./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 b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg --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-b2eff8b [2021-10-28 09:17:56,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:17:56,516 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:17:56,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:17:56,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:17:56,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:17:56,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:17:56,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:17:56,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:17:56,596 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:17:56,597 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:17:56,600 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:17:56,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:17:56,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:17:56,606 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:17:56,612 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:17:56,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:17:56,620 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:17:56,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:17:56,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:17:56,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:17:56,636 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:17:56,640 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:17:56,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:17:56,651 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:17:56,651 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:17:56,652 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:17:56,654 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:17:56,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:17:56,657 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:17:56,658 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:17:56,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:17:56,661 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:17:56,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:17:56,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:17:56,665 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:17:56,666 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:17:56,666 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:17:56,666 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:17:56,667 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:17:56,668 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:17:56,672 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 09:17:56,701 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:17:56,702 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:17:56,702 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:17:56,702 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:17:56,704 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:17:56,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:17:56,704 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:17:56,705 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 09:17:56,705 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 09:17:56,705 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 09:17:56,705 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 09:17:56,706 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 09:17:56,706 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 09:17:56,706 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:17:56,706 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 09:17:56,707 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:17:56,707 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:17:56,707 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 09:17:56,707 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 09:17:56,708 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 09:17:56,708 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:17:56,708 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 09:17:56,709 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:17:56,709 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 09:17:56,709 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:17:56,709 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:17:56,710 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:17:56,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:17:56,710 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:17:56,711 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 09:17:56,712 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_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac [2021-10-28 09:17:57,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:17:57,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:17:57,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:17:57,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:17:57,102 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:17:57,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-10-28 09:17:57,231 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/data/74f5fea6f/e003488014a243a499ace53b9bf0b5dd/FLAG4de7d410b [2021-10-28 09:17:57,724 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:17:57,725 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-10-28 09:17:57,731 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/data/74f5fea6f/e003488014a243a499ace53b9bf0b5dd/FLAG4de7d410b [2021-10-28 09:17:58,083 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/data/74f5fea6f/e003488014a243a499ace53b9bf0b5dd [2021-10-28 09:17:58,086 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:17:58,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:17:58,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:17:58,103 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:17:58,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:17:58,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69c243e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58, skipping insertion in model container [2021-10-28 09:17:58,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:17:58,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:17:58,322 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:17:58,327 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:17:58,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:17:58,351 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:17:58,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58 WrapperNode [2021-10-28 09:17:58,352 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:17:58,353 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:17:58,354 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:17:58,354 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:17:58,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,373 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,392 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:17:58,393 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:17:58,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:17:58,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:17:58,403 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,412 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,413 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:17:58,414 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:17:58,414 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:17:58,415 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:17:58,416 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (1/1) ... [2021-10-28 09:17:58,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:17:58,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:17:58,453 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:17:58,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 09:17:58,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:17:58,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:17:58,664 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:17:58,665 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 09:17:58,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:17:58 BoogieIcfgContainer [2021-10-28 09:17:58,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:17:58,669 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 09:17:58,669 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 09:17:58,676 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 09:17:58,677 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:17:58,677 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 09:17:58" (1/3) ... [2021-10-28 09:17:58,679 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4809cf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:17:58, skipping insertion in model container [2021-10-28 09:17:58,679 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:17:58,679 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:17:58" (2/3) ... [2021-10-28 09:17:58,680 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@4809cf0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 09:17:58, skipping insertion in model container [2021-10-28 09:17:58,680 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 09:17:58,680 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:17:58" (3/3) ... [2021-10-28 09:17:58,682 INFO L389 chiAutomizerObserver]: Analyzing ICFG Narrowing.c [2021-10-28 09:17:58,743 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 09:17:58,743 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 09:17:58,743 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 09:17:58,743 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 09:17:58,744 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 09:17:58,744 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 09:17:58,744 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 09:17:58,744 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 09:17:58,763 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) [2021-10-28 09:17:58,786 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 09:17:58,786 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:17:58,786 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:17:58,805 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:17:58,805 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:17:58,806 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 09:17:58,806 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) [2021-10-28 09:17:58,809 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 09:17:58,810 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:17:58,812 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:17:58,813 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:17:58,814 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:17:58,822 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 [2021-10-28 09:17:58,824 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 [2021-10-28 09:17:58,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:58,843 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-28 09:17:58,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:58,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714025043] [2021-10-28 09:17:58,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:58,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:58,978 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,013 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:17:59,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1186392078, now seen corresponding path program 1 times [2021-10-28 09:17:59,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320861704] [2021-10-28 09:17:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:59,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:17:59,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:17:59,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320861704] [2021-10-28 09:17:59,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320861704] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:17:59,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:17:59,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:17:59,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436202637] [2021-10-28 09:17:59,169 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:17:59,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:17:59,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:17:59,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:17:59,196 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) [2021-10-28 09:17:59,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:17:59,265 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2021-10-28 09:17:59,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:17:59,268 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 30 transitions. [2021-10-28 09:17:59,281 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:17:59,285 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 13 states and 22 transitions. [2021-10-28 09:17:59,286 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-28 09:17:59,287 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-28 09:17:59,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 22 transitions. [2021-10-28 09:17:59,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:17:59,288 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-28 09:17:59,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 22 transitions. [2021-10-28 09:17:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 09:17:59,354 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) [2021-10-28 09:17:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 22 transitions. [2021-10-28 09:17:59,356 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-28 09:17:59,356 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-28 09:17:59,356 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 09:17:59,357 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 22 transitions. [2021-10-28 09:17:59,358 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:17:59,358 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:17:59,358 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:17:59,383 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:17:59,383 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:17:59,383 INFO L791 eck$LassoCheckResult]: Stem: 41#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 42#L26-1 [2021-10-28 09:17:59,384 INFO L793 eck$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 [2021-10-28 09:17:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,385 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-10-28 09:17:59,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230835420] [2021-10-28 09:17:59,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,386 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,392 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,397 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:17:59,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1186394000, now seen corresponding path program 1 times [2021-10-28 09:17:59,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955988629] [2021-10-28 09:17:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,399 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:17:59,444 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:17:59,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955988629] [2021-10-28 09:17:59,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955988629] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:17:59,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:17:59,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:17:59,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925808515] [2021-10-28 09:17:59,447 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:17:59,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:17:59,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:17:59,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:17:59,449 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) [2021-10-28 09:17:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:17:59,468 INFO L93 Difference]: Finished difference Result 13 states and 21 transitions. [2021-10-28 09:17:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:17:59,469 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 21 transitions. [2021-10-28 09:17:59,471 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:17:59,472 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 21 transitions. [2021-10-28 09:17:59,472 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-28 09:17:59,473 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-28 09:17:59,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 21 transitions. [2021-10-28 09:17:59,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:17:59,474 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-28 09:17:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 21 transitions. [2021-10-28 09:17:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 09:17:59,477 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) [2021-10-28 09:17:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 21 transitions. [2021-10-28 09:17:59,478 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-28 09:17:59,478 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-28 09:17:59,478 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 09:17:59,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 21 transitions. [2021-10-28 09:17:59,480 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:17:59,480 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:17:59,480 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:17:59,481 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:17:59,481 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:17:59,481 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 [2021-10-28 09:17:59,482 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 [2021-10-28 09:17:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,483 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2021-10-28 09:17:59,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,484 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570820895] [2021-10-28 09:17:59,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,490 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,496 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:17:59,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1188240980, now seen corresponding path program 1 times [2021-10-28 09:17:59,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585858733] [2021-10-28 09:17:59,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:17:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:17:59,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:17:59,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585858733] [2021-10-28 09:17:59,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585858733] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:17:59,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:17:59,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:17:59,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162616041] [2021-10-28 09:17:59,570 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:17:59,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:17:59,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:17:59,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:17:59,575 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) [2021-10-28 09:17:59,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:17:59,695 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2021-10-28 09:17:59,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:17:59,695 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 51 transitions. [2021-10-28 09:17:59,698 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 32 [2021-10-28 09:17:59,701 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 51 transitions. [2021-10-28 09:17:59,701 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-28 09:17:59,702 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2021-10-28 09:17:59,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 51 transitions. [2021-10-28 09:17:59,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 09:17:59,703 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 51 transitions. [2021-10-28 09:17:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 51 transitions. [2021-10-28 09:17:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-10-28 09:17:59,712 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) [2021-10-28 09:17:59,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2021-10-28 09:17:59,716 INFO L704 BuchiCegarLoop]: Abstraction has 30 states and 47 transitions. [2021-10-28 09:17:59,716 INFO L587 BuchiCegarLoop]: Abstraction has 30 states and 47 transitions. [2021-10-28 09:17:59,717 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 09:17:59,717 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 47 transitions. [2021-10-28 09:17:59,719 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2021-10-28 09:17:59,722 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:17:59,722 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:17:59,723 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 09:17:59,723 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:17:59,724 INFO L791 eck$LassoCheckResult]: Stem: 126#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 127#L26-1 [2021-10-28 09:17:59,724 INFO L793 eck$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 [2021-10-28 09:17:59,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,727 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2021-10-28 09:17:59,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4464457] [2021-10-28 09:17:59,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,739 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,751 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:17:59,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1188300564, now seen corresponding path program 1 times [2021-10-28 09:17:59,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488372773] [2021-10-28 09:17:59,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,754 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,763 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,772 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:17:59,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:17:59,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1363856397, now seen corresponding path program 1 times [2021-10-28 09:17:59,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:17:59,774 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032319104] [2021-10-28 09:17:59,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:17:59,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:17:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,784 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:17:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:17:59,794 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:17:59,942 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:17:59,943 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:17:59,944 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:17:59,944 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:17:59,944 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:17:59,945 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:17:59,945 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:17:59,945 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:17:59,945 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-10-28 09:17:59,946 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:17:59,946 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:17:59,970 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:17:59,983 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:17:59,991 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:17:59,997 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:00,150 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:00,151 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:18:00,154 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,157 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,170 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:00,170 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:00,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 09:18:00,209 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:00,214 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: [] [2021-10-28 09:18:00,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,260 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:00,264 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:00,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 09:18:00,286 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:00,286 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: [] [2021-10-28 09:18:00,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,319 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,322 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:00,323 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:00,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 09:18:00,340 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:00,340 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: [] [2021-10-28 09:18:00,382 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,383 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,390 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,397 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:00,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:00,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 09:18:00,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,469 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,472 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:18:00,472 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:00,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 09:18:00,555 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:18:00,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,562 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:00,562 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:00,563 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:00,563 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:00,563 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:18:00,563 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,563 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:00,563 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:00,563 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-10-28 09:18:00,563 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:00,563 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:00,566 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:00,570 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:00,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:00,577 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:00,691 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:00,696 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:18:00,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,699 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 09:18:00,711 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 [2021-10-28 09:18:00,723 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:00,724 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:00,724 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:00,724 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:00,724 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:00,727 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:18:00,727 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:00,743 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:00,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,782 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,792 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 [2021-10-28 09:18:00,802 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:00,803 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:00,803 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:00,803 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:00,808 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:00,808 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:00,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 09:18:00,831 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:00,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,871 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,874 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 09:18:00,878 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 [2021-10-28 09:18:00,887 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:00,887 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:00,887 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:00,887 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:00,893 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:00,893 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:00,927 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:00,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:00,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:00,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:00,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:00,980 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 [2021-10-28 09:18:00,989 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:00,989 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:00,989 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:00,990 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:00,990 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:00,991 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:18:00,991 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:00,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 09:18:01,011 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:18:01,021 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:18:01,021 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:18:01,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:01,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:01,043 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:01,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 09:18:01,052 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:18:01,052 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:18:01,052 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:18:01,053 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 09:18:01,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:01,092 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:18:01,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:01,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:01,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:01,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:01,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:01,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:18:01,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:01,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-10-28 09:18:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:01,377 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 [2021-10-28 09:18:01,378 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) [2021-10-28 09:18:01,482 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. [2021-10-28 09:18:01,483 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 [2021-10-28 09:18:01,483 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) [2021-10-28 09:18:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-28 09:18:01,486 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 1 letters. Loop has 6 letters. [2021-10-28 09:18:01,487 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:01,488 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 6 letters. [2021-10-28 09:18:01,488 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:01,488 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 1 letters. Loop has 12 letters. [2021-10-28 09:18:01,490 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:01,491 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 76 states and 117 transitions. [2021-10-28 09:18:01,499 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 41 [2021-10-28 09:18:01,501 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 76 states to 71 states and 108 transitions. [2021-10-28 09:18:01,501 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-28 09:18:01,502 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-28 09:18:01,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 108 transitions. [2021-10-28 09:18:01,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:01,502 INFO L681 BuchiCegarLoop]: Abstraction has 71 states and 108 transitions. [2021-10-28 09:18:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states and 108 transitions. [2021-10-28 09:18:01,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-10-28 09:18:01,513 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) [2021-10-28 09:18:01,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 107 transitions. [2021-10-28 09:18:01,515 INFO L704 BuchiCegarLoop]: Abstraction has 70 states and 107 transitions. [2021-10-28 09:18:01,515 INFO L587 BuchiCegarLoop]: Abstraction has 70 states and 107 transitions. [2021-10-28 09:18:01,515 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 09:18:01,515 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 70 states and 107 transitions. [2021-10-28 09:18:01,518 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 41 [2021-10-28 09:18:01,518 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:01,518 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:01,519 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 09:18:01,519 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:18:01,519 INFO L791 eck$LassoCheckResult]: Stem: 277#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 278#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 295#L14 assume 0 == main_~i~0;main_~up~0 := 1; 296#L14-2 [2021-10-28 09:18:01,519 INFO L793 eck$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 [2021-10-28 09:18:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:01,520 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-28 09:18:01,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:01,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012450525] [2021-10-28 09:18:01,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:01,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:01,535 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:01,549 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:01,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1514671824, now seen corresponding path program 1 times [2021-10-28 09:18:01,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:01,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025541799] [2021-10-28 09:18:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:01,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:01,570 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:01,575 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:01,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1819047602, now seen corresponding path program 1 times [2021-10-28 09:18:01,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:01,587 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999242566] [2021-10-28 09:18:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:01,588 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:01,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:01,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:01,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999242566] [2021-10-28 09:18:01,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999242566] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:01,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:01,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:01,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729687128] [2021-10-28 09:18:01,704 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:01,705 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:01,705 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:01,705 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:01,705 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:18:01,705 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:01,705 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:01,706 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:01,706 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration5_Loop [2021-10-28 09:18:01,706 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:01,706 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:01,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:01,712 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:01,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:01,727 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:01,908 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:01,909 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:18:01,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:01,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:01,910 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:01,920 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:01,920 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:01,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 09:18:01,943 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:01,943 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: [] [2021-10-28 09:18:01,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:01,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:01,987 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:01,995 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:01,996 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:02,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 09:18:02,019 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:02,019 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: [] [2021-10-28 09:18:02,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-10-28 09:18:02,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,056 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 09:18:02,059 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:02,061 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:02,079 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:02,080 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: [] [2021-10-28 09:18:02,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,104 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 09:18:02,111 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:02,111 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:02,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,162 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,163 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 09:18:02,167 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:18:02,167 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:02,243 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:18:02,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,249 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:02,249 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:02,249 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:02,249 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:02,250 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:18:02,250 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,250 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:02,250 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:02,250 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration5_Loop [2021-10-28 09:18:02,250 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:02,250 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:02,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:02,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:02,276 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:02,281 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:02,458 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:02,458 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:18:02,458 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,460 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,463 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 [2021-10-28 09:18:02,473 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,473 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,474 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:02,474 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:02,479 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:02,480 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:02,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 09:18:02,495 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:02,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,539 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 09:18:02,543 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 [2021-10-28 09:18:02,558 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,558 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:02,558 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,559 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:02,559 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:02,567 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 09:18:02,567 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:02,587 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:02,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,627 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,631 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 [2021-10-28 09:18:02,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,643 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,643 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:02,643 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:02,649 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:02,649 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:02,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 09:18:02,662 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:02,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,707 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,708 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 09:18:02,715 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 [2021-10-28 09:18:02,723 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,723 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:02,723 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,724 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:02,724 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:02,727 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 09:18:02,727 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:02,734 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:02,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,757 INFO L490 LassoAnalysis]: Using template '2-nested'. [2021-10-28 09:18:02,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,758 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 09:18:02,763 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 [2021-10-28 09:18:02,772 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,772 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,772 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:02,772 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:02,776 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 09:18:02,776 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 09:18:02,803 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:02,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,844 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,845 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,852 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 [2021-10-28 09:18:02,863 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,864 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:02,864 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,864 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:02,864 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:02,867 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:02,867 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:02,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 09:18:02,883 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:02,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:02,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:02,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:02,927 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:02,931 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 [2021-10-28 09:18:02,942 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:02,942 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:02,942 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:02,942 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:02,946 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 09:18:02,946 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 09:18:02,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 09:18:02,963 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,006 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,007 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,008 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,011 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 [2021-10-28 09:18:03,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,021 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,021 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:03,024 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:03,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 09:18:03,035 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-10-28 09:18:03,064 INFO L490 LassoAnalysis]: Using template '3-nested'. [2021-10-28 09:18:03,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,066 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 09:18:03,068 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 [2021-10-28 09:18:03,079 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,079 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,080 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,080 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:03,095 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:03,096 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 09:18:03,115 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,159 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,163 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 [2021-10-28 09:18:03,174 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,174 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,174 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,174 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,174 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:03,178 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 09:18:03,178 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 09:18:03,190 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-28 09:18:03,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,213 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 09:18:03,216 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 [2021-10-28 09:18:03,224 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,224 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,224 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,224 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:03,228 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:03,228 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 09:18:03,263 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,302 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 09:18:03,315 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 [2021-10-28 09:18:03,326 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,326 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,327 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,327 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,327 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:03,332 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 09:18:03,332 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,337 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,359 INFO L490 LassoAnalysis]: Using template '4-nested'. [2021-10-28 09:18:03,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,360 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 09:18:03,362 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 [2021-10-28 09:18:03,370 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,370 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,370 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,370 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:03,374 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 09:18:03,374 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 09:18:03,396 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-28 09:18:03,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,419 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 09:18:03,423 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 [2021-10-28 09:18:03,431 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,431 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,432 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,432 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,432 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:03,435 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 09:18:03,435 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,447 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,470 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-10-28 09:18:03,471 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,471 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,484 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 [2021-10-28 09:18:03,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 09:18:03,493 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,493 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,493 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,493 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:03,498 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 09:18:03,498 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 09:18:03,527 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Ended with exit code 0 [2021-10-28 09:18:03,554 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,555 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 09:18:03,557 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 [2021-10-28 09:18:03,565 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:03,565 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,565 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,566 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,566 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:03,572 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 09:18:03,573 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,577 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,598 INFO L490 LassoAnalysis]: Using template '2-phase'. [2021-10-28 09:18:03,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,599 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 09:18:03,601 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 [2021-10-28 09:18:03,612 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:03,612 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:03,613 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,613 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,613 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:03,615 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 09:18:03,616 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 09:18:03,621 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,644 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,645 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 09:18:03,646 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 [2021-10-28 09:18:03,655 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:03,655 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:03,655 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,655 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,655 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,655 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:03,658 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:03,658 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,695 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,733 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,736 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 [2021-10-28 09:18:03,746 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:03,746 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:03,746 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,746 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,746 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:03,749 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 09:18:03,749 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 09:18:03,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 09:18:03,774 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,811 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,815 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,817 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 [2021-10-28 09:18:03,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 09:18:03,826 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:03,827 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:03,827 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,827 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,827 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,827 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 09:18:03,836 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:03,836 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:03,855 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,894 INFO L490 LassoAnalysis]: Using template '3-phase'. [2021-10-28 09:18:03,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,895 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,899 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 [2021-10-28 09:18:03,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 09:18:03,908 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:03,908 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 09:18:03,908 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,908 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:03,908 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:03,913 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:03,914 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 09:18:03,928 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:03,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:03,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:03,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:03,971 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:03,980 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 [2021-10-28 09:18:03,990 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:03,991 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 09:18:03,991 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:03,991 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:03,991 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:03,991 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:03,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-28 09:18:03,996 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 09:18:03,996 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,011 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,050 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,051 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,059 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 [2021-10-28 09:18:04,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-28 09:18:04,069 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,070 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 09:18:04,070 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,070 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,070 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:04,073 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:04,073 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 09:18:04,089 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,115 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-28 09:18:04,117 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 [2021-10-28 09:18:04,127 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,127 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 09:18:04,127 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:04,127 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,127 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:04,127 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:04,137 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 09:18:04,137 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,151 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,188 INFO L490 LassoAnalysis]: Using template '4-phase'. [2021-10-28 09:18:04,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,192 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,201 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 [2021-10-28 09:18:04,213 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,213 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,214 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,214 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,214 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:04,220 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 09:18:04,220 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 09:18:04,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-28 09:18:04,243 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,283 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,286 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 [2021-10-28 09:18:04,297 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,298 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,298 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:04,298 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,298 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:04,298 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:04,304 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 09:18:04,304 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-28 09:18:04,339 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,379 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,382 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 [2021-10-28 09:18:04,393 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,393 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,393 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,393 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,393 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:04,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-28 09:18:04,398 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 09:18:04,398 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 09:18:04,419 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,453 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Ended with exit code 0 [2021-10-28 09:18:04,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,454 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-28 09:18:04,455 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 [2021-10-28 09:18:04,465 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,465 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,465 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:04,465 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,465 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:04,465 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 09:18:04,470 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 09:18:04,470 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,498 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,531 INFO L490 LassoAnalysis]: Using template '2-lex'. [2021-10-28 09:18:04,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,535 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-28 09:18:04,540 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 [2021-10-28 09:18:04,548 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,548 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:04,548 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,548 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,548 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:04,550 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:04,550 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 09:18:04,571 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,592 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Ended with exit code 0 [2021-10-28 09:18:04,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,593 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-28 09:18:04,595 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 [2021-10-28 09:18:04,603 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,603 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:04,603 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:04,603 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,603 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:04,604 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:04,606 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 09:18:04,606 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,631 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,658 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-28 09:18:04,661 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 [2021-10-28 09:18:04,670 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,670 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:04,670 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,670 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,670 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:04,673 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:04,673 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 09:18:04,679 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Ended with exit code 0 [2021-10-28 09:18:04,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,704 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-28 09:18:04,706 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 [2021-10-28 09:18:04,730 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,730 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 09:18:04,730 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:04,730 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,730 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:04,730 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 09:18:04,732 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 09:18:04,732 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,751 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,787 INFO L490 LassoAnalysis]: Using template '3-lex'. [2021-10-28 09:18:04,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,788 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,790 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 [2021-10-28 09:18:04,801 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,801 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,801 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,802 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,802 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 09:18:04,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-28 09:18:04,807 INFO L401 nArgumentSynthesizer]: We have 18 Motzkin's Theorem applications. [2021-10-28 09:18:04,807 INFO L402 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2021-10-28 09:18:04,831 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Ended with exit code 0 [2021-10-28 09:18:04,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,865 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,872 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 [2021-10-28 09:18:04,884 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,884 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,884 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:04,884 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,885 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:04,885 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 09:18:04,889 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:04,890 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:04,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-28 09:18:04,911 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:04,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:04,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:04,951 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:04,954 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 [2021-10-28 09:18:04,965 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:04,966 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:04,966 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:04,966 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:04,966 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 09:18:04,970 INFO L401 nArgumentSynthesizer]: We have 18 Motzkin's Theorem applications. [2021-10-28 09:18:04,971 INFO L402 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2021-10-28 09:18:04,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-28 09:18:04,991 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:05,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:05,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:05,032 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:05,036 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 [2021-10-28 09:18:05,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-28 09:18:05,046 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 09:18:05,046 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 09:18:05,046 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:05,046 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:05,046 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:05,046 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 09:18:05,049 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 09:18:05,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:05,061 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:05,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:05,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:05,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:18:05,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:18:05,086 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) [2021-10-28 09:18:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:05,113 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-10-28 09:18:05,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:18:05,113 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 71 transitions. [2021-10-28 09:18:05,115 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2021-10-28 09:18:05,116 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 50 states and 69 transitions. [2021-10-28 09:18:05,117 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2021-10-28 09:18:05,117 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2021-10-28 09:18:05,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 69 transitions. [2021-10-28 09:18:05,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:05,118 INFO L681 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2021-10-28 09:18:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states and 69 transitions. [2021-10-28 09:18:05,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-28 09:18:05,122 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) [2021-10-28 09:18:05,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-28 09:18:05,129 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-28 09:18:05,129 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-28 09:18:05,129 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 09:18:05,129 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 57 transitions. [2021-10-28 09:18:05,131 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 09:18:05,131 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:05,131 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:05,132 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 09:18:05,132 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:18:05,132 INFO L791 eck$LassoCheckResult]: Stem: 407#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 408#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 429#L14 assume 0 == main_~i~0;main_~up~0 := 1; 438#L14-2 assume !(main_~i~0 == main_~range~0); 417#L17-1 [2021-10-28 09:18:05,132 INFO L793 eck$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 [2021-10-28 09:18:05,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:05,133 INFO L85 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 1 times [2021-10-28 09:18:05,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:05,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346018149] [2021-10-28 09:18:05,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:05,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:05,142 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:05,147 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:05,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1634880532, now seen corresponding path program 1 times [2021-10-28 09:18:05,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:05,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677010407] [2021-10-28 09:18:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:05,149 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:05,155 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:05,161 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:05,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:05,162 INFO L85 PathProgramCache]: Analyzing trace with hash 498642533, now seen corresponding path program 1 times [2021-10-28 09:18:05,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:05,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614973842] [2021-10-28 09:18:05,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:05,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:05,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:05,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614973842] [2021-10-28 09:18:05,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614973842] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:05,224 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:05,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:18:05,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731019527] [2021-10-28 09:18:05,281 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:05,282 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:05,282 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:05,282 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:05,282 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:18:05,282 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,282 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:05,283 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:05,283 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration6_Loop [2021-10-28 09:18:05,283 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:05,283 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:05,284 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,289 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,299 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,302 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,443 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:05,443 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:18:05,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:05,447 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:05,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-28 09:18:05,449 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:05,449 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:05,464 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:05,464 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: [] [2021-10-28 09:18:05,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Ended with exit code 0 [2021-10-28 09:18:05,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:05,487 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:05,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-28 09:18:05,488 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:05,488 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:05,497 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:05,498 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: [] [2021-10-28 09:18:05,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-10-28 09:18:05,520 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:05,521 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:05,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-28 09:18:05,523 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:05,523 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:05,538 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:05,538 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: [] [2021-10-28 09:18:05,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:05,563 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:05,564 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:05,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-28 09:18:05,567 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:05,567 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:05,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-28 09:18:05,637 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:05,638 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:05,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-28 09:18:05,639 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:18:05,639 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:05,856 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:18:05,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Ended with exit code 0 [2021-10-28 09:18:05,860 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:05,860 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:05,860 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:05,860 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:05,860 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:18:05,860 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:05,860 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:05,860 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:05,860 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration6_Loop [2021-10-28 09:18:05,860 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:05,860 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:05,862 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,865 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:05,875 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:06,013 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:06,014 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:18:06,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,018 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-28 09:18:06,022 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 [2021-10-28 09:18:06,031 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:06,031 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:06,031 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:06,031 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:06,032 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:06,033 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:06,056 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:06,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:06,079 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,080 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-28 09:18:06,082 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 [2021-10-28 09:18:06,091 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:06,091 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:06,091 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:06,091 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:06,091 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:06,092 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:18:06,092 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:06,119 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:06,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-28 09:18:06,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,144 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-28 09:18:06,146 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 [2021-10-28 09:18:06,154 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:06,154 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:06,154 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:06,154 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:06,155 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:06,155 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:06,158 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:06,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:06,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,181 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-28 09:18:06,183 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 [2021-10-28 09:18:06,191 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:06,191 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:06,192 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:06,192 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:06,192 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:06,193 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 09:18:06,194 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:06,200 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:18:06,203 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:18:06,203 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:18:06,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,205 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-28 09:18:06,207 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:18:06,208 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:18:06,208 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:18:06,208 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 09:18:06,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Ended with exit code 0 [2021-10-28 09:18:06,247 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:18:06,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:06,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:06,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:06,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:18:06,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:06,349 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 [2021-10-28 09:18:06,349 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) [2021-10-28 09:18:06,419 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. [2021-10-28 09:18:06,421 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 [2021-10-28 09:18:06,421 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) [2021-10-28 09:18:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2021-10-28 09:18:06,422 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 4 letters. Loop has 6 letters. [2021-10-28 09:18:06,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:06,423 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 09:18:06,423 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:06,424 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 4 letters. Loop has 12 letters. [2021-10-28 09:18:06,424 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:06,424 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 114 states and 153 transitions. [2021-10-28 09:18:06,427 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 42 [2021-10-28 09:18:06,429 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 114 states to 108 states and 144 transitions. [2021-10-28 09:18:06,430 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 62 [2021-10-28 09:18:06,430 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 67 [2021-10-28 09:18:06,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 144 transitions. [2021-10-28 09:18:06,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:06,431 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 144 transitions. [2021-10-28 09:18:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 144 transitions. [2021-10-28 09:18:06,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-10-28 09:18:06,443 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) [2021-10-28 09:18:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2021-10-28 09:18:06,445 INFO L704 BuchiCegarLoop]: Abstraction has 93 states and 128 transitions. [2021-10-28 09:18:06,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:06,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:18:06,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:18:06,446 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) [2021-10-28 09:18:06,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:06,477 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2021-10-28 09:18:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:18:06,482 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 111 states and 142 transitions. [2021-10-28 09:18:06,484 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 50 [2021-10-28 09:18:06,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 111 states to 92 states and 118 transitions. [2021-10-28 09:18:06,485 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 67 [2021-10-28 09:18:06,486 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 67 [2021-10-28 09:18:06,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 118 transitions. [2021-10-28 09:18:06,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:06,486 INFO L681 BuchiCegarLoop]: Abstraction has 92 states and 118 transitions. [2021-10-28 09:18:06,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states and 118 transitions. [2021-10-28 09:18:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 41. [2021-10-28 09:18:06,490 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) [2021-10-28 09:18:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-10-28 09:18:06,491 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-10-28 09:18:06,491 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-10-28 09:18:06,492 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 09:18:06,492 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 55 transitions. [2021-10-28 09:18:06,493 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 09:18:06,493 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:06,493 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:06,493 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 09:18:06,493 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:18:06,494 INFO L791 eck$LassoCheckResult]: Stem: 823#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 824#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 843#L14 assume 0 == main_~i~0;main_~up~0 := 1; 857#L14-2 assume !(main_~i~0 == main_~range~0); 833#L17-1 [2021-10-28 09:18:06,494 INFO L793 eck$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 [2021-10-28 09:18:06,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:06,494 INFO L85 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 2 times [2021-10-28 09:18:06,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:06,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109440519] [2021-10-28 09:18:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:06,495 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:06,500 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:06,505 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:06,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1634880594, now seen corresponding path program 1 times [2021-10-28 09:18:06,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:06,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267635371] [2021-10-28 09:18:06,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:06,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:06,511 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:06,516 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:06,517 INFO L85 PathProgramCache]: Analyzing trace with hash 498642595, now seen corresponding path program 1 times [2021-10-28 09:18:06,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:06,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659184431] [2021-10-28 09:18:06,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:06,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:06,523 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:06,530 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:06,587 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:06,587 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:06,587 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:06,587 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:06,588 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:18:06,588 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,588 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:06,588 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:06,588 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-10-28 09:18:06,588 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:06,588 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:06,589 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:06,600 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:06,603 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:06,606 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:06,728 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:06,728 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:18:06,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,731 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:06,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:06,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2021-10-28 09:18:06,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Ended with exit code 0 [2021-10-28 09:18:06,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:06,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:06,793 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:06,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2021-10-28 09:18:06,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:18:06,801 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:07,100 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:18:07,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:07,103 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:07,103 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:07,103 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:07,103 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:07,103 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:18:07,104 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,104 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:07,104 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:07,104 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-10-28 09:18:07,104 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:07,104 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:07,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:07,258 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:07,258 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:18:07,258 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,260 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2021-10-28 09:18:07,261 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 [2021-10-28 09:18:07,270 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:07,270 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:07,270 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:07,270 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:07,270 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:07,272 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 09:18:07,272 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:07,275 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:18:07,278 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:18:07,278 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 09:18:07,278 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,279 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2021-10-28 09:18:07,280 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:18:07,280 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:18:07,280 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:18:07,280 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 [] [2021-10-28 09:18:07,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:07,303 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:18:07,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:18:07,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:07,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:07,417 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 [2021-10-28 09:18:07,417 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) [2021-10-28 09:18:07,463 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. [2021-10-28 09:18:07,466 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 [2021-10-28 09:18:07,466 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) [2021-10-28 09:18:07,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-10-28 09:18:07,467 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 6 letters. [2021-10-28 09:18:07,468 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:07,468 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 09:18:07,469 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:07,469 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 12 letters. [2021-10-28 09:18:07,470 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:07,471 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 90 states and 115 transitions. [2021-10-28 09:18:07,473 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 09:18:07,475 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 90 states to 77 states and 98 transitions. [2021-10-28 09:18:07,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2021-10-28 09:18:07,476 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2021-10-28 09:18:07,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 98 transitions. [2021-10-28 09:18:07,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:07,476 INFO L681 BuchiCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-10-28 09:18:07,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 98 transitions. [2021-10-28 09:18:07,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-28 09:18:07,482 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) [2021-10-28 09:18:07,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-10-28 09:18:07,484 INFO L704 BuchiCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-10-28 09:18:07,484 INFO L587 BuchiCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-10-28 09:18:07,484 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 09:18:07,484 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 92 transitions. [2021-10-28 09:18:07,485 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 09:18:07,486 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:07,486 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:07,486 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:07,487 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:18:07,487 INFO L791 eck$LassoCheckResult]: Stem: 1009#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 1010#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1067#L14 assume !(0 == main_~i~0); 1068#L14-2 assume !(main_~i~0 == main_~range~0); 1021#L17-1 assume !(1 == main_~up~0); 1022#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1058#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 1060#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1078#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1077#L14-2 assume !(main_~i~0 == main_~range~0); 1076#L17-1 [2021-10-28 09:18:07,487 INFO L793 eck$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 [2021-10-28 09:18:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:07,488 INFO L85 PathProgramCache]: Analyzing trace with hash -255352415, now seen corresponding path program 1 times [2021-10-28 09:18:07,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:07,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589035297] [2021-10-28 09:18:07,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:07,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:07,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:07,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589035297] [2021-10-28 09:18:07,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589035297] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:07,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330676814] [2021-10-28 09:18:07,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:07,518 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:07,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,532 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-28 09:18:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 09:18:07,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:07,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330676814] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:07,614 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:07,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 09:18:07,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614810100] [2021-10-28 09:18:07,615 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:07,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1634880594, now seen corresponding path program 2 times [2021-10-28 09:18:07,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:07,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010896555] [2021-10-28 09:18:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:07,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:07,622 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:07,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:07,627 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:07,700 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:07,700 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:07,700 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:07,700 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:07,701 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:18:07,701 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,701 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:07,701 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:07,701 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-10-28 09:18:07,701 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:07,701 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:07,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,707 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,714 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:07,821 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:07,821 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:18:07,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,822 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2021-10-28 09:18:07,824 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:07,824 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:07,833 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:07,833 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: [] [2021-10-28 09:18:07,854 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Ended with exit code 0 [2021-10-28 09:18:07,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,855 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2021-10-28 09:18:07,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:07,857 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:07,870 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:07,870 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: [] [2021-10-28 09:18:07,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:07,893 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,899 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2021-10-28 09:18:07,901 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:07,901 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:07,917 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 09:18:07,917 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: [] [2021-10-28 09:18:07,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2021-10-28 09:18:07,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:07,942 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:07,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2021-10-28 09:18:07,944 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:07,944 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:08,002 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Ended with exit code 0 [2021-10-28 09:18:08,003 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:08,019 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:08,021 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:18:08,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:08,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2021-10-28 09:18:08,311 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:18:08,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:08,314 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:08,314 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:08,314 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:08,314 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:08,314 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:18:08,314 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,315 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:08,315 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:08,315 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-10-28 09:18:08,315 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:08,315 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:08,316 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:08,319 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:08,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:08,335 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:08,448 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:08,449 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:18:08,449 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:08,451 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:08,453 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 [2021-10-28 09:18:08,464 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:08,464 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:08,464 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:08,465 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:08,466 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:08,467 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:08,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2021-10-28 09:18:08,487 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:08,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:08,522 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:08,527 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:08,530 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 [2021-10-28 09:18:08,547 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:08,547 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:08,547 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:08,547 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:08,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:08,548 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:18:08,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:08,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Waiting until timeout for monitored process [2021-10-28 09:18:08,563 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:08,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:08,602 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,603 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:08,604 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:08,607 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 [2021-10-28 09:18:08,618 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:08,619 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:08,619 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:08,619 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:08,622 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 09:18:08,622 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 09:18:08,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Waiting until timeout for monitored process [2021-10-28 09:18:08,635 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 09:18:08,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Ended with exit code 0 [2021-10-28 09:18:08,671 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:08,672 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:08,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Waiting until timeout for monitored process [2021-10-28 09:18:08,673 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 [2021-10-28 09:18:08,682 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:08,682 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:08,682 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:08,682 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 09:18:08,683 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:08,684 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 09:18:08,684 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:08,687 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:18:08,691 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-28 09:18:08,691 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:18:08,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:08,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:08,693 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:08,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Waiting until timeout for monitored process [2021-10-28 09:18:08,694 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:18:08,694 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:18:08,694 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:18:08,694 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 [] [2021-10-28 09:18:08,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Ended with exit code 0 [2021-10-28 09:18:08,717 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:18:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:08,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:18:08,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,840 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 [2021-10-28 09:18:08,840 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) [2021-10-28 09:18:08,877 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. [2021-10-28 09:18:08,880 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 [2021-10-28 09:18:08,880 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) [2021-10-28 09:18:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-10-28 09:18:08,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 09:18:08,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:08,881 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:18:08,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:08,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:08,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:08,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:18:08,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:08,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:08,997 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 [2021-10-28 09:18:08,998 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) [2021-10-28 09:18:09,046 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. [2021-10-28 09:18:09,047 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 [2021-10-28 09:18:09,047 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) [2021-10-28 09:18:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2021-10-28 09:18:09,048 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 09:18:09,048 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:09,048 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 09:18:09,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:09,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:09,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:18:09,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:09,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,161 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 [2021-10-28 09:18:09,161 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) [2021-10-28 09:18:09,215 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. [2021-10-28 09:18:09,216 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 [2021-10-28 09:18:09,216 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) [2021-10-28 09:18:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 26 transitions. [2021-10-28 09:18:09,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 09:18:09,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:09,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 16 letters. Loop has 6 letters. [2021-10-28 09:18:09,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:09,227 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 10 letters. Loop has 12 letters. [2021-10-28 09:18:09,228 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:09,229 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 112 states and 146 transitions. [2021-10-28 09:18:09,231 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 35 [2021-10-28 09:18:09,233 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 112 states to 84 states and 108 transitions. [2021-10-28 09:18:09,234 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-28 09:18:09,234 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2021-10-28 09:18:09,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 108 transitions. [2021-10-28 09:18:09,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:09,235 INFO L681 BuchiCegarLoop]: Abstraction has 84 states and 108 transitions. [2021-10-28 09:18:09,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states and 108 transitions. [2021-10-28 09:18:09,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2021-10-28 09:18:09,242 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) [2021-10-28 09:18:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2021-10-28 09:18:09,246 INFO L704 BuchiCegarLoop]: Abstraction has 49 states and 66 transitions. [2021-10-28 09:18:09,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:18:09,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:18:09,266 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) [2021-10-28 09:18:09,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:09,318 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2021-10-28 09:18:09,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:18:09,318 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 154 transitions. [2021-10-28 09:18:09,320 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2021-10-28 09:18:09,321 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 117 states and 152 transitions. [2021-10-28 09:18:09,322 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-10-28 09:18:09,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:09,324 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-10-28 09:18:09,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 152 transitions. [2021-10-28 09:18:09,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:09,325 INFO L681 BuchiCegarLoop]: Abstraction has 117 states and 152 transitions. [2021-10-28 09:18:09,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 152 transitions. [2021-10-28 09:18:09,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-10-28 09:18:09,354 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) [2021-10-28 09:18:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2021-10-28 09:18:09,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:09,360 INFO L704 BuchiCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-10-28 09:18:09,361 INFO L587 BuchiCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-10-28 09:18:09,361 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 09:18:09,361 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 128 transitions. [2021-10-28 09:18:09,362 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2021-10-28 09:18:09,362 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:09,362 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:09,363 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 09:18:09,363 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 09:18:09,363 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 [2021-10-28 09:18:09,363 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 [2021-10-28 09:18:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,364 INFO L85 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 3 times [2021-10-28 09:18:09,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305760080] [2021-10-28 09:18:09,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:09,372 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:09,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:09,379 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:09,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:09,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1416950548, now seen corresponding path program 1 times [2021-10-28 09:18:09,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:09,383 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756089743] [2021-10-28 09:18:09,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,384 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:09,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756089743] [2021-10-28 09:18:09,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756089743] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:09,555 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794419546] [2021-10-28 09:18:09,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:09,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:09,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:09,556 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:09,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-28 09:18:09,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:18:09,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:09,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:09,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794419546] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:09,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:09,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-10-28 09:18:09,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641702945] [2021-10-28 09:18:09,813 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 09:18:09,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:09,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 09:18:09,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:18:09,814 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) [2021-10-28 09:18:10,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:10,061 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-10-28 09:18:10,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 09:18:10,061 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 111 transitions. [2021-10-28 09:18:10,063 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 09:18:10,064 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 93 states and 104 transitions. [2021-10-28 09:18:10,064 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-28 09:18:10,064 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2021-10-28 09:18:10,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 104 transitions. [2021-10-28 09:18:10,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:10,065 INFO L681 BuchiCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-10-28 09:18:10,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 104 transitions. [2021-10-28 09:18:10,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-10-28 09:18:10,068 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) [2021-10-28 09:18:10,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-10-28 09:18:10,069 INFO L704 BuchiCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-10-28 09:18:10,069 INFO L587 BuchiCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-10-28 09:18:10,069 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 09:18:10,069 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 84 states and 95 transitions. [2021-10-28 09:18:10,070 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 09:18:10,070 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:10,070 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:10,071 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-28 09:18:10,071 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:10,072 INFO L791 eck$LassoCheckResult]: Stem: 2072#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2073#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2093#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2092#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2086#L17-1 assume !(1 == main_~up~0); 2080#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2081#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2083#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2132#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2121#L14-2 [2021-10-28 09:18:10,072 INFO L793 eck$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 [2021-10-28 09:18:10,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1761729718, now seen corresponding path program 1 times [2021-10-28 09:18:10,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540356081] [2021-10-28 09:18:10,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,073 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:10,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:10,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540356081] [2021-10-28 09:18:10,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540356081] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:10,094 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:10,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:18:10,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76704396] [2021-10-28 09:18:10,095 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:10,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,096 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 2 times [2021-10-28 09:18:10,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818657707] [2021-10-28 09:18:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,096 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:10,102 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:10,107 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:10,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:10,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:18:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:18:10,183 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) [2021-10-28 09:18:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:10,208 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-28 09:18:10,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:18:10,208 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 94 transitions. [2021-10-28 09:18:10,210 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 09:18:10,211 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 83 states and 93 transitions. [2021-10-28 09:18:10,211 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-10-28 09:18:10,211 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-10-28 09:18:10,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 93 transitions. [2021-10-28 09:18:10,211 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:10,211 INFO L681 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-28 09:18:10,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 93 transitions. [2021-10-28 09:18:10,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-28 09:18:10,214 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) [2021-10-28 09:18:10,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-10-28 09:18:10,215 INFO L704 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-28 09:18:10,215 INFO L587 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-28 09:18:10,215 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-28 09:18:10,215 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 83 states and 93 transitions. [2021-10-28 09:18:10,216 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 09:18:10,216 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:10,216 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:10,217 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:10,217 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:10,217 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 [2021-10-28 09:18:10,217 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 [2021-10-28 09:18:10,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,218 INFO L85 PathProgramCache]: Analyzing trace with hash -758230216, now seen corresponding path program 1 times [2021-10-28 09:18:10,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692239848] [2021-10-28 09:18:10,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:10,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:10,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692239848] [2021-10-28 09:18:10,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692239848] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:10,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801313960] [2021-10-28 09:18:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:10,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:10,247 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:10,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-28 09:18:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:10,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:18:10,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:10,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:10,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801313960] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:10,357 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:10,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 09:18:10,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988594283] [2021-10-28 09:18:10,358 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:10,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 3 times [2021-10-28 09:18:10,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868579114] [2021-10-28 09:18:10,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:10,373 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:10,389 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:10,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:10,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:18:10,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:18:10,448 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) [2021-10-28 09:18:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:10,496 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-10-28 09:18:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:18:10,497 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 85 transitions. [2021-10-28 09:18:10,498 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:10,499 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 75 states and 83 transitions. [2021-10-28 09:18:10,499 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-28 09:18:10,499 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-28 09:18:10,499 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 83 transitions. [2021-10-28 09:18:10,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:10,499 INFO L681 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-28 09:18:10,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states and 83 transitions. [2021-10-28 09:18:10,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 09:18:10,502 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) [2021-10-28 09:18:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-10-28 09:18:10,502 INFO L704 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-28 09:18:10,503 INFO L587 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-28 09:18:10,504 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-28 09:18:10,504 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 75 states and 83 transitions. [2021-10-28 09:18:10,505 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:10,505 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:10,505 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:10,506 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1] [2021-10-28 09:18:10,506 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:10,506 INFO L791 eck$LassoCheckResult]: Stem: 2445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2446#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2463#L14 assume !(0 == main_~i~0); 2471#L14-2 assume !(main_~i~0 == main_~range~0); 2470#L17-1 assume !(1 == main_~up~0); 2469#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2466#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2449#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2450#L14 assume !(0 == main_~i~0); 2460#L14-2 assume !(main_~i~0 == main_~range~0); 2462#L17-1 assume !(1 == main_~up~0); 2495#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2491#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2492#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2485#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2486#L14-2 [2021-10-28 09:18:10,506 INFO L793 eck$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 [2021-10-28 09:18:10,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1377251387, now seen corresponding path program 2 times [2021-10-28 09:18:10,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583429988] [2021-10-28 09:18:10,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:10,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:10,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583429988] [2021-10-28 09:18:10,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583429988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:10,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614213232] [2021-10-28 09:18:10,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:18:10,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:10,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:10,558 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:10,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-28 09:18:10,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:18:10,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:10,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 09:18:10,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:10,676 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:10,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614213232] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:10,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:10,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 09:18:10,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43016897] [2021-10-28 09:18:10,678 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,678 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 4 times [2021-10-28 09:18:10,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474742657] [2021-10-28 09:18:10,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,679 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:10,683 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:10,687 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:10,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:10,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:18:10,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:18:10,743 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) [2021-10-28 09:18:10,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:10,803 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-10-28 09:18:10,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 09:18:10,804 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 99 states and 107 transitions. [2021-10-28 09:18:10,805 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:10,806 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 99 states to 97 states and 105 transitions. [2021-10-28 09:18:10,807 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2021-10-28 09:18:10,807 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2021-10-28 09:18:10,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 105 transitions. [2021-10-28 09:18:10,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:10,807 INFO L681 BuchiCegarLoop]: Abstraction has 97 states and 105 transitions. [2021-10-28 09:18:10,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 105 transitions. [2021-10-28 09:18:10,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2021-10-28 09:18:10,810 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) [2021-10-28 09:18:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-10-28 09:18:10,811 INFO L704 BuchiCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-28 09:18:10,811 INFO L587 BuchiCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-28 09:18:10,811 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-28 09:18:10,811 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 95 transitions. [2021-10-28 09:18:10,812 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:10,812 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:10,812 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:10,814 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 3, 1, 1] [2021-10-28 09:18:10,814 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:10,814 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 [2021-10-28 09:18:10,815 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 [2021-10-28 09:18:10,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:10,815 INFO L85 PathProgramCache]: Analyzing trace with hash 237666774, now seen corresponding path program 3 times [2021-10-28 09:18:10,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:10,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242828257] [2021-10-28 09:18:10,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:10,816 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:10,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:10,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242828257] [2021-10-28 09:18:10,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242828257] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:10,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271697274] [2021-10-28 09:18:10,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:18:10,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:10,912 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:10,929 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-28 09:18:11,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:18:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:11,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:18:11,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:11,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271697274] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:11,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:11,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 09:18:11,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39992360] [2021-10-28 09:18:11,077 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:11,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 5 times [2021-10-28 09:18:11,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:11,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025534690] [2021-10-28 09:18:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:11,079 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:11,088 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:11,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:11,099 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:11,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:11,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 09:18:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 09:18:11,156 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) [2021-10-28 09:18:11,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:11,296 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-10-28 09:18:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:18:11,297 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 131 states and 139 transitions. [2021-10-28 09:18:11,298 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:11,300 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 131 states to 127 states and 135 transitions. [2021-10-28 09:18:11,300 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-28 09:18:11,300 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-28 09:18:11,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 135 transitions. [2021-10-28 09:18:11,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:11,301 INFO L681 BuchiCegarLoop]: Abstraction has 127 states and 135 transitions. [2021-10-28 09:18:11,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 135 transitions. [2021-10-28 09:18:11,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2021-10-28 09:18:11,304 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) [2021-10-28 09:18:11,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-10-28 09:18:11,305 INFO L704 BuchiCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-10-28 09:18:11,305 INFO L587 BuchiCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-10-28 09:18:11,305 INFO L425 BuchiCegarLoop]: ======== Iteration 14============ [2021-10-28 09:18:11,305 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 119 transitions. [2021-10-28 09:18:11,306 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:11,306 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:11,306 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:11,309 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 1, 1] [2021-10-28 09:18:11,309 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:11,309 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 [2021-10-28 09:18:11,310 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 [2021-10-28 09:18:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash 170050488, now seen corresponding path program 4 times [2021-10-28 09:18:11,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:11,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208403369] [2021-10-28 09:18:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:11,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:11,376 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:11,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:11,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208403369] [2021-10-28 09:18:11,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208403369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:11,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279427532] [2021-10-28 09:18:11,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:18:11,377 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:11,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:11,380 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:11,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-28 09:18:11,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:18:11,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:11,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:18:11,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:11,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279427532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:11,566 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:11,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-28 09:18:11,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376436284] [2021-10-28 09:18:11,567 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:11,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:11,568 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 6 times [2021-10-28 09:18:11,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:11,568 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032765379] [2021-10-28 09:18:11,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:11,569 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:11,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:11,573 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:11,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:11,577 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:11,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:11,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 09:18:11,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 09:18:11,631 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) [2021-10-28 09:18:11,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:11,749 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-10-28 09:18:11,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 09:18:11,750 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 167 states and 175 transitions. [2021-10-28 09:18:11,752 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:11,753 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 167 states to 163 states and 171 transitions. [2021-10-28 09:18:11,753 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 101 [2021-10-28 09:18:11,753 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 101 [2021-10-28 09:18:11,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 171 transitions. [2021-10-28 09:18:11,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:11,754 INFO L681 BuchiCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-10-28 09:18:11,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 171 transitions. [2021-10-28 09:18:11,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 135. [2021-10-28 09:18:11,757 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) [2021-10-28 09:18:11,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2021-10-28 09:18:11,758 INFO L704 BuchiCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-10-28 09:18:11,758 INFO L587 BuchiCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-10-28 09:18:11,758 INFO L425 BuchiCegarLoop]: ======== Iteration 15============ [2021-10-28 09:18:11,758 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 135 states and 143 transitions. [2021-10-28 09:18:11,759 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:11,760 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:11,760 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:11,761 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 7, 7, 7, 7, 1, 1] [2021-10-28 09:18:11,761 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:11,762 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 [2021-10-28 09:18:11,762 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 [2021-10-28 09:18:11,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:11,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1502788966, now seen corresponding path program 5 times [2021-10-28 09:18:11,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:11,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570781994] [2021-10-28 09:18:11,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:11,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:11,854 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:11,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:11,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570781994] [2021-10-28 09:18:11,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570781994] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:11,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563023856] [2021-10-28 09:18:11,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 09:18:11,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:11,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:11,857 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:11,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-28 09:18:11,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 09:18:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 09:18:11,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:12,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563023856] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:12,138 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:12,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-10-28 09:18:12,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232796859] [2021-10-28 09:18:12,139 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:12,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 7 times [2021-10-28 09:18:12,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:12,140 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018774418] [2021-10-28 09:18:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:12,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:12,144 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:12,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:12,148 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:12,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:12,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 09:18:12,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-28 09:18:12,213 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) [2021-10-28 09:18:12,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:12,368 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2021-10-28 09:18:12,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:18:12,369 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 203 states and 211 transitions. [2021-10-28 09:18:12,371 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:12,372 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 203 states to 199 states and 207 transitions. [2021-10-28 09:18:12,373 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 125 [2021-10-28 09:18:12,373 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 125 [2021-10-28 09:18:12,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 207 transitions. [2021-10-28 09:18:12,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:12,373 INFO L681 BuchiCegarLoop]: Abstraction has 199 states and 207 transitions. [2021-10-28 09:18:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states and 207 transitions. [2021-10-28 09:18:12,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2021-10-28 09:18:12,377 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) [2021-10-28 09:18:12,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2021-10-28 09:18:12,378 INFO L704 BuchiCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-10-28 09:18:12,378 INFO L587 BuchiCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-10-28 09:18:12,378 INFO L425 BuchiCegarLoop]: ======== Iteration 16============ [2021-10-28 09:18:12,378 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 159 states and 167 transitions. [2021-10-28 09:18:12,379 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:12,379 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:12,379 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:12,380 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 9, 9, 9, 9, 1, 1] [2021-10-28 09:18:12,381 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:12,381 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 [2021-10-28 09:18:12,381 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 [2021-10-28 09:18:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash 815169148, now seen corresponding path program 6 times [2021-10-28 09:18:12,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:12,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027942459] [2021-10-28 09:18:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:12,382 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:12,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:12,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:12,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027942459] [2021-10-28 09:18:12,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027942459] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:12,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385727198] [2021-10-28 09:18:12,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 09:18:12,488 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:12,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:12,491 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:12,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-28 09:18:12,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-28 09:18:12,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:12,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 09:18:12,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:12,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385727198] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:12,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:12,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-10-28 09:18:12,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616700361] [2021-10-28 09:18:12,841 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:12,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:12,842 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 8 times [2021-10-28 09:18:12,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:12,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366381604] [2021-10-28 09:18:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:12,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:12,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:12,848 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:12,851 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:12,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 09:18:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-28 09:18:12,912 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) [2021-10-28 09:18:13,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:13,088 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2021-10-28 09:18:13,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:18:13,089 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 201 states and 209 transitions. [2021-10-28 09:18:13,091 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:13,093 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 201 states to 197 states and 205 transitions. [2021-10-28 09:18:13,093 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2021-10-28 09:18:13,093 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 111 [2021-10-28 09:18:13,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 197 states and 205 transitions. [2021-10-28 09:18:13,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:13,094 INFO L681 BuchiCegarLoop]: Abstraction has 197 states and 205 transitions. [2021-10-28 09:18:13,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states and 205 transitions. [2021-10-28 09:18:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2021-10-28 09:18:13,098 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) [2021-10-28 09:18:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 191 transitions. [2021-10-28 09:18:13,099 INFO L704 BuchiCegarLoop]: Abstraction has 183 states and 191 transitions. [2021-10-28 09:18:13,100 INFO L587 BuchiCegarLoop]: Abstraction has 183 states and 191 transitions. [2021-10-28 09:18:13,100 INFO L425 BuchiCegarLoop]: ======== Iteration 17============ [2021-10-28 09:18:13,100 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 183 states and 191 transitions. [2021-10-28 09:18:13,101 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:13,102 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:13,102 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:13,103 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 11, 11, 11, 11, 1, 1] [2021-10-28 09:18:13,103 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:13,103 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 [2021-10-28 09:18:13,104 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 [2021-10-28 09:18:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:13,104 INFO L85 PathProgramCache]: Analyzing trace with hash -2023032994, now seen corresponding path program 7 times [2021-10-28 09:18:13,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:13,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486744220] [2021-10-28 09:18:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:13,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:13,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:13,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486744220] [2021-10-28 09:18:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486744220] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:13,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909862581] [2021-10-28 09:18:13,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 09:18:13,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:13,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:13,250 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:13,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-28 09:18:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:13,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 09:18:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:13,658 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:13,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909862581] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:13,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:13,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-10-28 09:18:13,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043701923] [2021-10-28 09:18:13,659 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:13,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:13,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 9 times [2021-10-28 09:18:13,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:13,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339167877] [2021-10-28 09:18:13,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:13,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:13,665 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:13,668 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:13,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:18:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:18:13,728 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) [2021-10-28 09:18:13,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:13,877 INFO L93 Difference]: Finished difference Result 275 states and 283 transitions. [2021-10-28 09:18:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 09:18:13,877 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 275 states and 283 transitions. [2021-10-28 09:18:13,879 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:13,882 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 275 states to 271 states and 279 transitions. [2021-10-28 09:18:13,882 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2021-10-28 09:18:13,882 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2021-10-28 09:18:13,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 279 transitions. [2021-10-28 09:18:13,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:13,882 INFO L681 BuchiCegarLoop]: Abstraction has 271 states and 279 transitions. [2021-10-28 09:18:13,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states and 279 transitions. [2021-10-28 09:18:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 207. [2021-10-28 09:18:13,887 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) [2021-10-28 09:18:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 215 transitions. [2021-10-28 09:18:13,888 INFO L704 BuchiCegarLoop]: Abstraction has 207 states and 215 transitions. [2021-10-28 09:18:13,888 INFO L587 BuchiCegarLoop]: Abstraction has 207 states and 215 transitions. [2021-10-28 09:18:13,888 INFO L425 BuchiCegarLoop]: ======== Iteration 18============ [2021-10-28 09:18:13,888 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 207 states and 215 transitions. [2021-10-28 09:18:13,890 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:13,890 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:13,890 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:13,892 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 13, 13, 13, 13, 1, 1] [2021-10-28 09:18:13,892 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:13,892 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 [2021-10-28 09:18:13,893 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 [2021-10-28 09:18:13,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 989277504, now seen corresponding path program 8 times [2021-10-28 09:18:13,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:13,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119718642] [2021-10-28 09:18:13,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:13,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:13,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:14,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:14,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119718642] [2021-10-28 09:18:14,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119718642] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:14,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120505828] [2021-10-28 09:18:14,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:18:14,100 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:14,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:14,101 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:14,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-28 09:18:14,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:18:14,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:14,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 09:18:14,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:14,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120505828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:14,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:14,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-10-28 09:18:14,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961893213] [2021-10-28 09:18:14,498 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:14,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 10 times [2021-10-28 09:18:14,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:14,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042267027] [2021-10-28 09:18:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:14,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:14,504 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:14,507 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:14,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:14,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 09:18:14,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-10-28 09:18:14,575 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) [2021-10-28 09:18:14,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:14,742 INFO L93 Difference]: Finished difference Result 243 states and 251 transitions. [2021-10-28 09:18:14,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 09:18:14,742 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 243 states and 251 transitions. [2021-10-28 09:18:14,745 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:14,747 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 243 states to 239 states and 247 transitions. [2021-10-28 09:18:14,747 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2021-10-28 09:18:14,748 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 129 [2021-10-28 09:18:14,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 239 states and 247 transitions. [2021-10-28 09:18:14,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:14,748 INFO L681 BuchiCegarLoop]: Abstraction has 239 states and 247 transitions. [2021-10-28 09:18:14,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states and 247 transitions. [2021-10-28 09:18:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2021-10-28 09:18:14,754 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) [2021-10-28 09:18:14,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2021-10-28 09:18:14,756 INFO L704 BuchiCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-10-28 09:18:14,756 INFO L587 BuchiCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-10-28 09:18:14,756 INFO L425 BuchiCegarLoop]: ======== Iteration 19============ [2021-10-28 09:18:14,756 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 231 states and 239 transitions. [2021-10-28 09:18:14,758 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:14,758 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:14,759 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:14,767 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [16, 15, 15, 15, 15, 15, 1, 1] [2021-10-28 09:18:14,767 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:14,767 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 [2021-10-28 09:18:14,768 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 [2021-10-28 09:18:14,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:14,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1400397790, now seen corresponding path program 9 times [2021-10-28 09:18:14,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:14,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919976027] [2021-10-28 09:18:14,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:14,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:15,020 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:15,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:15,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919976027] [2021-10-28 09:18:15,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919976027] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:15,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947280526] [2021-10-28 09:18:15,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:18:15,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:15,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:15,022 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:15,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-28 09:18:15,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 09:18:15,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 09:18:15,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:15,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947280526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:15,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:15,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-10-28 09:18:15,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91516954] [2021-10-28 09:18:15,578 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:15,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:15,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 11 times [2021-10-28 09:18:15,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:15,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978155385] [2021-10-28 09:18:15,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:15,579 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:15,600 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:15,603 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:15,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:15,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 09:18:15,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-10-28 09:18:15,666 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) [2021-10-28 09:18:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:15,889 INFO L93 Difference]: Finished difference Result 267 states and 275 transitions. [2021-10-28 09:18:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 09:18:15,889 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 275 transitions. [2021-10-28 09:18:15,892 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:15,894 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 263 states and 271 transitions. [2021-10-28 09:18:15,894 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2021-10-28 09:18:15,895 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-10-28 09:18:15,895 INFO L73 IsDeterministic]: Start isDeterministic. Operand 263 states and 271 transitions. [2021-10-28 09:18:15,895 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:15,895 INFO L681 BuchiCegarLoop]: Abstraction has 263 states and 271 transitions. [2021-10-28 09:18:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states and 271 transitions. [2021-10-28 09:18:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 255. [2021-10-28 09:18:15,901 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) [2021-10-28 09:18:15,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 263 transitions. [2021-10-28 09:18:15,902 INFO L704 BuchiCegarLoop]: Abstraction has 255 states and 263 transitions. [2021-10-28 09:18:15,903 INFO L587 BuchiCegarLoop]: Abstraction has 255 states and 263 transitions. [2021-10-28 09:18:15,903 INFO L425 BuchiCegarLoop]: ======== Iteration 20============ [2021-10-28 09:18:15,906 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 263 transitions. [2021-10-28 09:18:15,908 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 09:18:15,908 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:15,908 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:15,909 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [18, 17, 16, 15, 15, 15, 2, 2, 2, 1, 1, 1] [2021-10-28 09:18:15,909 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 09:18:15,910 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 [2021-10-28 09:18:15,910 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 [2021-10-28 09:18:15,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:15,911 INFO L85 PathProgramCache]: Analyzing trace with hash -296360126, now seen corresponding path program 1 times [2021-10-28 09:18:15,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:15,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800846074] [2021-10-28 09:18:15,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:15,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:15,968 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-10-28 09:18:15,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:15,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800846074] [2021-10-28 09:18:15,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800846074] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:18:15,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:18:15,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 09:18:15,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245084191] [2021-10-28 09:18:15,969 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1514610322, now seen corresponding path program 1 times [2021-10-28 09:18:15,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:15,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391973281] [2021-10-28 09:18:15,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:15,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:15,975 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:15,978 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:16,032 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:16,032 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:16,032 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:16,032 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:16,033 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 09:18:16,033 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:16,033 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:16,033 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:16,033 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration20_Loop [2021-10-28 09:18:16,033 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:16,033 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:16,035 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,053 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,125 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:16,125 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 09:18:16,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:16,135 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:16,141 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 09:18:16,141 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:16,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Waiting until timeout for monitored process [2021-10-28 09:18:16,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:16,215 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:16,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:16,216 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:16,220 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 09:18:16,220 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 09:18:16,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Waiting until timeout for monitored process [2021-10-28 09:18:16,379 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 09:18:16,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Ended with exit code 0 [2021-10-28 09:18:16,382 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 09:18:16,382 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 09:18:16,382 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 09:18:16,382 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 09:18:16,382 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 09:18:16,383 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:16,383 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 09:18:16,383 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 09:18:16,383 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration20_Loop [2021-10-28 09:18:16,383 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 09:18:16,383 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 09:18:16,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,394 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,397 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,400 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 09:18:16,472 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 09:18:16,472 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 09:18:16,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:16,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:16,475 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:16,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Waiting until timeout for monitored process [2021-10-28 09:18:16,477 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 [2021-10-28 09:18:16,485 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 09:18:16,485 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 09:18:16,486 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 09:18:16,486 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 09:18:16,486 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 09:18:16,488 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 09:18:16,488 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 09:18:16,491 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 09:18:16,494 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 09:18:16,494 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 09:18:16,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 09:18:16,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:16,496 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 09:18:16,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Waiting until timeout for monitored process [2021-10-28 09:18:16,497 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 09:18:16,497 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 09:18:16,497 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 09:18:16,497 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0) = 1*ULTIMATE.start_main_~range~0 Supporting invariants [] [2021-10-28 09:18:16,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Ended with exit code 0 [2021-10-28 09:18:16,522 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 09:18:16,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:16,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 09:18:16,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:16,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:16,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:16,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:18:16,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:16,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:16,988 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 [2021-10-28 09:18:16,988 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) [2021-10-28 09:18:17,023 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. [2021-10-28 09:18:17,024 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 [2021-10-28 09:18:17,024 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) [2021-10-28 09:18:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2021-10-28 09:18:17,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 105 letters. Loop has 6 letters. [2021-10-28 09:18:17,025 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:17,025 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 111 letters. Loop has 6 letters. [2021-10-28 09:18:17,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:17,026 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 105 letters. Loop has 12 letters. [2021-10-28 09:18:17,026 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 09:18:17,027 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 508 states and 535 transitions. [2021-10-28 09:18:17,032 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:18:17,035 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 508 states to 294 states and 310 transitions. [2021-10-28 09:18:17,035 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-10-28 09:18:17,036 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-10-28 09:18:17,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 294 states and 310 transitions. [2021-10-28 09:18:17,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:17,036 INFO L681 BuchiCegarLoop]: Abstraction has 294 states and 310 transitions. [2021-10-28 09:18:17,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states and 310 transitions. [2021-10-28 09:18:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 283. [2021-10-28 09:18:17,042 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) [2021-10-28 09:18:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 297 transitions. [2021-10-28 09:18:17,044 INFO L704 BuchiCegarLoop]: Abstraction has 283 states and 297 transitions. [2021-10-28 09:18:17,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:17,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:18:17,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:18:17,045 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) [2021-10-28 09:18:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:17,101 INFO L93 Difference]: Finished difference Result 294 states and 307 transitions. [2021-10-28 09:18:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:18:17,101 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 294 states and 307 transitions. [2021-10-28 09:18:17,104 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:18:17,107 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 294 states to 292 states and 305 transitions. [2021-10-28 09:18:17,107 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-28 09:18:17,108 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 09:18:17,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 305 transitions. [2021-10-28 09:18:17,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:17,109 INFO L681 BuchiCegarLoop]: Abstraction has 292 states and 305 transitions. [2021-10-28 09:18:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 305 transitions. [2021-10-28 09:18:17,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2021-10-28 09:18:17,115 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) [2021-10-28 09:18:17,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 301 transitions. [2021-10-28 09:18:17,116 INFO L704 BuchiCegarLoop]: Abstraction has 288 states and 301 transitions. [2021-10-28 09:18:17,117 INFO L587 BuchiCegarLoop]: Abstraction has 288 states and 301 transitions. [2021-10-28 09:18:17,117 INFO L425 BuchiCegarLoop]: ======== Iteration 21============ [2021-10-28 09:18:17,117 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 288 states and 301 transitions. [2021-10-28 09:18:17,119 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:18:17,119 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:17,119 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:17,121 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [18, 17, 17, 17, 17, 17, 1, 1] [2021-10-28 09:18:17,121 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:17,121 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 [2021-10-28 09:18:17,122 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 [2021-10-28 09:18:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:17,122 INFO L85 PathProgramCache]: Analyzing trace with hash 782815236, now seen corresponding path program 10 times [2021-10-28 09:18:17,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:17,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582759576] [2021-10-28 09:18:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:17,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:18:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:17,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:18:17,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582759576] [2021-10-28 09:18:17,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582759576] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:17,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053981725] [2021-10-28 09:18:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 09:18:17,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:18:17,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:18:17,397 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:18:17,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-28 09:18:17,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 09:18:17,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:18:17,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 09:18:17,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:18:18,053 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:18:18,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053981725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:18:18,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:18:18,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-10-28 09:18:18,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355834288] [2021-10-28 09:18:18,055 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 09:18:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:18,055 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 12 times [2021-10-28 09:18:18,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:18,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194132377] [2021-10-28 09:18:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:18,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:18,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,064 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,068 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:18,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:18:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 09:18:18,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2021-10-28 09:18:18,134 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) [2021-10-28 09:18:18,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:18:18,368 INFO L93 Difference]: Finished difference Result 324 states and 337 transitions. [2021-10-28 09:18:18,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 09:18:18,369 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 324 states and 337 transitions. [2021-10-28 09:18:18,372 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:18:18,374 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 324 states to 320 states and 333 transitions. [2021-10-28 09:18:18,374 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-28 09:18:18,374 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 09:18:18,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 320 states and 333 transitions. [2021-10-28 09:18:18,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 09:18:18,375 INFO L681 BuchiCegarLoop]: Abstraction has 320 states and 333 transitions. [2021-10-28 09:18:18,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states and 333 transitions. [2021-10-28 09:18:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 312. [2021-10-28 09:18:18,381 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) [2021-10-28 09:18:18,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 325 transitions. [2021-10-28 09:18:18,383 INFO L704 BuchiCegarLoop]: Abstraction has 312 states and 325 transitions. [2021-10-28 09:18:18,383 INFO L587 BuchiCegarLoop]: Abstraction has 312 states and 325 transitions. [2021-10-28 09:18:18,383 INFO L425 BuchiCegarLoop]: ======== Iteration 22============ [2021-10-28 09:18:18,383 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 312 states and 325 transitions. [2021-10-28 09:18:18,386 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 09:18:18,386 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 09:18:18,386 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 09:18:18,388 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [20, 19, 19, 19, 19, 19, 1, 1] [2021-10-28 09:18:18,388 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:18:18,388 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 [2021-10-28 09:18:18,388 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 [2021-10-28 09:18:18,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash 623328486, now seen corresponding path program 11 times [2021-10-28 09:18:18,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:18,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968265779] [2021-10-28 09:18:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:18,390 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,413 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,459 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:18,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 13 times [2021-10-28 09:18:18,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:18,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256711135] [2021-10-28 09:18:18,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:18,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,466 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:18,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,469 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:18,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:18:18,470 INFO L85 PathProgramCache]: Analyzing trace with hash 737282760, now seen corresponding path program 2 times [2021-10-28 09:18:18,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:18:18,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646772495] [2021-10-28 09:18:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:18:18,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:18:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,493 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:18:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:18:18,522 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:18:19,896 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 09:18:19 BoogieIcfgContainer [2021-10-28 09:18:19,897 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 09:18:19,897 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:18:19,897 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:18:19,898 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:18:19,898 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:17:58" (3/4) ... [2021-10-28 09:18:19,900 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 09:18:19,968 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:18:19,968 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:18:19,970 INFO L168 Benchmark]: Toolchain (without parser) took 21881.55 ms. Allocated memory was 102.8 MB in the beginning and 192.9 MB in the end (delta: 90.2 MB). Free memory was 69.5 MB in the beginning and 85.0 MB in the end (delta: -15.5 MB). Peak memory consumption was 74.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:19,970 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:18:19,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.41 ms. Allocated memory is still 102.8 MB. Free memory was 69.3 MB in the beginning and 79.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:19,971 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.29 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 77.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:18:19,971 INFO L168 Benchmark]: Boogie Preprocessor took 20.02 ms. Allocated memory is still 102.8 MB. Free memory was 77.8 MB in the beginning and 76.8 MB in the end (delta: 967.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:19,972 INFO L168 Benchmark]: RCFGBuilder took 253.35 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 69.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:19,972 INFO L168 Benchmark]: BuchiAutomizer took 21228.16 ms. Allocated memory was 102.8 MB in the beginning and 192.9 MB in the end (delta: 90.2 MB). Free memory was 68.7 MB in the beginning and 89.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 125.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:19,973 INFO L168 Benchmark]: Witness Printer took 71.26 ms. Allocated memory is still 192.9 MB. Free memory was 89.2 MB in the beginning and 85.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:18:19,975 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 102.8 MB. Free memory is still 55.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.41 ms. Allocated memory is still 102.8 MB. Free memory was 69.3 MB in the beginning and 79.2 MB in the end (delta: -9.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.29 ms. Allocated memory is still 102.8 MB. Free memory was 79.2 MB in the beginning and 77.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.02 ms. Allocated memory is still 102.8 MB. Free memory was 77.8 MB in the beginning and 76.8 MB in the end (delta: 967.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 253.35 ms. Allocated memory is still 102.8 MB. Free memory was 76.8 MB in the beginning and 69.1 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 21228.16 ms. Allocated memory was 102.8 MB in the beginning and 192.9 MB in the end (delta: 90.2 MB). Free memory was 68.7 MB in the beginning and 89.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 125.6 MB. Max. memory is 16.1 GB. * Witness Printer took 71.26 ms. Allocated memory is still 192.9 MB. Free memory was 89.2 MB in the beginning and 85.0 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 21.1s and 22 iterations. TraceHistogramMax:20. Analysis of lassos took 16.5s. Construction of modules took 1.2s. Büchi inclusion checks took 2.6s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 21. Automata minimization 0.2s 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, 1.2s 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: 43ms 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@4b594b8a=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! [2021-10-28 09:18:20,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-10-28 09:18:20,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-10-28 09:18:20,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-10-28 09:18:20,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-10-28 09:18:20,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-28 09:18:21,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:21,247 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-10-28 09:18:21,450 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-10-28 09:18:21,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-10-28 09:18:21,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-10-28 09:18:22,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-10-28 09:18:22,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-10-28 09:18:22,452 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_36a32988-0907-435b-95d2-99937663cb96/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...