:43:34,122 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:34,122 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:34,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,136 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,139 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,142 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,259 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:34,259 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:43:34,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:34,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:34,266 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:34,271 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:34,271 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:34,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2021-10-21 19:43:34,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:34,332 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:34,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:34,333 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:34,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:43:34,340 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:34,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2021-10-21 19:43:34,742 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:43:34,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:34,746 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:34,746 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:34,746 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:34,746 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:34,746 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:43:34,746 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:34,747 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:34,747 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:34,747 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-10-21 19:43:34,747 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:34,747 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:34,748 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,761 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,764 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,767 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:34,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:34,919 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:34,919 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:43:34,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:34,921 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:34,927 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:34,938 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:34,938 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:34,938 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:34,938 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:34,938 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:34,940 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-21 19:43:34,940 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:34,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2021-10-21 19:43:34,952 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:43:34,957 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:43:34,957 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-21 19:43:34,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:34,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:34,959 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:34,960 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:43:34,961 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:43:34,961 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:43:34,961 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~range~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-21 19:43:34,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2021-10-21 19:43:34,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:34,989 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:43:35,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:35,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:35,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:35,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:35,101 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-21 19:43:35,101 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 55 transitions. cyclomatic complexity: 16 Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:35,134 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 55 transitions. cyclomatic complexity: 16. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 90 states and 115 transitions. Complement of second has 7 states. [2021-10-21 19:43:35,134 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 [2021-10-21 19:43:35,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-10-21 19:43:35,135 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 6 letters. [2021-10-21 19:43:35,135 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:35,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-21 19:43:35,136 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:35,136 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 12 letters. [2021-10-21 19:43:35,137 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:35,137 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 90 states and 115 transitions. [2021-10-21 19:43:35,138 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-21 19:43:35,140 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 90 states to 77 states and 98 transitions. [2021-10-21 19:43:35,140 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2021-10-21 19:43:35,140 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2021-10-21 19:43:35,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 98 transitions. [2021-10-21 19:43:35,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:35,141 INFO L681 BuchiCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-10-21 19:43:35,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 98 transitions. [2021-10-21 19:43:35,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-21 19:43:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 71 states have (on average 1.295774647887324) internal successors, (92), 70 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:35,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-10-21 19:43:35,147 INFO L704 BuchiCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-10-21 19:43:35,147 INFO L587 BuchiCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-10-21 19:43:35,147 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-21 19:43:35,147 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 92 transitions. [2021-10-21 19:43:35,148 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-21 19:43:35,148 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:35,149 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:35,149 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:35,149 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:35,149 INFO L791 eck$LassoCheckResult]: Stem: 1009#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 1010#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1067#L14 assume !(0 == main_~i~0); 1068#L14-2 assume !(main_~i~0 == main_~range~0); 1021#L17-1 assume !(1 == main_~up~0); 1022#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1058#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 1060#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1078#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1077#L14-2 assume !(main_~i~0 == main_~range~0); 1076#L17-1 [2021-10-21 19:43:35,150 INFO L793 eck$LassoCheckResult]: Loop: 1076#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1075#L20-1 assume !(0 == main_~up~0); 1023#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1024#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1044#L14 assume !(0 == main_~i~0); 1042#L14-2 assume !(main_~i~0 == main_~range~0); 1076#L17-1 [2021-10-21 19:43:35,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:35,150 INFO L82 PathProgramCache]: Analyzing trace with hash -255352415, now seen corresponding path program 1 times [2021-10-21 19:43:35,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:35,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513499335] [2021-10-21 19:43:35,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,151 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:35,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:35,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513499335] [2021-10-21 19:43:35,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513499335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:35,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916873091] [2021-10-21 19:43:35,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,176 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-21 19:43:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:35,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:43:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:35,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916873091] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:35,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:35,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-21 19:43:35,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519916188] [2021-10-21 19:43:35,278 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:35,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:35,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1634880594, now seen corresponding path program 2 times [2021-10-21 19:43:35,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:35,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72432010] [2021-10-21 19:43:35,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:35,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:35,289 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:35,305 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:35,361 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:35,361 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:35,361 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:35,361 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:35,361 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:43:35,362 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,362 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:35,362 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:35,362 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-10-21 19:43:35,362 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:35,362 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:35,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,368 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,370 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,473 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:35,473 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:43:35,473 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,478 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,487 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:35,487 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:35,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2021-10-21 19:43:35,510 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:35,511 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: [] [2021-10-21 19:43:35,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:35,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,544 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,546 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:35,546 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:35,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2021-10-21 19:43:35,569 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:35,569 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: [] [2021-10-21 19:43:35,589 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Ended with exit code 0 [2021-10-21 19:43:35,589 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,590 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2021-10-21 19:43:35,591 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:35,591 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:35,604 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-21 19:43:35,604 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: [] [2021-10-21 19:43:35,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:35,623 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,624 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2021-10-21 19:43:35,626 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:35,626 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:35,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Ended with exit code 0 [2021-10-21 19:43:35,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:35,654 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:35,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2021-10-21 19:43:35,656 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:43:35,656 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:35,904 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:43:35,906 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:35,906 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:35,906 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:35,906 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:35,907 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:35,907 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:43:35,907 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:35,907 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:35,907 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:35,907 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-10-21 19:43:35,907 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:35,907 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:35,908 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,920 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:35,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:36,055 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:36,055 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:43:36,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:36,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,058 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2021-10-21 19:43:36,059 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:36,067 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:36,067 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:36,067 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:36,067 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:36,070 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:36,070 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:36,084 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:36,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:36,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:36,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,106 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Waiting until timeout for monitored process [2021-10-21 19:43:36,107 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:36,114 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:36,114 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:36,114 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:36,115 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:36,115 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:36,115 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:43:36,115 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:36,142 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:36,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:36,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,178 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,187 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:36,196 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:36,196 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:36,196 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:36,196 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:36,198 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-21 19:43:36,198 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-21 19:43:36,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Waiting until timeout for monitored process [2021-10-21 19:43:36,214 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-21 19:43:36,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Ended with exit code 0 [2021-10-21 19:43:36,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:36,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,236 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Waiting until timeout for monitored process [2021-10-21 19:43:36,238 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:36,246 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:36,246 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:36,246 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:36,246 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-21 19:43:36,246 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:36,248 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-21 19:43:36,248 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:36,258 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:43:36,266 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-21 19:43:36,266 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:43:36,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:36,267 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:36,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Waiting until timeout for monitored process [2021-10-21 19:43:36,268 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:43:36,268 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:43:36,268 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:43:36,268 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~range~0) = -1*ULTIMATE.start_main_~i~0 + 1*ULTIMATE.start_main_~range~0 Supporting invariants [] [2021-10-21 19:43:36,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:36,289 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:43:36,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:36,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:36,416 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 [2021-10-21 19:43:36,416 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26 Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,455 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 95 states and 121 transitions. Complement of second has 7 states. [2021-10-21 19:43:36,456 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 [2021-10-21 19:43:36,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-10-21 19:43:36,457 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-21 19:43:36,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:36,458 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:43:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:36,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:36,575 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-21 19:43:36,575 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26 Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,637 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 124 states and 157 transitions. Complement of second has 9 states. [2021-10-21 19:43:36,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-21 19:43:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2021-10-21 19:43:36,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-21 19:43:36,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:36,641 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-21 19:43:36,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:36,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:36,743 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 3 loop predicates [2021-10-21 19:43:36,744 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26 Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,791 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 112 states and 146 transitions. Complement of second has 8 states. [2021-10-21 19:43:36,792 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 [2021-10-21 19:43:36,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 26 transitions. [2021-10-21 19:43:36,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-21 19:43:36,793 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:36,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 16 letters. Loop has 6 letters. [2021-10-21 19:43:36,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:36,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 10 letters. Loop has 12 letters. [2021-10-21 19:43:36,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:36,795 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 112 states and 146 transitions. [2021-10-21 19:43:36,798 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 35 [2021-10-21 19:43:36,799 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 112 states to 84 states and 108 transitions. [2021-10-21 19:43:36,799 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-21 19:43:36,800 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2021-10-21 19:43:36,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 108 transitions. [2021-10-21 19:43:36,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:36,800 INFO L681 BuchiCegarLoop]: Abstraction has 84 states and 108 transitions. [2021-10-21 19:43:36,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states and 108 transitions. [2021-10-21 19:43:36,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2021-10-21 19:43:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 48 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2021-10-21 19:43:36,805 INFO L704 BuchiCegarLoop]: Abstraction has 49 states and 66 transitions. [2021-10-21 19:43:36,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:36,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:36,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:36,814 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:36,859 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2021-10-21 19:43:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:43:36,860 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 154 transitions. [2021-10-21 19:43:36,861 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2021-10-21 19:43:36,865 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 117 states and 152 transitions. [2021-10-21 19:43:36,865 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-10-21 19:43:36,867 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-10-21 19:43:36,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 152 transitions. [2021-10-21 19:43:36,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:36,868 INFO L681 BuchiCegarLoop]: Abstraction has 117 states and 152 transitions. [2021-10-21 19:43:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 152 transitions. [2021-10-21 19:43:36,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-10-21 19:43:36,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 96 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2021-10-21 19:43:36,880 INFO L704 BuchiCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-10-21 19:43:36,880 INFO L587 BuchiCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-10-21 19:43:36,880 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-21 19:43:36,880 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 128 transitions. [2021-10-21 19:43:36,881 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2021-10-21 19:43:36,881 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:36,881 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:36,882 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-21 19:43:36,882 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-21 19:43:36,882 INFO L791 eck$LassoCheckResult]: Stem: 1801#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 1802#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1804#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1821#L14-2 assume !(main_~i~0 == main_~range~0); 1822#L17-1 [2021-10-21 19:43:36,883 INFO L793 eck$LassoCheckResult]: Loop: 1822#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1853#L20-1 assume !(0 == main_~up~0); 1854#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1869#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1846#L14 assume !(0 == main_~i~0); 1845#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 1839#L17-1 assume !(1 == main_~up~0); 1844#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1842#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1843#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1882#L14 assume !(0 == main_~i~0); 1838#L14-2 assume !(main_~i~0 == main_~range~0); 1837#L17-1 assume !(1 == main_~up~0); 1836#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1834#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1835#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1840#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1841#L14-2 assume !(main_~i~0 == main_~range~0); 1822#L17-1 [2021-10-21 19:43:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 3 times [2021-10-21 19:43:36,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:36,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109322765] [2021-10-21 19:43:36,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:36,884 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:36,889 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:36,893 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:36,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1416950548, now seen corresponding path program 1 times [2021-10-21 19:43:36,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:36,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664289365] [2021-10-21 19:43:36,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:36,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:36,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:37,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:37,100 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:37,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:37,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664289365] [2021-10-21 19:43:37,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664289365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:37,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960026303] [2021-10-21 19:43:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:37,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:37,103 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:37,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-21 19:43:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:43:37,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:37,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960026303] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:37,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:37,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-10-21 19:43:37,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160054744] [2021-10-21 19:43:37,316 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-21 19:43:37,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:37,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:43:37,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:43:37,317 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. cyclomatic complexity: 35 Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:37,541 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-10-21 19:43:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:43:37,541 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 111 transitions. [2021-10-21 19:43:37,542 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-21 19:43:37,543 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 93 states and 104 transitions. [2021-10-21 19:43:37,543 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-21 19:43:37,544 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2021-10-21 19:43:37,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 104 transitions. [2021-10-21 19:43:37,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:37,544 INFO L681 BuchiCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-10-21 19:43:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 104 transitions. [2021-10-21 19:43:37,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-10-21 19:43:37,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 84 states have (on average 1.130952380952381) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-10-21 19:43:37,549 INFO L704 BuchiCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-10-21 19:43:37,549 INFO L587 BuchiCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-10-21 19:43:37,549 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-21 19:43:37,549 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 84 states and 95 transitions. [2021-10-21 19:43:37,550 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-21 19:43:37,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:37,550 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:37,551 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,551 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,551 INFO L791 eck$LassoCheckResult]: Stem: 2072#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2073#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2093#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2092#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2086#L17-1 assume !(1 == main_~up~0); 2080#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2081#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2083#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2132#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2121#L14-2 [2021-10-21 19:43:37,551 INFO L793 eck$LassoCheckResult]: Loop: 2121#L14-2 assume !(main_~i~0 == main_~range~0); 2120#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2119#L20-1 assume !(0 == main_~up~0); 2118#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2117#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2116#L14 assume !(0 == main_~i~0); 2111#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2115#L17-1 assume !(1 == main_~up~0); 2146#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2144#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2142#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2141#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2121#L14-2 [2021-10-21 19:43:37,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1761729718, now seen corresponding path program 1 times [2021-10-21 19:43:37,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656056721] [2021-10-21 19:43:37,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,552 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:37,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:37,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656056721] [2021-10-21 19:43:37,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656056721] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:37,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:37,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:43:37,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117326114] [2021-10-21 19:43:37,604 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:37,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 2 times [2021-10-21 19:43:37,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741202382] [2021-10-21 19:43:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:37,615 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:37,624 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:37,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:37,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:43:37,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:43:37,693 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. cyclomatic complexity: 16 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:37,728 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-21 19:43:37,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:43:37,729 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 94 transitions. [2021-10-21 19:43:37,730 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-21 19:43:37,731 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 83 states and 93 transitions. [2021-10-21 19:43:37,731 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-10-21 19:43:37,731 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-10-21 19:43:37,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 93 transitions. [2021-10-21 19:43:37,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:37,732 INFO L681 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-21 19:43:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 93 transitions. [2021-10-21 19:43:37,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-21 19:43:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-10-21 19:43:37,744 INFO L704 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-21 19:43:37,744 INFO L587 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-21 19:43:37,744 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-21 19:43:37,744 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 83 states and 93 transitions. [2021-10-21 19:43:37,745 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-21 19:43:37,745 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:37,745 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:37,746 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,746 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,746 INFO L791 eck$LassoCheckResult]: Stem: 2249#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2250#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2267#L14 assume !(0 == main_~i~0); 2275#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2263#L17-1 assume !(1 == main_~up~0); 2257#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2258#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2259#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2331#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2317#L14-2 [2021-10-21 19:43:37,746 INFO L793 eck$LassoCheckResult]: Loop: 2317#L14-2 assume !(main_~i~0 == main_~range~0); 2330#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2329#L20-1 assume !(0 == main_~up~0); 2328#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2327#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2326#L14 assume !(0 == main_~i~0); 2285#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2325#L17-1 assume !(1 == main_~up~0); 2323#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2321#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2319#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2316#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2317#L14-2 [2021-10-21 19:43:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -758230216, now seen corresponding path program 1 times [2021-10-21 19:43:37,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344315186] [2021-10-21 19:43:37,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:37,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:37,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344315186] [2021-10-21 19:43:37,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344315186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:37,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804279670] [2021-10-21 19:43:37,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,773 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:37,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:37,774 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:37,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-21 19:43:37,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:37,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:43:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:37,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:37,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804279670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:37,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:37,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-21 19:43:37,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579838080] [2021-10-21 19:43:37,874 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:37,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,875 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 3 times [2021-10-21 19:43:37,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41894753] [2021-10-21 19:43:37,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:37,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:37,881 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:37,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:37,885 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:37,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:37,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:43:37,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:43:37,945 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:37,989 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-10-21 19:43:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:43:37,990 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 85 transitions. [2021-10-21 19:43:37,992 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:37,993 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 75 states and 83 transitions. [2021-10-21 19:43:37,993 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-21 19:43:37,993 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-21 19:43:37,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 83 transitions. [2021-10-21 19:43:37,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:37,993 INFO L681 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-21 19:43:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states and 83 transitions. [2021-10-21 19:43:37,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-21 19:43:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:37,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-10-21 19:43:37,995 INFO L704 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-21 19:43:37,995 INFO L587 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-21 19:43:37,995 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-21 19:43:37,995 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 75 states and 83 transitions. [2021-10-21 19:43:37,996 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:37,996 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:37,996 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:37,996 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1] [2021-10-21 19:43:37,997 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:37,997 INFO L791 eck$LassoCheckResult]: Stem: 2445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2446#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2463#L14 assume !(0 == main_~i~0); 2471#L14-2 assume !(main_~i~0 == main_~range~0); 2470#L17-1 assume !(1 == main_~up~0); 2469#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2466#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2449#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2450#L14 assume !(0 == main_~i~0); 2460#L14-2 assume !(main_~i~0 == main_~range~0); 2462#L17-1 assume !(1 == main_~up~0); 2495#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2491#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2492#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2485#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2486#L14-2 [2021-10-21 19:43:37,997 INFO L793 eck$LassoCheckResult]: Loop: 2486#L14-2 assume !(main_~i~0 == main_~range~0); 2506#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2505#L20-1 assume !(0 == main_~up~0); 2504#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2503#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2501#L14 assume !(0 == main_~i~0); 2499#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2497#L17-1 assume !(1 == main_~up~0); 2496#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2493#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2488#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2489#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2486#L14-2 [2021-10-21 19:43:37,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:37,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1377251387, now seen corresponding path program 2 times [2021-10-21 19:43:37,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:37,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693922026] [2021-10-21 19:43:37,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:37,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:38,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:38,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693922026] [2021-10-21 19:43:38,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693922026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986830243] [2021-10-21 19:43:38,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:38,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:38,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:38,056 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:38,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-21 19:43:38,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:38,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:38,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:43:38,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:38,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986830243] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:38,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-21 19:43:38,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766747223] [2021-10-21 19:43:38,167 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 4 times [2021-10-21 19:43:38,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:38,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840670118] [2021-10-21 19:43:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:38,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:38,172 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:38,193 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:38,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:43:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:43:38,244 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. cyclomatic complexity: 12 Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:38,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:38,296 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-10-21 19:43:38,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:43:38,296 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 99 states and 107 transitions. [2021-10-21 19:43:38,300 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:38,301 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 99 states to 97 states and 105 transitions. [2021-10-21 19:43:38,302 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2021-10-21 19:43:38,302 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2021-10-21 19:43:38,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 105 transitions. [2021-10-21 19:43:38,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:38,306 INFO L681 BuchiCegarLoop]: Abstraction has 97 states and 105 transitions. [2021-10-21 19:43:38,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 105 transitions. [2021-10-21 19:43:38,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2021-10-21 19:43:38,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:38,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-10-21 19:43:38,312 INFO L704 BuchiCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-21 19:43:38,313 INFO L587 BuchiCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-21 19:43:38,313 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-21 19:43:38,313 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 95 transitions. [2021-10-21 19:43:38,314 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:38,314 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:38,314 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:38,316 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 3, 1, 1] [2021-10-21 19:43:38,316 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:38,316 INFO L791 eck$LassoCheckResult]: Stem: 2673#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2674#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2712#L14 assume !(0 == main_~i~0); 2710#L14-2 assume !(main_~i~0 == main_~range~0); 2709#L17-1 assume !(1 == main_~up~0); 2708#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2705#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2706#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2690#L14 assume !(0 == main_~i~0); 2691#L14-2 assume !(main_~i~0 == main_~range~0); 2741#L17-1 assume !(1 == main_~up~0); 2681#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2682#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2677#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2678#L14 assume !(0 == main_~i~0); 2692#L14-2 assume !(main_~i~0 == main_~range~0); 2685#L17-1 assume !(1 == main_~up~0); 2686#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2727#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2728#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2721#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2722#L14-2 [2021-10-21 19:43:38,317 INFO L793 eck$LassoCheckResult]: Loop: 2722#L14-2 assume !(main_~i~0 == main_~range~0); 2717#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2718#L20-1 assume !(0 == main_~up~0); 2736#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2735#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2734#L14 assume !(0 == main_~i~0); 2733#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2732#L17-1 assume !(1 == main_~up~0); 2731#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2729#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2724#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2725#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2722#L14-2 [2021-10-21 19:43:38,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:38,317 INFO L82 PathProgramCache]: Analyzing trace with hash 237666774, now seen corresponding path program 3 times [2021-10-21 19:43:38,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:38,318 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177223013] [2021-10-21 19:43:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:38,318 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:38,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,393 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:38,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:38,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177223013] [2021-10-21 19:43:38,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177223013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134455232] [2021-10-21 19:43:38,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:43:38,394 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:38,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:38,395 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:38,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-21 19:43:38,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:43:38,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:38,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:38,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:38,558 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:38,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134455232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:38,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-21 19:43:38,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663899998] [2021-10-21 19:43:38,559 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:38,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:38,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 5 times [2021-10-21 19:43:38,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:38,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388535500] [2021-10-21 19:43:38,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:38,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:38,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:38,565 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:38,569 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:38,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:38,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:43:38,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-21 19:43:38,624 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. cyclomatic complexity: 12 Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:38,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:38,765 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-10-21 19:43:38,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:43:38,766 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 131 states and 139 transitions. [2021-10-21 19:43:38,767 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:38,768 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 131 states to 127 states and 135 transitions. [2021-10-21 19:43:38,769 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-21 19:43:38,769 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-21 19:43:38,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 135 transitions. [2021-10-21 19:43:38,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:38,769 INFO L681 BuchiCegarLoop]: Abstraction has 127 states and 135 transitions. [2021-10-21 19:43:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 135 transitions. [2021-10-21 19:43:38,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2021-10-21 19:43:38,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:38,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-10-21 19:43:38,773 INFO L704 BuchiCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-10-21 19:43:38,773 INFO L587 BuchiCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-10-21 19:43:38,773 INFO L425 BuchiCegarLoop]: ======== Iteration 14============ [2021-10-21 19:43:38,773 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 119 transitions. [2021-10-21 19:43:38,774 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:38,774 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:38,775 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:38,776 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 1, 1] [2021-10-21 19:43:38,776 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:38,776 INFO L791 eck$LassoCheckResult]: Stem: 2978#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2979#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3014#L14 assume !(0 == main_~i~0); 3012#L14-2 assume !(main_~i~0 == main_~range~0); 3011#L17-1 assume !(1 == main_~up~0); 3010#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3008#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2982#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2983#L14 assume !(0 == main_~i~0); 2995#L14-2 assume !(main_~i~0 == main_~range~0); 2990#L17-1 assume !(1 == main_~up~0); 2991#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3016#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3072#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3071#L14 assume !(0 == main_~i~0); 3070#L14-2 assume !(main_~i~0 == main_~range~0); 3069#L17-1 assume !(1 == main_~up~0); 3068#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3067#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3066#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3065#L14 assume !(0 == main_~i~0); 3064#L14-2 assume !(main_~i~0 == main_~range~0); 3063#L17-1 assume !(1 == main_~up~0); 3062#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3061#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3030#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3058#L14 assume !(0 == main_~i~0); 3044#L14-2 assume !(main_~i~0 == main_~range~0); 3042#L17-1 assume !(1 == main_~up~0); 3034#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3029#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3031#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3023#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3024#L14-2 [2021-10-21 19:43:38,776 INFO L793 eck$LassoCheckResult]: Loop: 3024#L14-2 assume !(main_~i~0 == main_~range~0); 3019#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3020#L20-1 assume !(0 == main_~up~0); 3040#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3039#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3038#L14 assume !(0 == main_~i~0); 3037#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 3036#L17-1 assume !(1 == main_~up~0); 3035#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3032#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3026#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3027#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3024#L14-2 [2021-10-21 19:43:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash 170050488, now seen corresponding path program 4 times [2021-10-21 19:43:38,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:38,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190317911] [2021-10-21 19:43:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:38,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:38,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:38,845 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:38,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:38,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190317911] [2021-10-21 19:43:38,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190317911] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:38,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462661815] [2021-10-21 19:43:38,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:43:38,846 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:38,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:38,855 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:38,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-21 19:43:38,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:43:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:43:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:39,063 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:39,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462661815] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:39,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:39,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-21 19:43:39,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034575738] [2021-10-21 19:43:39,064 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:39,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:39,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 6 times [2021-10-21 19:43:39,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:39,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413704624] [2021-10-21 19:43:39,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:39,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:39,070 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:39,074 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:39,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:39,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-21 19:43:39,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-21 19:43:39,144 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:39,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:39,264 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-10-21 19:43:39,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:43:39,265 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 167 states and 175 transitions. [2021-10-21 19:43:39,267 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:39,268 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 167 states to 163 states and 171 transitions. [2021-10-21 19:43:39,268 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 101 [2021-10-21 19:43:39,269 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 101 [2021-10-21 19:43:39,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 171 transitions. [2021-10-21 19:43:39,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:39,269 INFO L681 BuchiCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-10-21 19:43:39,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 171 transitions. [2021-10-21 19:43:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 135. [2021-10-21 19:43:39,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 135 states have (on average 1.0592592592592593) internal successors, (143), 134 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:39,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2021-10-21 19:43:39,274 INFO L704 BuchiCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-10-21 19:43:39,274 INFO L587 BuchiCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-10-21 19:43:39,274 INFO L425 BuchiCegarLoop]: ======== Iteration 15============ [2021-10-21 19:43:39,274 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 135 states and 143 transitions. [2021-10-21 19:43:39,276 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:39,276 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:39,276 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:39,283 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 7, 7, 7, 7, 1, 1] [2021-10-21 19:43:39,284 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:39,286 INFO L791 eck$LassoCheckResult]: Stem: 3377#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 3378#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3413#L14 assume !(0 == main_~i~0); 3411#L14-2 assume !(main_~i~0 == main_~range~0); 3410#L17-1 assume !(1 == main_~up~0); 3409#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3406#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3407#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3392#L14 assume !(0 == main_~i~0); 3393#L14-2 assume !(main_~i~0 == main_~range~0); 3388#L17-1 assume !(1 == main_~up~0); 3389#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3415#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3476#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3475#L14 assume !(0 == main_~i~0); 3474#L14-2 assume !(main_~i~0 == main_~range~0); 3473#L17-1 assume !(1 == main_~up~0); 3472#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3471#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3470#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3469#L14 assume !(0 == main_~i~0); 3468#L14-2 assume !(main_~i~0 == main_~range~0); 3467#L17-1 assume !(1 == main_~up~0); 3466#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3465#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3464#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3463#L14 assume !(0 == main_~i~0); 3462#L14-2 assume !(main_~i~0 == main_~range~0); 3461#L17-1 assume !(1 == main_~up~0); 3460#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3459#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3458#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3457#L14 assume !(0 == main_~i~0); 3456#L14-2 assume !(main_~i~0 == main_~range~0); 3455#L17-1 assume !(1 == main_~up~0); 3454#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3453#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3428#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3444#L14 assume !(0 == main_~i~0); 3442#L14-2 assume !(main_~i~0 == main_~range~0); 3440#L17-1 assume !(1 == main_~up~0); 3432#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3427#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3429#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3422#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3423#L14-2 [2021-10-21 19:43:39,286 INFO L793 eck$LassoCheckResult]: Loop: 3423#L14-2 assume !(main_~i~0 == main_~range~0); 3418#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3419#L20-1 assume !(0 == main_~up~0); 3439#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3438#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3437#L14 assume !(0 == main_~i~0); 3436#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 3435#L17-1 assume !(1 == main_~up~0); 3434#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3431#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3425#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3426#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3423#L14-2 [2021-10-21 19:43:39,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:39,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1502788966, now seen corresponding path program 5 times [2021-10-21 19:43:39,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:39,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044773851] [2021-10-21 19:43:39,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:39,287 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:39,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:39,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044773851] [2021-10-21 19:43:39,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044773851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:39,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440635390] [2021-10-21 19:43:39,383 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:43:39,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:39,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:39,385 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:39,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-21 19:43:39,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-21 19:43:39,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:39,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:43:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:39,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440635390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:39,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:39,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-10-21 19:43:39,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733527794] [2021-10-21 19:43:39,669 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:39,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:39,670 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 7 times [2021-10-21 19:43:39,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:39,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149916077] [2021-10-21 19:43:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:39,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:39,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:39,676 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:39,684 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:39,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:39,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:43:39,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:43:39,740 INFO L87 Difference]: Start difference. First operand 135 states and 143 transitions. cyclomatic complexity: 12 Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:39,909 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2021-10-21 19:43:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:43:39,910 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 203 states and 211 transitions. [2021-10-21 19:43:39,912 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:39,914 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 203 states to 199 states and 207 transitions. [2021-10-21 19:43:39,914 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 125 [2021-10-21 19:43:39,915 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 125 [2021-10-21 19:43:39,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 207 transitions. [2021-10-21 19:43:39,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:39,915 INFO L681 BuchiCegarLoop]: Abstraction has 199 states and 207 transitions. [2021-10-21 19:43:39,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states and 207 transitions. [2021-10-21 19:43:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2021-10-21 19:43:39,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 159 states have (on average 1.050314465408805) internal successors, (167), 158 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2021-10-21 19:43:39,920 INFO L704 BuchiCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-10-21 19:43:39,920 INFO L587 BuchiCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-10-21 19:43:39,920 INFO L425 BuchiCegarLoop]: ======== Iteration 16============ [2021-10-21 19:43:39,921 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 159 states and 167 transitions. [2021-10-21 19:43:39,922 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:39,922 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:39,922 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:39,923 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 9, 9, 9, 9, 1, 1] [2021-10-21 19:43:39,924 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:39,924 INFO L791 eck$LassoCheckResult]: Stem: 3879#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 3880#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3915#L14 assume !(0 == main_~i~0); 3913#L14-2 assume !(main_~i~0 == main_~range~0); 3912#L17-1 assume !(1 == main_~up~0); 3911#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3909#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3883#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3884#L14 assume !(0 == main_~i~0); 3896#L14-2 assume !(main_~i~0 == main_~range~0); 3891#L17-1 assume !(1 == main_~up~0); 3892#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3917#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3997#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3996#L14 assume !(0 == main_~i~0); 3995#L14-2 assume !(main_~i~0 == main_~range~0); 3994#L17-1 assume !(1 == main_~up~0); 3993#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3992#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3991#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3990#L14 assume !(0 == main_~i~0); 3989#L14-2 assume !(main_~i~0 == main_~range~0); 3988#L17-1 assume !(1 == main_~up~0); 3987#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3986#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3985#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3984#L14 assume !(0 == main_~i~0); 3983#L14-2 assume !(main_~i~0 == main_~range~0); 3982#L17-1 assume !(1 == main_~up~0); 3981#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3980#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3979#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3978#L14 assume !(0 == main_~i~0); 3977#L14-2 assume !(main_~i~0 == main_~range~0); 3976#L17-1 assume !(1 == main_~up~0); 3975#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3974#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3973#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3972#L14 assume !(0 == main_~i~0); 3971#L14-2 assume !(main_~i~0 == main_~range~0); 3970#L17-1 assume !(1 == main_~up~0); 3969#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3968#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3967#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3966#L14 assume !(0 == main_~i~0); 3965#L14-2 assume !(main_~i~0 == main_~range~0); 3964#L17-1 assume !(1 == main_~up~0); 3963#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3962#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3931#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3959#L14 assume !(0 == main_~i~0); 3945#L14-2 assume !(main_~i~0 == main_~range~0); 3943#L17-1 assume !(1 == main_~up~0); 3935#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3930#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3932#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3924#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3925#L14-2 [2021-10-21 19:43:39,924 INFO L793 eck$LassoCheckResult]: Loop: 3925#L14-2 assume !(main_~i~0 == main_~range~0); 3920#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3921#L20-1 assume !(0 == main_~up~0); 3941#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3940#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3939#L14 assume !(0 == main_~i~0); 3938#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 3937#L17-1 assume !(1 == main_~up~0); 3936#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3933#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3927#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3928#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3925#L14-2 [2021-10-21 19:43:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:39,925 INFO L82 PathProgramCache]: Analyzing trace with hash 815169148, now seen corresponding path program 6 times [2021-10-21 19:43:39,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:39,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541156034] [2021-10-21 19:43:39,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:39,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:40,051 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:40,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:40,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541156034] [2021-10-21 19:43:40,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541156034] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:40,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021333621] [2021-10-21 19:43:40,052 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:43:40,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:40,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:40,055 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:40,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-21 19:43:40,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-21 19:43:40,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:40,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:43:40,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:40,398 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:40,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021333621] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:40,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:40,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-10-21 19:43:40,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920764553] [2021-10-21 19:43:40,399 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:40,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:40,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 8 times [2021-10-21 19:43:40,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:40,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641066911] [2021-10-21 19:43:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:40,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:40,403 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:40,407 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:40,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:40,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:43:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:43:40,463 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. cyclomatic complexity: 12 Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:40,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:40,631 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2021-10-21 19:43:40,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:43:40,632 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 201 states and 209 transitions. [2021-10-21 19:43:40,633 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:40,635 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 201 states to 197 states and 205 transitions. [2021-10-21 19:43:40,635 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2021-10-21 19:43:40,635 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 111 [2021-10-21 19:43:40,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 197 states and 205 transitions. [2021-10-21 19:43:40,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:40,635 INFO L681 BuchiCegarLoop]: Abstraction has 197 states and 205 transitions. [2021-10-21 19:43:40,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states and 205 transitions. [2021-10-21 19:43:40,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2021-10-21 19:43:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 183 states have (on average 1.0437158469945356) internal successors, (191), 182 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:40,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 191 transitions. [2021-10-21 19:43:40,641 INFO L704 BuchiCegarLoop]: Abstraction has 183 states and 191 transitions. [2021-10-21 19:43:40,641 INFO L587 BuchiCegarLoop]: Abstraction has 183 states and 191 transitions. [2021-10-21 19:43:40,641 INFO L425 BuchiCegarLoop]: ======== Iteration 17============ [2021-10-21 19:43:40,641 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 183 states and 191 transitions. [2021-10-21 19:43:40,642 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:40,643 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:40,643 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:40,644 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 11, 11, 11, 11, 1, 1] [2021-10-21 19:43:40,644 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:40,644 INFO L791 eck$LassoCheckResult]: Stem: 4441#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 4442#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4477#L14 assume !(0 == main_~i~0); 4475#L14-2 assume !(main_~i~0 == main_~range~0); 4474#L17-1 assume !(1 == main_~up~0); 4473#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4471#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4445#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4446#L14 assume !(0 == main_~i~0); 4457#L14-2 assume !(main_~i~0 == main_~range~0); 4452#L17-1 assume !(1 == main_~up~0); 4449#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4450#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4609#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4608#L14 assume !(0 == main_~i~0); 4607#L14-2 assume !(main_~i~0 == main_~range~0); 4606#L17-1 assume !(1 == main_~up~0); 4605#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4604#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4603#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4602#L14 assume !(0 == main_~i~0); 4601#L14-2 assume !(main_~i~0 == main_~range~0); 4600#L17-1 assume !(1 == main_~up~0); 4599#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4598#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4597#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4596#L14 assume !(0 == main_~i~0); 4595#L14-2 assume !(main_~i~0 == main_~range~0); 4594#L17-1 assume !(1 == main_~up~0); 4593#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4592#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4591#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4590#L14 assume !(0 == main_~i~0); 4589#L14-2 assume !(main_~i~0 == main_~range~0); 4588#L17-1 assume !(1 == main_~up~0); 4587#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4586#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4585#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4584#L14 assume !(0 == main_~i~0); 4583#L14-2 assume !(main_~i~0 == main_~range~0); 4582#L17-1 assume !(1 == main_~up~0); 4581#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4580#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4579#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4578#L14 assume !(0 == main_~i~0); 4577#L14-2 assume !(main_~i~0 == main_~range~0); 4576#L17-1 assume !(1 == main_~up~0); 4575#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4574#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4573#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4572#L14 assume !(0 == main_~i~0); 4571#L14-2 assume !(main_~i~0 == main_~range~0); 4570#L17-1 assume !(1 == main_~up~0); 4569#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4568#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4567#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4566#L14 assume !(0 == main_~i~0); 4565#L14-2 assume !(main_~i~0 == main_~range~0); 4564#L17-1 assume !(1 == main_~up~0); 4563#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4562#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4493#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4559#L14 assume !(0 == main_~i~0); 4507#L14-2 assume !(main_~i~0 == main_~range~0); 4505#L17-1 assume !(1 == main_~up~0); 4497#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4492#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4494#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4486#L14 assume 0 == main_~i~0;main_~up~0 := 1; 4487#L14-2 [2021-10-21 19:43:40,645 INFO L793 eck$LassoCheckResult]: Loop: 4487#L14-2 assume !(main_~i~0 == main_~range~0); 4482#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4483#L20-1 assume !(0 == main_~up~0); 4503#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 4502#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4501#L14 assume !(0 == main_~i~0); 4500#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 4499#L17-1 assume !(1 == main_~up~0); 4498#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4495#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 4489#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4490#L14 assume 0 == main_~i~0;main_~up~0 := 1; 4487#L14-2 [2021-10-21 19:43:40,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:40,645 INFO L82 PathProgramCache]: Analyzing trace with hash -2023032994, now seen corresponding path program 7 times [2021-10-21 19:43:40,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:40,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633648863] [2021-10-21 19:43:40,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:40,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:40,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:40,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:40,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633648863] [2021-10-21 19:43:40,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633648863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:40,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809637652] [2021-10-21 19:43:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:43:40,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:40,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:40,816 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:40,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-21 19:43:40,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:40,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:43:40,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:41,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809637652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:41,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:41,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-10-21 19:43:41,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131337225] [2021-10-21 19:43:41,207 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:41,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:41,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 9 times [2021-10-21 19:43:41,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:41,211 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044170185] [2021-10-21 19:43:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:41,211 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:41,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:41,221 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:41,230 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:41,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:43:41,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:43:41,286 INFO L87 Difference]: Start difference. First operand 183 states and 191 transitions. cyclomatic complexity: 12 Second operand has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:41,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:41,440 INFO L93 Difference]: Finished difference Result 275 states and 283 transitions. [2021-10-21 19:43:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:43:41,441 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 275 states and 283 transitions. [2021-10-21 19:43:41,444 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:41,447 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 275 states to 271 states and 279 transitions. [2021-10-21 19:43:41,447 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2021-10-21 19:43:41,447 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2021-10-21 19:43:41,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 279 transitions. [2021-10-21 19:43:41,448 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:41,448 INFO L681 BuchiCegarLoop]: Abstraction has 271 states and 279 transitions. [2021-10-21 19:43:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states and 279 transitions. [2021-10-21 19:43:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 207. [2021-10-21 19:43:41,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 207 states have (on average 1.038647342995169) internal successors, (215), 206 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:41,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 215 transitions. [2021-10-21 19:43:41,454 INFO L704 BuchiCegarLoop]: Abstraction has 207 states and 215 transitions. [2021-10-21 19:43:41,454 INFO L587 BuchiCegarLoop]: Abstraction has 207 states and 215 transitions. [2021-10-21 19:43:41,454 INFO L425 BuchiCegarLoop]: ======== Iteration 18============ [2021-10-21 19:43:41,454 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 207 states and 215 transitions. [2021-10-21 19:43:41,456 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:41,456 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:41,456 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:41,457 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 13, 13, 13, 13, 1, 1] [2021-10-21 19:43:41,458 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:41,458 INFO L791 eck$LassoCheckResult]: Stem: 5134#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 5135#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5152#L14 assume !(0 == main_~i~0); 5159#L14-2 assume !(main_~i~0 == main_~range~0); 5158#L17-1 assume !(1 == main_~up~0); 5157#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5154#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5138#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5139#L14 assume !(0 == main_~i~0); 5148#L14-2 assume !(main_~i~0 == main_~range~0); 5150#L17-1 assume !(1 == main_~up~0); 5160#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5161#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5268#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5267#L14 assume !(0 == main_~i~0); 5266#L14-2 assume !(main_~i~0 == main_~range~0); 5265#L17-1 assume !(1 == main_~up~0); 5264#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5263#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5262#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5261#L14 assume !(0 == main_~i~0); 5260#L14-2 assume !(main_~i~0 == main_~range~0); 5259#L17-1 assume !(1 == main_~up~0); 5258#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5257#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5256#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5255#L14 assume !(0 == main_~i~0); 5254#L14-2 assume !(main_~i~0 == main_~range~0); 5253#L17-1 assume !(1 == main_~up~0); 5252#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5251#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5250#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5249#L14 assume !(0 == main_~i~0); 5248#L14-2 assume !(main_~i~0 == main_~range~0); 5247#L17-1 assume !(1 == main_~up~0); 5246#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5245#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5244#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5243#L14 assume !(0 == main_~i~0); 5242#L14-2 assume !(main_~i~0 == main_~range~0); 5241#L17-1 assume !(1 == main_~up~0); 5240#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5239#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5238#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5237#L14 assume !(0 == main_~i~0); 5236#L14-2 assume !(main_~i~0 == main_~range~0); 5235#L17-1 assume !(1 == main_~up~0); 5234#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5233#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5232#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5231#L14 assume !(0 == main_~i~0); 5230#L14-2 assume !(main_~i~0 == main_~range~0); 5229#L17-1 assume !(1 == main_~up~0); 5228#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5227#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5226#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5225#L14 assume !(0 == main_~i~0); 5224#L14-2 assume !(main_~i~0 == main_~range~0); 5223#L17-1 assume !(1 == main_~up~0); 5222#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5221#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5220#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5219#L14 assume !(0 == main_~i~0); 5218#L14-2 assume !(main_~i~0 == main_~range~0); 5217#L17-1 assume !(1 == main_~up~0); 5216#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5215#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5214#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5213#L14 assume !(0 == main_~i~0); 5212#L14-2 assume !(main_~i~0 == main_~range~0); 5211#L17-1 assume !(1 == main_~up~0); 5210#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5209#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5184#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5206#L14 assume !(0 == main_~i~0); 5198#L14-2 assume !(main_~i~0 == main_~range~0); 5196#L17-1 assume !(1 == main_~up~0); 5188#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5183#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5185#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5177#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5178#L14-2 [2021-10-21 19:43:41,458 INFO L793 eck$LassoCheckResult]: Loop: 5178#L14-2 assume !(main_~i~0 == main_~range~0); 5173#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5174#L20-1 assume !(0 == main_~up~0); 5194#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5193#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5192#L14 assume !(0 == main_~i~0); 5191#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 5190#L17-1 assume !(1 == main_~up~0); 5189#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5186#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5180#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5181#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5178#L14-2 [2021-10-21 19:43:41,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash 989277504, now seen corresponding path program 8 times [2021-10-21 19:43:41,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:41,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098023122] [2021-10-21 19:43:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:41,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:41,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:41,643 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:41,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:41,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098023122] [2021-10-21 19:43:41,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098023122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:41,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512838875] [2021-10-21 19:43:41,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:43:41,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:41,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:41,646 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:41,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-21 19:43:41,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:43:41,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:41,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:43:41,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:42,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512838875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:42,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:42,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-10-21 19:43:42,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127884454] [2021-10-21 19:43:42,051 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:42,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:42,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 10 times [2021-10-21 19:43:42,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:42,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694169928] [2021-10-21 19:43:42,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:42,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:42,058 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:42,061 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:42,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-21 19:43:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-10-21 19:43:42,150 INFO L87 Difference]: Start difference. First operand 207 states and 215 transitions. cyclomatic complexity: 12 Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:42,324 INFO L93 Difference]: Finished difference Result 243 states and 251 transitions. [2021-10-21 19:43:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-21 19:43:42,325 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 243 states and 251 transitions. [2021-10-21 19:43:42,327 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:42,330 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 243 states to 239 states and 247 transitions. [2021-10-21 19:43:42,330 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2021-10-21 19:43:42,330 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 129 [2021-10-21 19:43:42,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 239 states and 247 transitions. [2021-10-21 19:43:42,330 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:42,331 INFO L681 BuchiCegarLoop]: Abstraction has 239 states and 247 transitions. [2021-10-21 19:43:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states and 247 transitions. [2021-10-21 19:43:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2021-10-21 19:43:42,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 231 states have (on average 1.0346320346320346) internal successors, (239), 230 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2021-10-21 19:43:42,338 INFO L704 BuchiCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-10-21 19:43:42,338 INFO L587 BuchiCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-10-21 19:43:42,338 INFO L425 BuchiCegarLoop]: ======== Iteration 19============ [2021-10-21 19:43:42,339 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 231 states and 239 transitions. [2021-10-21 19:43:42,340 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:42,341 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:42,341 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:42,351 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [16, 15, 15, 15, 15, 15, 1, 1] [2021-10-21 19:43:42,351 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:42,351 INFO L791 eck$LassoCheckResult]: Stem: 5857#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 5858#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5894#L14 assume !(0 == main_~i~0); 5892#L14-2 assume !(main_~i~0 == main_~range~0); 5891#L17-1 assume !(1 == main_~up~0); 5890#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5888#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5861#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5862#L14 assume !(0 == main_~i~0); 5873#L14-2 assume !(main_~i~0 == main_~range~0); 5876#L17-1 assume !(1 == main_~up~0); 6085#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6084#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6083#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6082#L14 assume !(0 == main_~i~0); 6081#L14-2 assume !(main_~i~0 == main_~range~0); 6080#L17-1 assume !(1 == main_~up~0); 6079#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6078#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6077#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6076#L14 assume !(0 == main_~i~0); 6075#L14-2 assume !(main_~i~0 == main_~range~0); 6074#L17-1 assume !(1 == main_~up~0); 6073#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6072#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6071#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6070#L14 assume !(0 == main_~i~0); 6069#L14-2 assume !(main_~i~0 == main_~range~0); 6068#L17-1 assume !(1 == main_~up~0); 6067#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6066#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6065#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6064#L14 assume !(0 == main_~i~0); 6063#L14-2 assume !(main_~i~0 == main_~range~0); 6062#L17-1 assume !(1 == main_~up~0); 6061#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6060#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6059#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6058#L14 assume !(0 == main_~i~0); 6057#L14-2 assume !(main_~i~0 == main_~range~0); 6056#L17-1 assume !(1 == main_~up~0); 6055#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6054#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6053#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6052#L14 assume !(0 == main_~i~0); 6051#L14-2 assume !(main_~i~0 == main_~range~0); 6050#L17-1 assume !(1 == main_~up~0); 6049#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6048#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6047#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6046#L14 assume !(0 == main_~i~0); 6045#L14-2 assume !(main_~i~0 == main_~range~0); 6044#L17-1 assume !(1 == main_~up~0); 6043#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6042#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6041#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6040#L14 assume !(0 == main_~i~0); 6039#L14-2 assume !(main_~i~0 == main_~range~0); 6038#L17-1 assume !(1 == main_~up~0); 6037#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6036#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6035#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6034#L14 assume !(0 == main_~i~0); 6033#L14-2 assume !(main_~i~0 == main_~range~0); 6032#L17-1 assume !(1 == main_~up~0); 6031#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6030#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6029#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6028#L14 assume !(0 == main_~i~0); 6027#L14-2 assume !(main_~i~0 == main_~range~0); 6026#L17-1 assume !(1 == main_~up~0); 6025#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6024#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6023#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6022#L14 assume !(0 == main_~i~0); 6021#L14-2 assume !(main_~i~0 == main_~range~0); 6020#L17-1 assume !(1 == main_~up~0); 6019#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6018#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6017#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6016#L14 assume !(0 == main_~i~0); 6015#L14-2 assume !(main_~i~0 == main_~range~0); 6014#L17-1 assume !(1 == main_~up~0); 6013#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6012#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5908#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5924#L14 assume !(0 == main_~i~0); 5922#L14-2 assume !(main_~i~0 == main_~range~0); 5920#L17-1 assume !(1 == main_~up~0); 5912#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5907#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5909#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5902#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5903#L14-2 [2021-10-21 19:43:42,352 INFO L793 eck$LassoCheckResult]: Loop: 5903#L14-2 assume !(main_~i~0 == main_~range~0); 5898#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5899#L20-1 assume !(0 == main_~up~0); 5919#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5918#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5917#L14 assume !(0 == main_~i~0); 5916#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 5915#L17-1 assume !(1 == main_~up~0); 5914#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5911#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5905#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5906#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5903#L14-2 [2021-10-21 19:43:42,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:42,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1400397790, now seen corresponding path program 9 times [2021-10-21 19:43:42,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:42,353 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685209973] [2021-10-21 19:43:42,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:42,353 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:42,620 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:42,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685209973] [2021-10-21 19:43:42,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685209973] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:42,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595611311] [2021-10-21 19:43:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:43:42,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:42,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:42,624 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:42,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-21 19:43:42,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-21 19:43:42,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:42,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:43:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:43,183 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:43,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595611311] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:43,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:43,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-10-21 19:43:43,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153251342] [2021-10-21 19:43:43,186 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:43,188 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 11 times [2021-10-21 19:43:43,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:43,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272868165] [2021-10-21 19:43:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:43,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:43,216 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:43,220 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:43,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:43,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-21 19:43:43,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:43:43,278 INFO L87 Difference]: Start difference. First operand 231 states and 239 transitions. cyclomatic complexity: 12 Second operand has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:43,468 INFO L93 Difference]: Finished difference Result 267 states and 275 transitions. [2021-10-21 19:43:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:43:43,469 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 275 transitions. [2021-10-21 19:43:43,472 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:43,475 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 263 states and 271 transitions. [2021-10-21 19:43:43,475 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2021-10-21 19:43:43,475 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-10-21 19:43:43,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 263 states and 271 transitions. [2021-10-21 19:43:43,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:43,476 INFO L681 BuchiCegarLoop]: Abstraction has 263 states and 271 transitions. [2021-10-21 19:43:43,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states and 271 transitions. [2021-10-21 19:43:43,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 255. [2021-10-21 19:43:43,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 255 states have (on average 1.031372549019608) internal successors, (263), 254 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:43,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 263 transitions. [2021-10-21 19:43:43,484 INFO L704 BuchiCegarLoop]: Abstraction has 255 states and 263 transitions. [2021-10-21 19:43:43,484 INFO L587 BuchiCegarLoop]: Abstraction has 255 states and 263 transitions. [2021-10-21 19:43:43,484 INFO L425 BuchiCegarLoop]: ======== Iteration 20============ [2021-10-21 19:43:43,484 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 263 transitions. [2021-10-21 19:43:43,486 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-21 19:43:43,487 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:43,487 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:43,488 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [18, 17, 16, 15, 15, 15, 2, 2, 2, 1, 1, 1] [2021-10-21 19:43:43,488 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-21 19:43:43,489 INFO L791 eck$LassoCheckResult]: Stem: 6666#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 6667#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6693#L14 assume 0 == main_~i~0;main_~up~0 := 1; 6691#L14-2 assume !(main_~i~0 == main_~range~0); 6689#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6686#L20-1 assume !(0 == main_~up~0); 6687#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6696#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6713#L14 assume !(0 == main_~i~0); 6709#L14-2 assume !(main_~i~0 == main_~range~0); 6710#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6705#L20-1 assume !(0 == main_~up~0); 6706#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 6831#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6829#L14 assume !(0 == main_~i~0); 6827#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 6825#L17-1 assume !(1 == main_~up~0); 6823#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6821#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 6819#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6818#L14 assume !(0 == main_~i~0); 6817#L14-2 assume !(main_~i~0 == main_~range~0); 6816#L17-1 assume !(1 == main_~up~0); 6815#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6814#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6813#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6812#L14 assume !(0 == main_~i~0); 6811#L14-2 assume !(main_~i~0 == main_~range~0); 6810#L17-1 assume !(1 == main_~up~0); 6809#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6808#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6807#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6806#L14 assume !(0 == main_~i~0); 6805#L14-2 assume !(main_~i~0 == main_~range~0); 6804#L17-1 assume !(1 == main_~up~0); 6803#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6802#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6801#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6800#L14 assume !(0 == main_~i~0); 6799#L14-2 assume !(main_~i~0 == main_~range~0); 6798#L17-1 assume !(1 == main_~up~0); 6797#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6796#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6795#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6794#L14 assume !(0 == main_~i~0); 6793#L14-2 assume !(main_~i~0 == main_~range~0); 6792#L17-1 assume !(1 == main_~up~0); 6791#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6790#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6789#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6788#L14 assume !(0 == main_~i~0); 6787#L14-2 assume !(main_~i~0 == main_~range~0); 6786#L17-1 assume !(1 == main_~up~0); 6785#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6784#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6783#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6782#L14 assume !(0 == main_~i~0); 6781#L14-2 assume !(main_~i~0 == main_~range~0); 6780#L17-1 assume !(1 == main_~up~0); 6779#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6778#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6777#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6776#L14 assume !(0 == main_~i~0); 6775#L14-2 assume !(main_~i~0 == main_~range~0); 6774#L17-1 assume !(1 == main_~up~0); 6773#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6772#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6771#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6770#L14 assume !(0 == main_~i~0); 6769#L14-2 assume !(main_~i~0 == main_~range~0); 6768#L17-1 assume !(1 == main_~up~0); 6767#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6766#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6765#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6764#L14 assume !(0 == main_~i~0); 6763#L14-2 assume !(main_~i~0 == main_~range~0); 6762#L17-1 assume !(1 == main_~up~0); 6761#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6760#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6759#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6758#L14 assume !(0 == main_~i~0); 6757#L14-2 assume !(main_~i~0 == main_~range~0); 6756#L17-1 assume !(1 == main_~up~0); 6755#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6754#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6753#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6752#L14 assume !(0 == main_~i~0); 6751#L14-2 assume !(main_~i~0 == main_~range~0); 6750#L17-1 assume !(1 == main_~up~0); 6749#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6748#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6747#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6746#L14 assume !(0 == main_~i~0); 6745#L14-2 assume !(main_~i~0 == main_~range~0); 6744#L17-1 assume !(1 == main_~up~0); 6743#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6742#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6741#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6740#L14 assume !(0 == main_~i~0); 6739#L14-2 assume !(main_~i~0 == main_~range~0); 6738#L17-1 assume !(1 == main_~up~0); 6737#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6736#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6735#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6734#L14 assume !(0 == main_~i~0); 6732#L14-2 [2021-10-21 19:43:43,489 INFO L793 eck$LassoCheckResult]: Loop: 6732#L14-2 assume !(main_~i~0 == main_~range~0); 6730#L17-1 assume !(1 == main_~up~0); 6722#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6719#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6714#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6715#L14 assume !(0 == main_~i~0); 6732#L14-2 [2021-10-21 19:43:43,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:43,489 INFO L82 PathProgramCache]: Analyzing trace with hash -296360126, now seen corresponding path program 1 times [2021-10-21 19:43:43,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:43,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223918491] [2021-10-21 19:43:43,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:43,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-10-21 19:43:43,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:43,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223918491] [2021-10-21 19:43:43,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223918491] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:43:43,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:43:43,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:43:43,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510919249] [2021-10-21 19:43:43,543 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:43,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:43,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1514610322, now seen corresponding path program 1 times [2021-10-21 19:43:43,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:43,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713952144] [2021-10-21 19:43:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:43,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:43,550 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:43,553 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:43,597 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:43,598 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:43,598 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:43,598 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:43,598 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-21 19:43:43,598 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:43,598 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:43,598 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:43,598 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration20_Loop [2021-10-21 19:43:43,598 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:43,598 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:43,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,622 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,674 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:43,675 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-21 19:43:43,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:43,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:43,677 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:43,679 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-21 19:43:43,679 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:43,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Waiting until timeout for monitored process [2021-10-21 19:43:43,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Ended with exit code 0 [2021-10-21 19:43:43,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:43,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:43,735 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:43,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-21 19:43:43,739 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-21 19:43:43,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Waiting until timeout for monitored process [2021-10-21 19:43:43,873 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-21 19:43:43,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Ended with exit code 0 [2021-10-21 19:43:43,876 INFO L210 LassoAnalysis]: Preferences: [2021-10-21 19:43:43,876 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-21 19:43:43,876 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-21 19:43:43,876 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-21 19:43:43,876 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-21 19:43:43,876 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:43,876 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-21 19:43:43,876 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-21 19:43:43,876 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration20_Loop [2021-10-21 19:43:43,876 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-21 19:43:43,876 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-21 19:43:43,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,893 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,895 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-21 19:43:43,944 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-21 19:43:43,944 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-21 19:43:43,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:43,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:43,945 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:43,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Waiting until timeout for monitored process [2021-10-21 19:43:43,947 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-21 19:43:43,954 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-21 19:43:43,954 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-21 19:43:43,954 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-21 19:43:43,954 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-21 19:43:43,954 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-21 19:43:43,955 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-21 19:43:43,955 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-21 19:43:43,965 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-21 19:43:43,967 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-21 19:43:43,968 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-21 19:43:43,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-21 19:43:43,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:43,969 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-21 19:43:43,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Waiting until timeout for monitored process [2021-10-21 19:43:43,970 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-21 19:43:43,970 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-21 19:43:43,970 INFO L513 LassoAnalysis]: Proved termination. [2021-10-21 19:43:43,970 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0) = 1*ULTIMATE.start_main_~range~0 Supporting invariants [] [2021-10-21 19:43:43,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:43,991 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-21 19:43:44,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-21 19:43:44,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:44,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:44,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:43:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:44,424 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 [2021-10-21 19:43:44,424 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 263 transitions. cyclomatic complexity: 12 Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:44,458 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 263 transitions. cyclomatic complexity: 12. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 508 states and 535 transitions. Complement of second has 6 states. [2021-10-21 19:43:44,458 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 [2021-10-21 19:43:44,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:44,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2021-10-21 19:43:44,459 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 105 letters. Loop has 6 letters. [2021-10-21 19:43:44,460 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:44,460 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 111 letters. Loop has 6 letters. [2021-10-21 19:43:44,460 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:44,460 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 105 letters. Loop has 12 letters. [2021-10-21 19:43:44,461 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-21 19:43:44,461 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 508 states and 535 transitions. [2021-10-21 19:43:44,467 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:44,470 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 508 states to 294 states and 310 transitions. [2021-10-21 19:43:44,470 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-10-21 19:43:44,470 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-10-21 19:43:44,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 294 states and 310 transitions. [2021-10-21 19:43:44,473 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:44,473 INFO L681 BuchiCegarLoop]: Abstraction has 294 states and 310 transitions. [2021-10-21 19:43:44,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states and 310 transitions. [2021-10-21 19:43:44,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 283. [2021-10-21 19:43:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 283 states have (on average 1.0494699646643109) internal successors, (297), 282 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:44,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 297 transitions. [2021-10-21 19:43:44,481 INFO L704 BuchiCegarLoop]: Abstraction has 283 states and 297 transitions. [2021-10-21 19:43:44,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:44,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:43:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:43:44,482 INFO L87 Difference]: Start difference. First operand 283 states and 297 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:44,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:44,565 INFO L93 Difference]: Finished difference Result 294 states and 307 transitions. [2021-10-21 19:43:44,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:43:44,565 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 294 states and 307 transitions. [2021-10-21 19:43:44,568 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:44,570 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 294 states to 292 states and 305 transitions. [2021-10-21 19:43:44,570 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-21 19:43:44,570 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-21 19:43:44,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 305 transitions. [2021-10-21 19:43:44,571 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:44,571 INFO L681 BuchiCegarLoop]: Abstraction has 292 states and 305 transitions. [2021-10-21 19:43:44,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 305 transitions. [2021-10-21 19:43:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2021-10-21 19:43:44,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 288 states have (on average 1.0451388888888888) internal successors, (301), 287 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 301 transitions. [2021-10-21 19:43:44,577 INFO L704 BuchiCegarLoop]: Abstraction has 288 states and 301 transitions. [2021-10-21 19:43:44,578 INFO L587 BuchiCegarLoop]: Abstraction has 288 states and 301 transitions. [2021-10-21 19:43:44,578 INFO L425 BuchiCegarLoop]: ======== Iteration 21============ [2021-10-21 19:43:44,578 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 288 states and 301 transitions. [2021-10-21 19:43:44,580 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:44,580 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:44,580 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:44,581 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [18, 17, 17, 17, 17, 17, 1, 1] [2021-10-21 19:43:44,581 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:44,581 INFO L791 eck$LassoCheckResult]: Stem: 8368#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 8369#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8407#L14 assume !(0 == main_~i~0); 8650#L14-2 assume !(main_~i~0 == main_~range~0); 8648#L17-1 assume !(1 == main_~up~0); 8515#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8516#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8511#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8510#L14 assume !(0 == main_~i~0); 8509#L14-2 assume !(main_~i~0 == main_~range~0); 8508#L17-1 assume !(1 == main_~up~0); 8507#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8506#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8505#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8504#L14 assume !(0 == main_~i~0); 8503#L14-2 assume !(main_~i~0 == main_~range~0); 8502#L17-1 assume !(1 == main_~up~0); 8501#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8500#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8499#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8498#L14 assume !(0 == main_~i~0); 8497#L14-2 assume !(main_~i~0 == main_~range~0); 8496#L17-1 assume !(1 == main_~up~0); 8495#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8494#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8493#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8492#L14 assume !(0 == main_~i~0); 8491#L14-2 assume !(main_~i~0 == main_~range~0); 8490#L17-1 assume !(1 == main_~up~0); 8489#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8488#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8487#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8486#L14 assume !(0 == main_~i~0); 8485#L14-2 assume !(main_~i~0 == main_~range~0); 8484#L17-1 assume !(1 == main_~up~0); 8483#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8482#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8481#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8480#L14 assume !(0 == main_~i~0); 8479#L14-2 assume !(main_~i~0 == main_~range~0); 8478#L17-1 assume !(1 == main_~up~0); 8477#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8476#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8475#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8474#L14 assume !(0 == main_~i~0); 8473#L14-2 assume !(main_~i~0 == main_~range~0); 8472#L17-1 assume !(1 == main_~up~0); 8471#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8470#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8469#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8468#L14 assume !(0 == main_~i~0); 8467#L14-2 assume !(main_~i~0 == main_~range~0); 8466#L17-1 assume !(1 == main_~up~0); 8465#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8464#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8463#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8462#L14 assume !(0 == main_~i~0); 8461#L14-2 assume !(main_~i~0 == main_~range~0); 8460#L17-1 assume !(1 == main_~up~0); 8459#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8458#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8457#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8456#L14 assume !(0 == main_~i~0); 8455#L14-2 assume !(main_~i~0 == main_~range~0); 8454#L17-1 assume !(1 == main_~up~0); 8453#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8452#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8451#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8450#L14 assume !(0 == main_~i~0); 8449#L14-2 assume !(main_~i~0 == main_~range~0); 8448#L17-1 assume !(1 == main_~up~0); 8447#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8446#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8445#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8444#L14 assume !(0 == main_~i~0); 8443#L14-2 assume !(main_~i~0 == main_~range~0); 8442#L17-1 assume !(1 == main_~up~0); 8441#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8440#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8439#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8438#L14 assume !(0 == main_~i~0); 8437#L14-2 assume !(main_~i~0 == main_~range~0); 8436#L17-1 assume !(1 == main_~up~0); 8435#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8434#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8433#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8432#L14 assume !(0 == main_~i~0); 8431#L14-2 assume !(main_~i~0 == main_~range~0); 8430#L17-1 assume !(1 == main_~up~0); 8429#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8428#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8427#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8426#L14 assume !(0 == main_~i~0); 8425#L14-2 assume !(main_~i~0 == main_~range~0); 8424#L17-1 assume !(1 == main_~up~0); 8423#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8422#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8412#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8420#L14 assume !(0 == main_~i~0); 8418#L14-2 assume !(main_~i~0 == main_~range~0); 8416#L17-1 assume !(1 == main_~up~0); 8414#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8411#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8408#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8394#L14 assume 0 == main_~i~0;main_~up~0 := 1; 8392#L14-2 [2021-10-21 19:43:44,581 INFO L793 eck$LassoCheckResult]: Loop: 8392#L14-2 assume !(main_~i~0 == main_~range~0); 8389#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8390#L20-1 assume !(0 == main_~up~0); 8401#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 8398#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8383#L14 assume !(0 == main_~i~0); 8384#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 8391#L17-1 assume !(1 == main_~up~0); 8374#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8375#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 8378#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8396#L14 assume 0 == main_~i~0;main_~up~0 := 1; 8392#L14-2 [2021-10-21 19:43:44,582 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:44,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:44,586 INFO L82 PathProgramCache]: Analyzing trace with hash 782815236, now seen corresponding path program 10 times [2021-10-21 19:43:44,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:44,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499455765] [2021-10-21 19:43:44,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:44,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:44,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:43:44,842 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:44,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:43:44,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499455765] [2021-10-21 19:43:44,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499455765] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:44,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351666672] [2021-10-21 19:43:44,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:43:44,843 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:43:44,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:43:44,843 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:43:44,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-21 19:43:45,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:43:45,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:43:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:43:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:43:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:43:45,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351666672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:43:45,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:43:45,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-10-21 19:43:45,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086908896] [2021-10-21 19:43:45,412 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-21 19:43:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 12 times [2021-10-21 19:43:45,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:45,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817736669] [2021-10-21 19:43:45,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:45,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:45,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,419 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:45,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,422 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:45,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:43:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-21 19:43:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:43:45,485 INFO L87 Difference]: Start difference. First operand 288 states and 301 transitions. cyclomatic complexity: 19 Second operand has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:45,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:43:45,697 INFO L93 Difference]: Finished difference Result 324 states and 337 transitions. [2021-10-21 19:43:45,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-21 19:43:45,698 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 324 states and 337 transitions. [2021-10-21 19:43:45,701 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:45,703 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 324 states to 320 states and 333 transitions. [2021-10-21 19:43:45,703 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-21 19:43:45,704 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-21 19:43:45,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 320 states and 333 transitions. [2021-10-21 19:43:45,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-21 19:43:45,704 INFO L681 BuchiCegarLoop]: Abstraction has 320 states and 333 transitions. [2021-10-21 19:43:45,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states and 333 transitions. [2021-10-21 19:43:45,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 312. [2021-10-21 19:43:45,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 312 states have (on average 1.0416666666666667) internal successors, (325), 311 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:43:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 325 transitions. [2021-10-21 19:43:45,711 INFO L704 BuchiCegarLoop]: Abstraction has 312 states and 325 transitions. [2021-10-21 19:43:45,711 INFO L587 BuchiCegarLoop]: Abstraction has 312 states and 325 transitions. [2021-10-21 19:43:45,711 INFO L425 BuchiCegarLoop]: ======== Iteration 22============ [2021-10-21 19:43:45,711 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 312 states and 325 transitions. [2021-10-21 19:43:45,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-21 19:43:45,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-21 19:43:45,714 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-21 19:43:45,715 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [20, 19, 19, 19, 19, 19, 1, 1] [2021-10-21 19:43:45,715 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:43:45,716 INFO L791 eck$LassoCheckResult]: Stem: 9329#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 9330#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9367#L14 assume !(0 == main_~i~0); 9383#L14-2 assume !(main_~i~0 == main_~range~0); 9382#L17-1 assume !(1 == main_~up~0); 9381#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9379#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9340#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9638#L14 assume !(0 == main_~i~0); 9637#L14-2 assume !(main_~i~0 == main_~range~0); 9636#L17-1 assume !(1 == main_~up~0); 9635#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9634#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9633#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9632#L14 assume !(0 == main_~i~0); 9631#L14-2 assume !(main_~i~0 == main_~range~0); 9630#L17-1 assume !(1 == main_~up~0); 9629#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9628#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9627#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9626#L14 assume !(0 == main_~i~0); 9625#L14-2 assume !(main_~i~0 == main_~range~0); 9624#L17-1 assume !(1 == main_~up~0); 9623#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9622#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9621#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9620#L14 assume !(0 == main_~i~0); 9619#L14-2 assume !(main_~i~0 == main_~range~0); 9618#L17-1 assume !(1 == main_~up~0); 9617#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9616#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9615#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9614#L14 assume !(0 == main_~i~0); 9613#L14-2 assume !(main_~i~0 == main_~range~0); 9612#L17-1 assume !(1 == main_~up~0); 9611#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9610#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9609#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9608#L14 assume !(0 == main_~i~0); 9607#L14-2 assume !(main_~i~0 == main_~range~0); 9606#L17-1 assume !(1 == main_~up~0); 9605#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9604#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9603#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9602#L14 assume !(0 == main_~i~0); 9601#L14-2 assume !(main_~i~0 == main_~range~0); 9600#L17-1 assume !(1 == main_~up~0); 9599#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9598#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9597#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9596#L14 assume !(0 == main_~i~0); 9595#L14-2 assume !(main_~i~0 == main_~range~0); 9594#L17-1 assume !(1 == main_~up~0); 9593#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9592#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9591#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9590#L14 assume !(0 == main_~i~0); 9589#L14-2 assume !(main_~i~0 == main_~range~0); 9588#L17-1 assume !(1 == main_~up~0); 9587#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9586#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9585#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9584#L14 assume !(0 == main_~i~0); 9583#L14-2 assume !(main_~i~0 == main_~range~0); 9582#L17-1 assume !(1 == main_~up~0); 9581#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9580#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9579#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9578#L14 assume !(0 == main_~i~0); 9577#L14-2 assume !(main_~i~0 == main_~range~0); 9576#L17-1 assume !(1 == main_~up~0); 9575#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9574#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9573#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9572#L14 assume !(0 == main_~i~0); 9571#L14-2 assume !(main_~i~0 == main_~range~0); 9570#L17-1 assume !(1 == main_~up~0); 9569#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9568#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9567#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9566#L14 assume !(0 == main_~i~0); 9565#L14-2 assume !(main_~i~0 == main_~range~0); 9564#L17-1 assume !(1 == main_~up~0); 9563#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9562#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9561#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9560#L14 assume !(0 == main_~i~0); 9559#L14-2 assume !(main_~i~0 == main_~range~0); 9558#L17-1 assume !(1 == main_~up~0); 9557#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9556#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9555#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9554#L14 assume !(0 == main_~i~0); 9553#L14-2 assume !(main_~i~0 == main_~range~0); 9552#L17-1 assume !(1 == main_~up~0); 9551#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9550#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9549#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9548#L14 assume !(0 == main_~i~0); 9547#L14-2 assume !(main_~i~0 == main_~range~0); 9546#L17-1 assume !(1 == main_~up~0); 9545#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9544#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9543#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9542#L14 assume !(0 == main_~i~0); 9541#L14-2 assume !(main_~i~0 == main_~range~0); 9540#L17-1 assume !(1 == main_~up~0); 9539#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9538#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9375#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9389#L14 assume !(0 == main_~i~0); 9387#L14-2 assume !(main_~i~0 == main_~range~0); 9385#L17-1 assume !(1 == main_~up~0); 9377#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9374#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9371#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9354#L14 assume 0 == main_~i~0;main_~up~0 := 1; 9352#L14-2 [2021-10-21 19:43:45,716 INFO L793 eck$LassoCheckResult]: Loop: 9352#L14-2 assume !(main_~i~0 == main_~range~0); 9349#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 9350#L20-1 assume !(0 == main_~up~0); 9361#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 9358#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9344#L14 assume !(0 == main_~i~0); 9345#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 9351#L17-1 assume !(1 == main_~up~0); 9335#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9336#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 9339#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9356#L14 assume 0 == main_~i~0;main_~up~0 := 1; 9352#L14-2 [2021-10-21 19:43:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:45,716 INFO L82 PathProgramCache]: Analyzing trace with hash 623328486, now seen corresponding path program 11 times [2021-10-21 19:43:45,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:45,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912171452] [2021-10-21 19:43:45,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:45,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,738 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,762 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:45,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:45,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 13 times [2021-10-21 19:43:45,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:45,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267524873] [2021-10-21 19:43:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:45,764 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,769 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:45,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,772 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:43:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 737282760, now seen corresponding path program 2 times [2021-10-21 19:43:45,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:43:45,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453801213] [2021-10-21 19:43:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:43:45,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:43:45,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,796 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:43:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:43:45,822 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:43:46,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 21.10 07:43:46 BoogieIcfgContainer [2021-10-21 19:43:46,908 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-21 19:43:46,909 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:43:46,909 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:43:46,909 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:43:46,910 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:43:26" (3/4) ... [2021-10-21 19:43:46,912 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-21 19:43:46,971 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:43:46,971 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:43:46,972 INFO L168 Benchmark]: Toolchain (without parser) took 20889.03 ms. Allocated memory was 102.8 MB in the beginning and 232.8 MB in the end (delta: 130.0 MB). Free memory was 70.8 MB in the beginning and 112.5 MB in the end (delta: -41.7 MB). Peak memory consumption was 89.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,973 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:43:46,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.92 ms. Allocated memory is still 102.8 MB. Free memory was 70.6 MB in the beginning and 79.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,974 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.28 ms. Allocated memory is still 102.8 MB. Free memory was 79.1 MB in the beginning and 78.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:43:46,974 INFO L168 Benchmark]: Boogie Preprocessor took 19.38 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 76.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,975 INFO L168 Benchmark]: RCFGBuilder took 323.61 ms. Allocated memory is still 102.8 MB. Free memory was 76.9 MB in the beginning and 69.0 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,975 INFO L168 Benchmark]: BuchiAutomizer took 20125.63 ms. Allocated memory was 102.8 MB in the beginning and 232.8 MB in the end (delta: 130.0 MB). Free memory was 69.0 MB in the beginning and 117.8 MB in the end (delta: -48.7 MB). Peak memory consumption was 136.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,975 INFO L168 Benchmark]: Witness Printer took 62.41 ms. Allocated memory is still 232.8 MB. Free memory was 116.7 MB in the beginning and 112.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:43:46,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 102.8 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 314.92 ms. Allocated memory is still 102.8 MB. Free memory was 70.6 MB in the beginning and 79.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.28 ms. Allocated memory is still 102.8 MB. Free memory was 79.1 MB in the beginning and 78.0 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.38 ms. Allocated memory is still 102.8 MB. Free memory was 78.0 MB in the beginning and 76.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 323.61 ms. Allocated memory is still 102.8 MB. Free memory was 76.9 MB in the beginning and 69.0 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 20125.63 ms. Allocated memory was 102.8 MB in the beginning and 232.8 MB in the end (delta: 130.0 MB). Free memory was 69.0 MB in the beginning and 117.8 MB in the end (delta: -48.7 MB). Peak memory consumption was 136.2 MB. Max. memory is 16.1 GB. * Witness Printer took 62.41 ms. Allocated memory is still 232.8 MB. Free memory was 116.7 MB in the beginning and 112.5 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 24 terminating modules (19 trivial, 4 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 -1 * i and consists of 4 locations. One deterministic module has affine ranking function range + -1 * i and consists of 4 locations. One deterministic module has affine ranking function range and consists of 4 locations. One nondeterministic module has affine ranking function range + -1 * i and consists of 4 locations. 19 modules have a trivial ranking function, the largest among these consists of 22 locations. The remainder module has 312 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 20.0s and 22 iterations. TraceHistogramMax:20. Analysis of lassos took 15.8s. Construction of modules took 1.2s. Büchi inclusion checks took 2.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 21. Automata minimization 192.6ms AutomataMinimizationTime, 24 MinimizatonAttempts, 360 StatesRemovedByMinimization, 20 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 312 states and ocurred in iteration 21. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 231 SDtfs, 809 SDslu, 322 SDs, 0 SdLazy, 1595 SolverSat, 158 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1255.8ms Time LassoAnalysisResults: nont1 unkn0 SFLI4 SFLT2 conc1 concLT1 SILN11 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital29 mio100 ax141 hnf100 lsp59 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq179 hnf96 smp71 dnf158 smp88 tf105 neg92 sie116 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 3 Time: 35ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 6 MotzkinApplications: 18 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 12 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.8s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 17]: 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=1, range=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@76aa1ef0=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int range; [L8] int up; [L9] i = __VERIFIER_nondet_int() [L10] range = 20 [L11] up = 0 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 Loop: [L17] COND FALSE !(i == range) [L20] COND TRUE up == 1 [L21] i = i+1 [L23] COND FALSE !(up == 0) [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND TRUE i == range [L18] up = 0 [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:43:47,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:47,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:47,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-10-21 19:43:47,641 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-10-21 19:43:47,840 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-21 19:43:48,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-10-21 19:43:48,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:48,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-10-21 19:43:48,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:48,841 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-10-21 19:43:49,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:49,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-21 19:43:49,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_144f5226-4fa7-4dcd-aec5-04c064fbc64c/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...