./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/loop-invgen/nested6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt --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 32bit --witnessprinter.graph.data.programhash b3a725921be8310e882457f7f33c9ff7dbee0bc2 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:42:52,650 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:42:52,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:42:52,685 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:42:52,686 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:42:52,687 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:42:52,689 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:42:52,691 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:42:52,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:42:52,694 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:42:52,695 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:42:52,697 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:42:52,697 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:42:52,698 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:42:52,700 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:42:52,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:42:52,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:42:52,704 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:42:52,706 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:42:52,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:42:52,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:42:52,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:42:52,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:42:52,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:42:52,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:42:52,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:42:52,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:42:52,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:42:52,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:42:52,721 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:42:52,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:42:52,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:42:52,724 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:42:52,724 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:42:52,726 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:42:52,726 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:42:52,727 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:42:52,727 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:42:52,728 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:42:52,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:42:52,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:42:52,731 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Termination-32bit-Automizer_Default.epf [2021-10-13 00:42:52,759 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:42:52,759 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:42:52,760 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:42:52,760 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:42:52,761 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:42:52,761 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:42:52,762 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:42:52,762 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-13 00:42:52,762 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-13 00:42:52,762 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-13 00:42:52,762 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-13 00:42:52,763 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-13 00:42:52,763 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-13 00:42:52,763 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:42:52,763 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:42:52,763 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 00:42:52,764 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:42:52,764 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:42:52,764 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:42:52,764 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-13 00:42:52,764 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-13 00:42:52,765 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-13 00:42:52,765 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:42:52,765 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:42:52,765 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-13 00:42:52,765 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:42:52,766 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-13 00:42:52,766 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:42:52,766 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:42:52,766 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:42:52,767 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:42:52,767 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:42:52,768 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-13 00:42:52,768 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_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2021-10-13 00:42:53,025 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:42:53,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:42:53,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:42:53,057 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:42:53,059 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:42:53,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loop-invgen/nested6.i [2021-10-13 00:42:53,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/data/9d5af558b/470459f5629f48fc9963cca0888b96d7/FLAGbd6f3b068 [2021-10-13 00:42:53,557 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:42:53,557 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/sv-benchmarks/c/loop-invgen/nested6.i [2021-10-13 00:42:53,563 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/data/9d5af558b/470459f5629f48fc9963cca0888b96d7/FLAGbd6f3b068 [2021-10-13 00:42:53,968 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/data/9d5af558b/470459f5629f48fc9963cca0888b96d7 [2021-10-13 00:42:53,971 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:42:53,972 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:42:53,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:42:53,985 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:42:53,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:42:53,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:42:53" (1/1) ... [2021-10-13 00:42:53,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cd22a0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:53, skipping insertion in model container [2021-10-13 00:42:53,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:42:53" (1/1) ... [2021-10-13 00:42:54,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:42:54,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:42:54,173 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-13 00:42:54,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:42:54,197 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:42:54,213 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/sv-benchmarks/c/loop-invgen/nested6.i[893,906] [2021-10-13 00:42:54,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:42:54,240 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:42:54,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54 WrapperNode [2021-10-13 00:42:54,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:42:54,242 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:42:54,242 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:42:54,242 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:42:54,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,281 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:42:54,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:42:54,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:42:54,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:42:54,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,311 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:42:54,313 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:42:54,313 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:42:54,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:42:54,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (1/1) ... [2021-10-13 00:42:54,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:54,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:54,349 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:54,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-13 00:42:54,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:42:54,400 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:42:54,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:42:54,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:42:54,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:42:54,614 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 00:42:54,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:42:54 BoogieIcfgContainer [2021-10-13 00:42:54,615 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:42:54,616 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-13 00:42:54,616 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-13 00:42:54,618 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-13 00:42:54,619 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:42:54,619 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.10 12:42:53" (1/3) ... [2021-10-13 00:42:54,623 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1033f380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:42:54, skipping insertion in model container [2021-10-13 00:42:54,624 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:42:54,624 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:42:54" (2/3) ... [2021-10-13 00:42:54,624 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@1033f380 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.10 12:42:54, skipping insertion in model container [2021-10-13 00:42:54,624 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-13 00:42:54,624 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:42:54" (3/3) ... [2021-10-13 00:42:54,626 INFO L389 chiAutomizerObserver]: Analyzing ICFG nested6.i [2021-10-13 00:42:54,680 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-13 00:42:54,681 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-13 00:42:54,681 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-13 00:42:54,681 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-13 00:42:54,681 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-13 00:42:54,681 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-13 00:42:54,681 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-13 00:42:54,681 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-13 00:42:54,696 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-10-13 00:42:54,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:42:54,714 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:54,715 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:54,721 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-13 00:42:54,721 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:42:54,721 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-13 00:42:54,721 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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) [2021-10-13 00:42:54,725 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 14 [2021-10-13 00:42:54,725 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:54,725 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:54,726 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-13 00:42:54,726 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:42:54,732 INFO L791 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 12#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 20#L28true assume !!(main_~n~0 < 1000000); 9#L29true assume main_~k~0 == main_~n~0; 10#L29-1true main_~i~0 := 0; 22#L33-3true [2021-10-13 00:42:54,733 INFO L793 eck$LassoCheckResult]: Loop: 22#L33-3true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 13#L34-2true assume !true; 11#L33-2true main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 22#L33-3true [2021-10-13 00:42:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 1 times [2021-10-13 00:42:54,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:54,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361017615] [2021-10-13 00:42:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:54,749 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:54,847 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:54,883 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:54,887 INFO L82 PathProgramCache]: Analyzing trace with hash 53495, now seen corresponding path program 1 times [2021-10-13 00:42:54,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:54,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039479344] [2021-10-13 00:42:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:54,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:54,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:54,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:54,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039479344] [2021-10-13 00:42:54,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039479344] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:42:54,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:42:54,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:42:54,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84218635] [2021-10-13 00:42:54,936 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:42:54,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:54,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:42:54,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:42:54,953 INFO L87 Difference]: Start difference. First operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 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 2 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-13 00:42:54,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:54,959 INFO L93 Difference]: Finished difference Result 23 states and 28 transitions. [2021-10-13 00:42:54,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:42:54,961 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 28 transitions. [2021-10-13 00:42:54,963 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-13 00:42:54,966 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 16 states and 19 transitions. [2021-10-13 00:42:54,967 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-10-13 00:42:54,968 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-10-13 00:42:54,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 19 transitions. [2021-10-13 00:42:54,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:42:54,969 INFO L681 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-13 00:42:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 19 transitions. [2021-10-13 00:42:55,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 00:42:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.1875) internal successors, (19), 15 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) [2021-10-13 00:42:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-10-13 00:42:55,016 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-13 00:42:55,016 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-10-13 00:42:55,016 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-13 00:42:55,016 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 19 transitions. [2021-10-13 00:42:55,017 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2021-10-13 00:42:55,017 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:55,018 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:55,018 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-10-13 00:42:55,019 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:42:55,019 INFO L791 eck$LassoCheckResult]: Stem: 54#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 55#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 62#L28 assume !!(main_~n~0 < 1000000); 58#L29 assume main_~k~0 == main_~n~0; 59#L29-1 main_~i~0 := 0; 60#L33-3 [2021-10-13 00:42:55,019 INFO L793 eck$LassoCheckResult]: Loop: 60#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 63#L34-2 assume !(main_~j~0 < main_~n~0); 61#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 60#L33-3 [2021-10-13 00:42:55,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:55,020 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 2 times [2021-10-13 00:42:55,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:55,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817437620] [2021-10-13 00:42:55,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:55,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:55,038 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:55,074 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:55,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:55,075 INFO L82 PathProgramCache]: Analyzing trace with hash 51883, now seen corresponding path program 1 times [2021-10-13 00:42:55,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:55,076 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079668738] [2021-10-13 00:42:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:55,076 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:55,083 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:55,091 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:55,092 INFO L82 PathProgramCache]: Analyzing trace with hash 177631332, now seen corresponding path program 1 times [2021-10-13 00:42:55,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:55,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516796806] [2021-10-13 00:42:55,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:55,093 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:55,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:55,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516796806] [2021-10-13 00:42:55,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516796806] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:42:55,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:42:55,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 00:42:55,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340057015] [2021-10-13 00:42:55,239 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:55,240 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:55,240 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:55,240 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:55,240 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:42:55,240 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,240 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:55,241 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:55,241 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2021-10-13 00:42:55,241 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:55,241 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:55,262 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:55,269 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:55,326 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:55,327 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:42:55,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:55,331 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:55,337 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:55,337 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:55,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-13 00:42:55,368 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:42:55,368 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:42:55,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:55,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:55,408 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:55,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-13 00:42:55,415 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:55,415 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:55,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:55,466 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:55,478 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:55,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-13 00:42:55,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:42:55,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:55,714 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:42:55,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-10-13 00:42:55,719 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:55,719 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:55,719 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:55,719 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:55,719 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:42:55,719 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,719 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:55,720 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:55,720 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2021-10-13 00:42:55,720 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:55,720 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:55,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:55,725 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:55,776 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:55,780 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:42:55,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:55,787 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:55,793 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 [2021-10-13 00:42:55,803 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:42:55,803 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:42:55,804 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:42:55,804 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:42:55,804 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:42:55,806 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:42:55,806 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:42:55,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-13 00:42:55,820 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:42:55,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:55,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:55,856 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:55,864 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 [2021-10-13 00:42:55,872 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:42:55,872 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:42:55,872 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:42:55,873 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:42:55,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:42:55,876 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:42:55,876 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:42:55,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-13 00:42:55,882 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:42:55,895 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-13 00:42:55,895 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:42:55,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:55,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:55,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:55,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-13 00:42:55,937 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:42:55,937 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:42:55,938 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:42:55,938 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-13 00:42:55,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:55,974 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:42:56,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:42:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:56,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:56,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:42:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:56,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:56,145 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:42:56,146 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-13 00:42:56,202 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 28 states and 36 transitions. Complement of second has 4 states. [2021-10-13 00:42:56,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-13 00:42:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-10-13 00:42:56,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2021-10-13 00:42:56,206 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 3 letters. [2021-10-13 00:42:56,207 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:56,208 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-13 00:42:56,208 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:56,208 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 6 letters. [2021-10-13 00:42:56,209 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:56,210 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 36 transitions. [2021-10-13 00:42:56,217 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-13 00:42:56,220 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 27 states and 34 transitions. [2021-10-13 00:42:56,220 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2021-10-13 00:42:56,221 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-10-13 00:42:56,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 34 transitions. [2021-10-13 00:42:56,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:56,222 INFO L681 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-13 00:42:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 34 transitions. [2021-10-13 00:42:56,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-10-13 00:42:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 25 states have internal predecessors, (33), 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) [2021-10-13 00:42:56,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2021-10-13 00:42:56,233 INFO L704 BuchiCegarLoop]: Abstraction has 26 states and 33 transitions. [2021-10-13 00:42:56,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:56,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:42:56,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:42:56,234 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-10-13 00:42:56,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:56,265 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-10-13 00:42:56,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:42:56,266 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2021-10-13 00:42:56,268 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2021-10-13 00:42:56,269 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 47 states and 59 transitions. [2021-10-13 00:42:56,269 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-10-13 00:42:56,269 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2021-10-13 00:42:56,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 59 transitions. [2021-10-13 00:42:56,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:56,269 INFO L681 BuchiCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-10-13 00:42:56,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 59 transitions. [2021-10-13 00:42:56,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2021-10-13 00:42:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 26 states have internal predecessors, (34), 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) [2021-10-13 00:42:56,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2021-10-13 00:42:56,274 INFO L704 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-13 00:42:56,274 INFO L587 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2021-10-13 00:42:56,274 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-13 00:42:56,275 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 34 transitions. [2021-10-13 00:42:56,275 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2021-10-13 00:42:56,276 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:56,276 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:56,276 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:42:56,276 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2021-10-13 00:42:56,276 INFO L791 eck$LassoCheckResult]: Stem: 217#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 218#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 228#L28 assume !!(main_~n~0 < 1000000); 223#L29 assume main_~k~0 == main_~n~0; 224#L29-1 main_~i~0 := 0; 225#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 229#L34-2 [2021-10-13 00:42:56,276 INFO L793 eck$LassoCheckResult]: Loop: 229#L34-2 assume !!(main_~j~0 < main_~n~0); 230#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 236#L36-2 assume !(main_~k~0 < main_~n~0); 233#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 229#L34-2 [2021-10-13 00:42:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,277 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 1 times [2021-10-13 00:42:56,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:56,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956213142] [2021-10-13 00:42:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:56,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,298 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:56,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,325 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:56,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1850251, now seen corresponding path program 1 times [2021-10-13 00:42:56,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:56,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165700083] [2021-10-13 00:42:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:56,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:56,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:56,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165700083] [2021-10-13 00:42:56,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165700083] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:42:56,361 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:42:56,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:42:56,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586452673] [2021-10-13 00:42:56,361 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-13 00:42:56,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:56,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:42:56,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:42:56,364 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. cyclomatic complexity: 9 Second operand has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-10-13 00:42:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:56,404 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-10-13 00:42:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:42:56,405 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 36 transitions. [2021-10-13 00:42:56,407 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:42:56,408 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 36 transitions. [2021-10-13 00:42:56,408 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2021-10-13 00:42:56,409 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2021-10-13 00:42:56,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 36 transitions. [2021-10-13 00:42:56,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:56,409 INFO L681 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-10-13 00:42:56,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 36 transitions. [2021-10-13 00:42:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:42:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 28 states have internal predecessors, (36), 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) [2021-10-13 00:42:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-10-13 00:42:56,418 INFO L704 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-10-13 00:42:56,419 INFO L587 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-10-13 00:42:56,419 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-13 00:42:56,419 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 36 transitions. [2021-10-13 00:42:56,423 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2021-10-13 00:42:56,423 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:56,423 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:56,425 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:42:56,425 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:42:56,425 INFO L791 eck$LassoCheckResult]: Stem: 282#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 283#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 293#L28 assume !!(main_~n~0 < 1000000); 288#L29 assume main_~k~0 == main_~n~0; 289#L29-1 main_~i~0 := 0; 290#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 294#L34-2 [2021-10-13 00:42:56,426 INFO L793 eck$LassoCheckResult]: Loop: 294#L34-2 assume !!(main_~j~0 < main_~n~0); 295#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 309#L18-3 assume !(0 == __VERIFIER_assert_~cond); 284#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 285#L18-6 assume !(0 == __VERIFIER_assert_~cond); 298#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 294#L34-2 [2021-10-13 00:42:56,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,428 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 2 times [2021-10-13 00:42:56,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:56,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263389590] [2021-10-13 00:42:56,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:56,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,500 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,524 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1800992291, now seen corresponding path program 1 times [2021-10-13 00:42:56,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:56,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189891402] [2021-10-13 00:42:56,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:56,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,550 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:56,553 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:56,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,568 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:56,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:56,570 INFO L82 PathProgramCache]: Analyzing trace with hash 25632912, now seen corresponding path program 1 times [2021-10-13 00:42:56,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:56,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776555614] [2021-10-13 00:42:56,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:56,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:56,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,587 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:56,622 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:56,727 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:56,727 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:56,727 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:56,727 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:56,728 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:42:56,728 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:56,728 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:56,728 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:56,728 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2021-10-13 00:42:56,728 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:56,728 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:56,730 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:56,732 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:56,740 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:56,742 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:56,806 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:56,806 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:42:56,806 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:56,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:56,807 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:56,816 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:56,816 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:56,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-13 00:42:56,836 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:42:56,836 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:42:56,872 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:56,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:56,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:56,873 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:56,874 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:56,874 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:56,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-13 00:42:56,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:56,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:56,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:56,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:56,914 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:42:56,914 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:56,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-13 00:42:57,217 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:42:57,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:57,220 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:57,220 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:57,221 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:57,221 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:57,221 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:42:57,221 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,221 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:57,221 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:57,221 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2021-10-13 00:42:57,221 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:57,221 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:57,223 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,243 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,246 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,298 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:57,298 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:42:57,298 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:57,300 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:57,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-13 00:42:57,311 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 [2021-10-13 00:42:57,320 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:42:57,320 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:42:57,320 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:42:57,321 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:42:57,321 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:42:57,321 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:42:57,321 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:42:57,335 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:42:57,371 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:57,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:57,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:57,380 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 [2021-10-13 00:42:57,389 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:42:57,389 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:42:57,389 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:42:57,389 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:42:57,389 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:42:57,391 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:42:57,391 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:42:57,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-13 00:42:57,403 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:42:57,407 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:42:57,407 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-13 00:42:57,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:57,409 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:57,423 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:42:57,423 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:42:57,423 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:42:57,423 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~j~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2021-10-13 00:42:57,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-13 00:42:57,461 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:57,462 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:42:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:57,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:42:57,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:57,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:42:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:57,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:57,596 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:42:57,598 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 00:42:57,637 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 72 states and 91 transitions. Complement of second has 7 states. [2021-10-13 00:42:57,640 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 [2021-10-13 00:42:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-13 00:42:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-10-13 00:42:57,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 6 letters. [2021-10-13 00:42:57,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:57,641 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 12 letters. Loop has 6 letters. [2021-10-13 00:42:57,641 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:57,642 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 12 letters. [2021-10-13 00:42:57,642 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:57,642 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 72 states and 91 transitions. [2021-10-13 00:42:57,646 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2021-10-13 00:42:57,647 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 72 states to 57 states and 72 transitions. [2021-10-13 00:42:57,649 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-13 00:42:57,649 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2021-10-13 00:42:57,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 72 transitions. [2021-10-13 00:42:57,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:57,649 INFO L681 BuchiCegarLoop]: Abstraction has 57 states and 72 transitions. [2021-10-13 00:42:57,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 72 transitions. [2021-10-13 00:42:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2021-10-13 00:42:57,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 43 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) [2021-10-13 00:42:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2021-10-13 00:42:57,654 INFO L704 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-13 00:42:57,655 INFO L587 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2021-10-13 00:42:57,655 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-13 00:42:57,655 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2021-10-13 00:42:57,656 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2021-10-13 00:42:57,656 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:57,656 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:57,656 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:57,656 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:42:57,658 INFO L791 eck$LassoCheckResult]: Stem: 443#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 444#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 454#L28 assume !!(main_~n~0 < 1000000); 449#L29 assume main_~k~0 == main_~n~0; 450#L29-1 main_~i~0 := 0; 451#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 459#L34-2 assume !!(main_~j~0 < main_~n~0); 461#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 464#L36-2 [2021-10-13 00:42:57,659 INFO L793 eck$LassoCheckResult]: Loop: 464#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 465#L18 assume !(0 == __VERIFIER_assert_~cond); 468#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 464#L36-2 [2021-10-13 00:42:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash 177631345, now seen corresponding path program 1 times [2021-10-13 00:42:57,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:57,660 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773256994] [2021-10-13 00:42:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:57,660 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:57,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:57,687 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:57,700 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:57,701 INFO L82 PathProgramCache]: Analyzing trace with hash 70732, now seen corresponding path program 1 times [2021-10-13 00:42:57,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:57,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097609479] [2021-10-13 00:42:57,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:57,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:57,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:57,707 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:57,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:57,711 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:57,712 INFO L82 PathProgramCache]: Analyzing trace with hash 415731164, now seen corresponding path program 1 times [2021-10-13 00:42:57,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:57,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7072496] [2021-10-13 00:42:57,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:57,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:57,721 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:57,731 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:57,777 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:57,777 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:57,777 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:57,777 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:57,777 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:42:57,777 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,777 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:57,777 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:57,777 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2021-10-13 00:42:57,778 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:57,778 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:57,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:57,858 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:57,858 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:42:57,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:57,864 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:57,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:57,876 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:57,876 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:57,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-13 00:42:57,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:57,920 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:57,921 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:57,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:42:57,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:57,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-13 00:42:58,090 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:42:58,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:58,093 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:58,093 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:58,093 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:58,093 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:58,093 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:42:58,093 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,093 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:58,093 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:58,093 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2021-10-13 00:42:58,093 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:58,093 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:58,094 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,111 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,115 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,157 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:58,157 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:42:58,158 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:58,159 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:58,168 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 [2021-10-13 00:42:58,177 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:42:58,177 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:42:58,177 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:42:58,177 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:42:58,177 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:42:58,178 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:42:58,178 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:42:58,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-13 00:42:58,199 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:42:58,205 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-13 00:42:58,206 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:42:58,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:58,207 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:58,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-13 00:42:58,219 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:42:58,223 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:42:58,223 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:42:58,224 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~k~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2021-10-13 00:42:58,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:58,261 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:42:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:58,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:42:58,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:58,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:42:58,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:58,347 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:42:58,347 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-13 00:42:58,378 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 133 states and 168 transitions. Complement of second has 7 states. [2021-10-13 00:42:58,378 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 [2021-10-13 00:42:58,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2021-10-13 00:42:58,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-10-13 00:42:58,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 3 letters. [2021-10-13 00:42:58,379 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:58,379 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 11 letters. Loop has 3 letters. [2021-10-13 00:42:58,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:58,380 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 6 letters. [2021-10-13 00:42:58,380 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:58,380 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 168 transitions. [2021-10-13 00:42:58,382 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2021-10-13 00:42:58,384 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 98 states and 122 transitions. [2021-10-13 00:42:58,384 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2021-10-13 00:42:58,384 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2021-10-13 00:42:58,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 122 transitions. [2021-10-13 00:42:58,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:58,384 INFO L681 BuchiCegarLoop]: Abstraction has 98 states and 122 transitions. [2021-10-13 00:42:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 122 transitions. [2021-10-13 00:42:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2021-10-13 00:42:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 68 states have (on average 1.2352941176470589) internal successors, (84), 67 states have internal predecessors, (84), 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) [2021-10-13 00:42:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2021-10-13 00:42:58,397 INFO L704 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-10-13 00:42:58,397 INFO L587 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2021-10-13 00:42:58,397 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-13 00:42:58,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 84 transitions. [2021-10-13 00:42:58,398 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 19 [2021-10-13 00:42:58,398 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:58,398 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:58,399 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:58,399 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-10-13 00:42:58,399 INFO L791 eck$LassoCheckResult]: Stem: 677#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 678#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 688#L28 assume !!(main_~n~0 < 1000000); 683#L29 assume main_~k~0 == main_~n~0; 684#L29-1 main_~i~0 := 0; 685#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 689#L34-2 assume !!(main_~j~0 < main_~n~0); 690#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 731#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 740#L18 assume !(0 == __VERIFIER_assert_~cond); 741#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 739#L36-2 assume !(main_~k~0 < main_~n~0); 707#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 721#L34-2 assume !!(main_~j~0 < main_~n~0); 717#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 705#L36-2 [2021-10-13 00:42:58,399 INFO L793 eck$LassoCheckResult]: Loop: 705#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 744#L18 assume !(0 == __VERIFIER_assert_~cond); 704#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 705#L36-2 [2021-10-13 00:42:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:58,400 INFO L82 PathProgramCache]: Analyzing trace with hash 745022182, now seen corresponding path program 1 times [2021-10-13 00:42:58,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:58,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682422858] [2021-10-13 00:42:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:58,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:58,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:58,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:58,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682422858] [2021-10-13 00:42:58,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682422858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:58,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223592999] [2021-10-13 00:42:58,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:58,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:58,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:58,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:58,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:42:58,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:58,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:42:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:58,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:58,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223592999] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:58,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:58,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-13 00:42:58,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549945182] [2021-10-13 00:42:58,581 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:42:58,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:58,582 INFO L82 PathProgramCache]: Analyzing trace with hash 70732, now seen corresponding path program 2 times [2021-10-13 00:42:58,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:58,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887992215] [2021-10-13 00:42:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:58,582 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:58,600 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:58,607 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:58,655 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:58,656 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:58,656 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:58,656 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:58,656 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:42:58,656 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,656 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:58,656 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:58,657 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2021-10-13 00:42:58,657 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:58,657 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:58,658 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,664 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,668 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,699 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:58,699 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:42:58,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:58,707 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:58,713 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:58,713 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:58,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-13 00:42:58,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:58,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:58,774 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:58,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-13 00:42:58,780 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:42:58,781 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:58,944 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:42:58,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:58,946 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:58,947 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:58,947 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:58,947 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:58,947 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:42:58,947 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:58,947 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:58,947 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:58,947 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2021-10-13 00:42:58,947 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:58,947 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:58,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:58,975 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:59,012 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:59,012 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:42:59,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:59,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:59,013 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:59,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-13 00:42:59,014 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 [2021-10-13 00:42:59,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:42:59,022 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:42:59,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:42:59,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:42:59,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:42:59,023 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:42:59,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:42:59,025 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:42:59,028 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-13 00:42:59,028 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:42:59,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:59,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:59,029 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:59,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-13 00:42:59,030 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:42:59,030 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:42:59,030 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:42:59,031 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~k~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~k~0 Supporting invariants [] [2021-10-13 00:42:59,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:59,050 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:42:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-10-13 00:42:59,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:59,215 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:42:59,216 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-10-13 00:42:59,242 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Result 126 states and 158 transitions. Complement of second has 7 states. [2021-10-13 00:42:59,243 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 [2021-10-13 00:42:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-10-13 00:42:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-10-13 00:42:59,243 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2021-10-13 00:42:59,244 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:59,244 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:42:59,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:59,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:42:59,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:59,345 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:42:59,345 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-10-13 00:42:59,376 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Result 126 states and 158 transitions. Complement of second has 7 states. [2021-10-13 00:42:59,377 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 [2021-10-13 00:42:59,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-10-13 00:42:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2021-10-13 00:42:59,378 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2021-10-13 00:42:59,378 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:59,378 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:42:59,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:59,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:59,482 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:42:59,482 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-10-13 00:42:59,519 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Result 102 states and 129 transitions. Complement of second has 6 states. [2021-10-13 00:42:59,520 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 [2021-10-13 00:42:59,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-10-13 00:42:59,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2021-10-13 00:42:59,521 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 3 letters. [2021-10-13 00:42:59,521 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:59,522 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 18 letters. Loop has 3 letters. [2021-10-13 00:42:59,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:59,522 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2021-10-13 00:42:59,522 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:42:59,523 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 102 states and 129 transitions. [2021-10-13 00:42:59,524 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 17 [2021-10-13 00:42:59,525 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 102 states to 48 states and 59 transitions. [2021-10-13 00:42:59,525 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 20 [2021-10-13 00:42:59,525 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-13 00:42:59,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 59 transitions. [2021-10-13 00:42:59,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:59,526 INFO L681 BuchiCegarLoop]: Abstraction has 48 states and 59 transitions. [2021-10-13 00:42:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 59 transitions. [2021-10-13 00:42:59,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 29. [2021-10-13 00:42:59,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 states have internal predecessors, (35), 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) [2021-10-13 00:42:59,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2021-10-13 00:42:59,528 INFO L704 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2021-10-13 00:42:59,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:42:59,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:42:59,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:42:59,529 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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) [2021-10-13 00:42:59,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:42:59,571 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-10-13 00:42:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:42:59,571 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 45 states and 53 transitions. [2021-10-13 00:42:59,572 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 15 [2021-10-13 00:42:59,573 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 45 states to 43 states and 51 transitions. [2021-10-13 00:42:59,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-13 00:42:59,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-13 00:42:59,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 51 transitions. [2021-10-13 00:42:59,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-13 00:42:59,574 INFO L681 BuchiCegarLoop]: Abstraction has 43 states and 51 transitions. [2021-10-13 00:42:59,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states and 51 transitions. [2021-10-13 00:42:59,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-10-13 00:42:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 36 states have internal predecessors, (44), 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) [2021-10-13 00:42:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-10-13 00:42:59,576 INFO L704 BuchiCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-10-13 00:42:59,577 INFO L587 BuchiCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-10-13 00:42:59,577 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-13 00:42:59,577 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 37 states and 44 transitions. [2021-10-13 00:42:59,577 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 13 [2021-10-13 00:42:59,577 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-13 00:42:59,578 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-13 00:42:59,578 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:42:59,578 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-13 00:42:59,578 INFO L791 eck$LassoCheckResult]: Stem: 1424#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 1425#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1435#L28 assume !!(main_~n~0 < 1000000); 1430#L29 assume main_~k~0 == main_~n~0; 1431#L29-1 main_~i~0 := 0; 1432#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 1449#L34-2 assume !!(main_~j~0 < main_~n~0); 1450#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1448#L18-3 assume !(0 == __VERIFIER_assert_~cond); 1428#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1429#L18-6 assume !(0 == __VERIFIER_assert_~cond); 1438#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 1439#L34-2 assume !(main_~j~0 < main_~n~0); 1433#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 1434#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 1437#L34-2 [2021-10-13 00:42:59,579 INFO L793 eck$LassoCheckResult]: Loop: 1437#L34-2 assume !!(main_~j~0 < main_~n~0); 1440#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1447#L18-3 assume !(0 == __VERIFIER_assert_~cond); 1426#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1427#L18-6 assume !(0 == __VERIFIER_assert_~cond); 1436#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 1437#L34-2 [2021-10-13 00:42:59,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:59,579 INFO L82 PathProgramCache]: Analyzing trace with hash -874067824, now seen corresponding path program 1 times [2021-10-13 00:42:59,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:59,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121206128] [2021-10-13 00:42:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:59,580 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:59,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:59,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:42:59,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121206128] [2021-10-13 00:42:59,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121206128] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:59,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37573760] [2021-10-13 00:42:59,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:59,636 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:42:59,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:59,637 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:42:59,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:42:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:42:59,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:42:59,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:42:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:42:59,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37573760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:42:59,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:42:59,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-10-13 00:42:59,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859723597] [2021-10-13 00:42:59,837 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-13 00:42:59,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:42:59,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1800992291, now seen corresponding path program 2 times [2021-10-13 00:42:59,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:42:59,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619034014] [2021-10-13 00:42:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:42:59,838 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:42:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:59,843 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 00:42:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 00:42:59,848 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 00:42:59,912 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:42:59,912 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:42:59,912 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:42:59,912 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:42:59,913 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-13 00:42:59,913 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:59,913 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:42:59,913 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:42:59,913 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2021-10-13 00:42:59,913 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:42:59,913 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:42:59,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:59,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:59,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:59,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:42:59,967 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:42:59,967 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-13 00:42:59,967 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:42:59,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:42:59,968 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:42:59,972 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:42:59,972 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:42:59,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-13 00:43:00,000 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:43:00,000 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Honda state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:43:00,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-10-13 00:43:00,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,020 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-13 00:43:00,022 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:43:00,022 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:43:00,030 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:43:00,030 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:43:00,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-10-13 00:43:00,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,050 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-13 00:43:00,051 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:43:00,051 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:43:00,059 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-13 00:43:00,059 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet7=0} Honda state: {ULTIMATE.start_main_#t~nondet7=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-13 00:43:00,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:00,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,096 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,112 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-13 00:43:00,112 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:43:00,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-13 00:43:00,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:00,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,169 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-13 00:43:00,172 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-13 00:43:00,172 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-13 00:43:00,453 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-13 00:43:00,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-10-13 00:43:00,456 INFO L210 LassoAnalysis]: Preferences: [2021-10-13 00:43:00,456 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-13 00:43:00,456 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-13 00:43:00,456 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-13 00:43:00,456 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-13 00:43:00,456 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,456 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-13 00:43:00,456 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-13 00:43:00,456 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2021-10-13 00:43:00,457 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-13 00:43:00,457 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-13 00:43:00,457 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:43:00,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:43:00,462 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:43:00,465 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-13 00:43:00,521 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-13 00:43:00,521 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-13 00:43:00,521 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,522 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,544 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 [2021-10-13 00:43:00,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-13 00:43:00,553 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:43:00,553 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:43:00,553 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:43:00,553 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:43:00,553 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:43:00,554 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:43:00,554 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:43:00,567 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:43:00,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:00,588 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,589 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,601 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 [2021-10-13 00:43:00,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-13 00:43:00,609 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:43:00,609 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:43:00,609 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:43:00,609 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:43:00,609 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:43:00,611 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:43:00,611 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:43:00,612 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:43:00,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:00,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,631 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-13 00:43:00,632 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 [2021-10-13 00:43:00,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:43:00,639 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:43:00,639 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:43:00,639 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:43:00,639 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:43:00,642 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:43:00,642 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:43:00,675 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-13 00:43:00,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:00,694 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,695 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,696 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 [2021-10-13 00:43:00,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-13 00:43:00,704 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-13 00:43:00,704 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-13 00:43:00,704 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-13 00:43:00,704 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-13 00:43:00,704 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-13 00:43:00,705 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-13 00:43:00,705 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-13 00:43:00,707 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-13 00:43:00,711 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-13 00:43:00,711 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-13 00:43:00,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-13 00:43:00,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:43:00,712 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-13 00:43:00,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-13 00:43:00,713 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-13 00:43:00,713 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-13 00:43:00,713 INFO L513 LassoAnalysis]: Proved termination. [2021-10-13 00:43:00,713 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2021-10-13 00:43:00,735 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Ended with exit code 0 [2021-10-13 00:43:00,735 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-13 00:43:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:00,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:43:00,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:00,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:43:00,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:43:00,850 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:43:00,850 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-13 00:43:00,876 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Result 69 states and 85 transitions. Complement of second has 7 states. [2021-10-13 00:43:00,877 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 [2021-10-13 00:43:00,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-13 00:43:00,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-10-13 00:43:00,877 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2021-10-13 00:43:00,877 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:43:00,878 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:43:00,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:00,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:43:00,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:00,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:00,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:43:00,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:43:00,989 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:43:00,989 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-13 00:43:01,013 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Result 69 states and 85 transitions. Complement of second has 7 states. [2021-10-13 00:43:01,013 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 [2021-10-13 00:43:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-13 00:43:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2021-10-13 00:43:01,014 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2021-10-13 00:43:01,014 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:43:01,014 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-13 00:43:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:43:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:01,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 00:43:01,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:01,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:43:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:43:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:43:01,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:43:01,123 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-13 00:43:01,124 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9 Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-13 00:43:01,147 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 37 states and 44 transitions. cyclomatic complexity: 9. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) Result 65 states and 79 transitions. Complement of second has 6 states. [2021-10-13 00:43:01,148 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 [2021-10-13 00:43:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 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) [2021-10-13 00:43:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2021-10-13 00:43:01,148 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2021-10-13 00:43:01,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:43:01,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 21 letters. Loop has 6 letters. [2021-10-13 00:43:01,149 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:43:01,149 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 12 letters. [2021-10-13 00:43:01,150 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-13 00:43:01,150 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 65 states and 79 transitions. [2021-10-13 00:43:01,151 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:43:01,151 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 65 states to 0 states and 0 transitions. [2021-10-13 00:43:01,151 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 00:43:01,151 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 00:43:01,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 00:43:01,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:43:01,151 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:43:01,151 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:43:01,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:43:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:43:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:43:01,152 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 12 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 12 states have internal predecessors, (26), 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) [2021-10-13 00:43:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:43:01,152 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:43:01,153 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:43:01,153 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-13 00:43:01,153 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-13 00:43:01,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-13 00:43:01,153 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:43:01,153 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-13 00:43:01,154 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:43:01,154 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-13 00:43:01,154 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-13 00:43:01,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.10 12:43:01 BoogieIcfgContainer [2021-10-13 00:43:01,160 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-13 00:43:01,161 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:43:01,161 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:43:01,161 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:43:01,161 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:42:54" (3/4) ... [2021-10-13 00:43:01,164 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 00:43:01,164 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:43:01,166 INFO L168 Benchmark]: Toolchain (without parser) took 7192.73 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 54.9 MB in the beginning and 68.4 MB in the end (delta: -13.6 MB). Peak memory consumption was 42.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:01,166 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:43:01,166 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.76 ms. Allocated memory is still 90.2 MB. Free memory was 54.7 MB in the beginning and 65.9 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:01,167 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.62 ms. Allocated memory is still 90.2 MB. Free memory was 65.9 MB in the beginning and 64.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:01,167 INFO L168 Benchmark]: Boogie Preprocessor took 30.42 ms. Allocated memory is still 90.2 MB. Free memory was 64.5 MB in the beginning and 63.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:43:01,168 INFO L168 Benchmark]: RCFGBuilder took 301.81 ms. Allocated memory is still 90.2 MB. Free memory was 63.3 MB in the beginning and 53.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:01,168 INFO L168 Benchmark]: BuchiAutomizer took 6544.22 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 53.7 MB in the beginning and 69.5 MB in the end (delta: -15.8 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. [2021-10-13 00:43:01,168 INFO L168 Benchmark]: Witness Printer took 3.74 ms. Allocated memory is still 146.8 MB. Free memory was 69.5 MB in the beginning and 68.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:43:01,170 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 90.2 MB. Free memory was 62.4 MB in the beginning and 62.4 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.76 ms. Allocated memory is still 90.2 MB. Free memory was 54.7 MB in the beginning and 65.9 MB in the end (delta: -11.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.62 ms. Allocated memory is still 90.2 MB. Free memory was 65.9 MB in the beginning and 64.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.42 ms. Allocated memory is still 90.2 MB. Free memory was 64.5 MB in the beginning and 63.3 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 301.81 ms. Allocated memory is still 90.2 MB. Free memory was 63.3 MB in the beginning and 53.7 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6544.22 ms. Allocated memory was 90.2 MB in the beginning and 146.8 MB in the end (delta: 56.6 MB). Free memory was 53.7 MB in the beginning and 69.5 MB in the end (delta: -15.8 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.74 ms. Allocated memory is still 146.8 MB. Free memory was 69.5 MB in the beginning and 68.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 3 locations. One deterministic module has affine ranking function n + -1 * j and consists of 4 locations. One deterministic module has affine ranking function n + -1 * k and consists of 4 locations. One nondeterministic module has affine ranking function n + -1 * k and consists of 4 locations. One nondeterministic module has affine ranking function n + -1 * j and consists of 4 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.4s and 8 iterations. TraceHistogramMax:2. Analysis of lassos took 4.7s. Construction of modules took 0.2s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 81.1ms AutomataMinimizationTime, 8 MinimizatonAttempts, 89 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 68 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 223 SDtfs, 266 SDslu, 91 SDs, 0 SdLazy, 250 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 205.8ms Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf100 lsp74 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq144 hnf94 smp100 dnf100 smp100 tf109 neg100 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 39ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-13 00:43:01,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:01,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-13 00:43:01,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:43:01,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d25edc71-dbb6-485c-a8c2-c791815d3ef4/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...