./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 17:11:01,160 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 17:11:01,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 17:11:01,184 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 17:11:01,185 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 17:11:01,186 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 17:11:01,187 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 17:11:01,189 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 17:11:01,190 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 17:11:01,191 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 17:11:01,192 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 17:11:01,193 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 17:11:01,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 17:11:01,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 17:11:01,195 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 17:11:01,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 17:11:01,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 17:11:01,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 17:11:01,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 17:11:01,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 17:11:01,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 17:11:01,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 17:11:01,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 17:11:01,206 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 17:11:01,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 17:11:01,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 17:11:01,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 17:11:01,211 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 17:11:01,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 17:11:01,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 17:11:01,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 17:11:01,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 17:11:01,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 17:11:01,214 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 17:11:01,215 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 17:11:01,215 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 17:11:01,216 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 17:11:01,216 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 17:11:01,216 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 17:11:01,217 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 17:11:01,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 17:11:01,218 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-06 17:11:01,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 17:11:01,237 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 17:11:01,237 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 17:11:01,237 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 17:11:01,238 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 17:11:01,239 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 17:11:01,239 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 17:11:01,239 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-06 17:11:01,239 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-06 17:11:01,239 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-06 17:11:01,239 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-06 17:11:01,239 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-06 17:11:01,240 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-06 17:11:01,240 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 17:11:01,240 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 17:11:01,240 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 17:11:01,240 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 17:11:01,240 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-06 17:11:01,240 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-06 17:11:01,241 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-06 17:11:01,241 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 17:11:01,241 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-06 17:11:01,241 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 17:11:01,241 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-06 17:11:01,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 17:11:01,241 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 17:11:01,242 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 17:11:01,242 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 17:11:01,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 17:11:01,243 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-06 17:11:01,243 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_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac [2021-12-06 17:11:01,443 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 17:11:01,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 17:11:01,460 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 17:11:01,461 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 17:11:01,462 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 17:11:01,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-12-06 17:11:01,509 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/data/203c16ed4/2fc3e4ac2f9d43d3897159802b519c70/FLAG115c54712 [2021-12-06 17:11:01,934 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 17:11:01,934 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-12-06 17:11:01,938 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/data/203c16ed4/2fc3e4ac2f9d43d3897159802b519c70/FLAG115c54712 [2021-12-06 17:11:01,949 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/data/203c16ed4/2fc3e4ac2f9d43d3897159802b519c70 [2021-12-06 17:11:01,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 17:11:01,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 17:11:01,954 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 17:11:01,954 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 17:11:01,957 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 17:11:01,957 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:11:01" (1/1) ... [2021-12-06 17:11:01,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73b74c2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:01, skipping insertion in model container [2021-12-06 17:11:01,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 05:11:01" (1/1) ... [2021-12-06 17:11:01,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 17:11:01,973 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 17:11:02,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:11:02,082 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 17:11:02,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 17:11:02,102 INFO L208 MainTranslator]: Completed translation [2021-12-06 17:11:02,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02 WrapperNode [2021-12-06 17:11:02,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 17:11:02,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 17:11:02,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 17:11:02,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 17:11:02,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,112 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,124 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2021-12-06 17:11:02,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 17:11:02,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 17:11:02,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 17:11:02,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 17:11:02,131 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 17:11:02,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 17:11:02,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 17:11:02,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 17:11:02,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (1/1) ... [2021-12-06 17:11:02,144 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:02,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:02,163 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:02,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-06 17:11:02,209 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 17:11:02,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 17:11:02,258 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 17:11:02,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 17:11:02,312 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 17:11:02,318 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 17:11:02,318 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-06 17:11:02,320 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:11:02 BoogieIcfgContainer [2021-12-06 17:11:02,320 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 17:11:02,320 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-06 17:11:02,321 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-06 17:11:02,324 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-06 17:11:02,324 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 17:11:02,325 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 06.12 05:11:01" (1/3) ... [2021-12-06 17:11:02,325 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@c048034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.12 05:11:02, skipping insertion in model container [2021-12-06 17:11:02,326 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 17:11:02,326 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 05:11:02" (2/3) ... [2021-12-06 17:11:02,326 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@c048034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 06.12 05:11:02, skipping insertion in model container [2021-12-06 17:11:02,326 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-06 17:11:02,326 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:11:02" (3/3) ... [2021-12-06 17:11:02,327 INFO L388 chiAutomizerObserver]: Analyzing ICFG Narrowing.c [2021-12-06 17:11:02,365 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-06 17:11:02,365 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-06 17:11:02,365 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-06 17:11:02,365 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-06 17:11:02,365 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-06 17:11:02,365 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-06 17:11:02,366 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-06 17:11:02,366 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-06 17:11:02,377 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2021-12-06 17:11:02,401 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-06 17:11:02,401 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:02,401 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:02,409 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-06 17:11:02,409 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:02,409 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-06 17:11:02,410 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 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) [2021-12-06 17:11:02,411 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-06 17:11:02,411 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:02,411 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:02,411 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-06 17:11:02,411 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:02,417 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 9#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 5#L26-1true [2021-12-06 17:11:02,417 INFO L793 eck$LassoCheckResult]: Loop: 5#L26-1true assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 12#L14true assume !(0 == main_~i~0#1); 13#L14-2true assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 10#L17-1true assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 7#L20-1true assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 11#L23-1true assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 5#L26-1true [2021-12-06 17:11:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 1 times [2021-12-06 17:11:02,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454973037] [2021-12-06 17:11:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,487 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,500 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:02,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1217822514, now seen corresponding path program 1 times [2021-12-06 17:11:02,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533326274] [2021-12-06 17:11:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:02,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:02,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:02,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533326274] [2021-12-06 17:11:02,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533326274] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:02,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:02,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:11:02,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545626997] [2021-12-06 17:11:02,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:02,561 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-06 17:11:02,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:02,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:11:02,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:02,589 INFO L87 Difference]: Start difference. First operand has 12 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:02,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:02,611 INFO L93 Difference]: Finished difference Result 22 states and 31 transitions. [2021-12-06 17:11:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:02,616 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 22 states and 31 transitions. [2021-12-06 17:11:02,617 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-12-06 17:11:02,620 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 22 states to 14 states and 23 transitions. [2021-12-06 17:11:02,620 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2021-12-06 17:11:02,621 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2021-12-06 17:11:02,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 23 transitions. [2021-12-06 17:11:02,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:11:02,622 INFO L681 BuchiCegarLoop]: Abstraction has 14 states and 23 transitions. [2021-12-06 17:11:02,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states and 23 transitions. [2021-12-06 17:11:02,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-12-06 17:11:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 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) [2021-12-06 17:11:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 23 transitions. [2021-12-06 17:11:02,642 INFO L704 BuchiCegarLoop]: Abstraction has 14 states and 23 transitions. [2021-12-06 17:11:02,642 INFO L587 BuchiCegarLoop]: Abstraction has 14 states and 23 transitions. [2021-12-06 17:11:02,642 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-06 17:11:02,643 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 23 transitions. [2021-12-06 17:11:02,643 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-12-06 17:11:02,643 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:02,643 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:02,644 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-06 17:11:02,644 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:02,644 INFO L791 eck$LassoCheckResult]: Stem: 43#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 44#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 50#L26-1 [2021-12-06 17:11:02,644 INFO L793 eck$LassoCheckResult]: Loop: 50#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 56#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 53#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 51#L17-1 assume !(1 == main_~up~0#1); 52#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 48#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 50#L26-1 [2021-12-06 17:11:02,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,645 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 2 times [2021-12-06 17:11:02,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130307264] [2021-12-06 17:11:02,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,649 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:02,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,652 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:02,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1215977394, now seen corresponding path program 1 times [2021-12-06 17:11:02,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345653416] [2021-12-06 17:11:02,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,653 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:02,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:02,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345653416] [2021-12-06 17:11:02,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345653416] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:02,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:02,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:11:02,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571894093] [2021-12-06 17:11:02,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:02,684 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-06 17:11:02,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:11:02,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:11:02,685 INFO L87 Difference]: Start difference. First operand 14 states and 23 transitions. cyclomatic complexity: 10 Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:02,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:02,727 INFO L93 Difference]: Finished difference Result 38 states and 61 transitions. [2021-12-06 17:11:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:11:02,728 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 38 states and 61 transitions. [2021-12-06 17:11:02,730 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2021-12-06 17:11:02,732 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 38 states to 38 states and 61 transitions. [2021-12-06 17:11:02,732 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2021-12-06 17:11:02,733 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2021-12-06 17:11:02,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 61 transitions. [2021-12-06 17:11:02,733 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:11:02,733 INFO L681 BuchiCegarLoop]: Abstraction has 38 states and 61 transitions. [2021-12-06 17:11:02,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 61 transitions. [2021-12-06 17:11:02,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-06 17:11:02,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 37 states have internal predecessors, (61), 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) [2021-12-06 17:11:02,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 61 transitions. [2021-12-06 17:11:02,738 INFO L704 BuchiCegarLoop]: Abstraction has 38 states and 61 transitions. [2021-12-06 17:11:02,738 INFO L587 BuchiCegarLoop]: Abstraction has 38 states and 61 transitions. [2021-12-06 17:11:02,738 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-06 17:11:02,738 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 38 states and 61 transitions. [2021-12-06 17:11:02,739 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2021-12-06 17:11:02,739 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:02,739 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:02,739 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-06 17:11:02,740 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:02,740 INFO L791 eck$LassoCheckResult]: Stem: 102#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 103#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 109#L26-1 [2021-12-06 17:11:02,740 INFO L793 eck$LassoCheckResult]: Loop: 109#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 126#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 123#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 120#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 121#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 118#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 109#L26-1 [2021-12-06 17:11:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 3 times [2021-12-06 17:11:02,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249057071] [2021-12-06 17:11:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,744 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,747 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:02,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1216035056, now seen corresponding path program 1 times [2021-12-06 17:11:02,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249436329] [2021-12-06 17:11:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:02,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:02,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249436329] [2021-12-06 17:11:02,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249436329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:02,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:02,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:11:02,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267325930] [2021-12-06 17:11:02,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:02,768 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-06 17:11:02,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:02,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:11:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:02,769 INFO L87 Difference]: Start difference. First operand 38 states and 61 transitions. cyclomatic complexity: 24 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:02,782 INFO L93 Difference]: Finished difference Result 38 states and 58 transitions. [2021-12-06 17:11:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:02,784 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 38 states and 58 transitions. [2021-12-06 17:11:02,785 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 36 [2021-12-06 17:11:02,787 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 38 states to 38 states and 58 transitions. [2021-12-06 17:11:02,787 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 38 [2021-12-06 17:11:02,787 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 38 [2021-12-06 17:11:02,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 58 transitions. [2021-12-06 17:11:02,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-12-06 17:11:02,788 INFO L681 BuchiCegarLoop]: Abstraction has 38 states and 58 transitions. [2021-12-06 17:11:02,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states and 58 transitions. [2021-12-06 17:11:02,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2021-12-06 17:11:02,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 32 states have (on average 1.53125) internal successors, (49), 31 states have internal predecessors, (49), 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) [2021-12-06 17:11:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 49 transitions. [2021-12-06 17:11:02,793 INFO L704 BuchiCegarLoop]: Abstraction has 32 states and 49 transitions. [2021-12-06 17:11:02,793 INFO L587 BuchiCegarLoop]: Abstraction has 32 states and 49 transitions. [2021-12-06 17:11:02,793 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-06 17:11:02,793 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 32 states and 49 transitions. [2021-12-06 17:11:02,794 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 30 [2021-12-06 17:11:02,794 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:02,794 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:02,795 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-12-06 17:11:02,795 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:02,795 INFO L791 eck$LassoCheckResult]: Stem: 184#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 185#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 190#L26-1 [2021-12-06 17:11:02,795 INFO L793 eck$LassoCheckResult]: Loop: 190#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 201#L14 assume !(0 == main_~i~0#1); 207#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 205#L17-1 assume !(1 == main_~up~0#1); 204#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 202#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 190#L26-1 [2021-12-06 17:11:02,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 963, now seen corresponding path program 4 times [2021-12-06 17:11:02,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442217841] [2021-12-06 17:11:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:02,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,804 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1217884020, now seen corresponding path program 1 times [2021-12-06 17:11:02,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733637269] [2021-12-06 17:11:02,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,813 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,819 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:02,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:02,820 INFO L85 PathProgramCache]: Analyzing trace with hash 297933238, now seen corresponding path program 1 times [2021-12-06 17:11:02,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:02,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336326772] [2021-12-06 17:11:02,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:02,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,828 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:02,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:02,835 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:02,899 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:02,899 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:02,899 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:02,899 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:02,900 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 17:11:02,900 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:02,900 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:02,900 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:02,900 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-12-06 17:11:02,900 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:02,900 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:02,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:02,919 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:02,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:02,931 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:02,990 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:02,991 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 17:11:02,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:02,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:02,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:02,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-06 17:11:02,997 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:02,997 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:03,015 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:03,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:03,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-06 17:11:03,038 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:03,039 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,052 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:03,052 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:03,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2021-12-06 17:11:03,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-06 17:11:03,074 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:03,074 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-12-06 17:11:03,101 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,102 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-06 17:11:03,103 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 17:11:03,103 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,146 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 17:11:03,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-06 17:11:03,149 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:03,149 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:03,149 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:03,149 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:03,149 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 17:11:03,149 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,149 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:03,149 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:03,149 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-12-06 17:11:03,149 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:03,149 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:03,151 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,153 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,163 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,214 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:03,218 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 17:11:03,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,219 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-06 17:11:03,221 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 [2021-12-06 17:11:03,231 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:03,232 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:03,232 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:03,232 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:03,236 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-06 17:11:03,237 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-06 17:11:03,241 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 17:11:03,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-12-06 17:11:03,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,262 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-06 17:11:03,263 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 [2021-12-06 17:11:03,271 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:03,271 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 17:11:03,271 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:03,271 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:03,271 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:03,273 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 17:11:03,273 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 17:11:03,275 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 17:11:03,279 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-06 17:11:03,279 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 17:11:03,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,281 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-06 17:11:03,282 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 17:11:03,282 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 17:11:03,282 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 17:11:03,283 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2021-12-06 17:11:03,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-12-06 17:11:03,303 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 17:11:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:03,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:11:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:03,400 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 17:11:03,401 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 32 states and 49 transitions. cyclomatic complexity: 18 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) [2021-12-06 17:11:03,448 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 32 states and 49 transitions. cyclomatic complexity: 18. 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) Result 100 states and 152 transitions. Complement of second has 7 states. [2021-12-06 17:11:03,449 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 [2021-12-06 17:11:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-12-06 17:11:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 16 transitions. [2021-12-06 17:11:03,451 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 2 letters. Loop has 6 letters. [2021-12-06 17:11:03,452 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:03,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 8 letters. Loop has 6 letters. [2021-12-06 17:11:03,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:03,453 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 16 transitions. Stem has 2 letters. Loop has 12 letters. [2021-12-06 17:11:03,453 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:03,454 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 152 transitions. [2021-12-06 17:11:03,457 INFO L131 ngComponentsAnalysis]: Automaton has 5 accepting balls. 60 [2021-12-06 17:11:03,466 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 100 states and 152 transitions. [2021-12-06 17:11:03,468 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 63 [2021-12-06 17:11:03,469 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 66 [2021-12-06 17:11:03,469 INFO L73 IsDeterministic]: Start isDeterministic. Operand 100 states and 152 transitions. [2021-12-06 17:11:03,469 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:03,469 INFO L681 BuchiCegarLoop]: Abstraction has 100 states and 152 transitions. [2021-12-06 17:11:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states and 152 transitions. [2021-12-06 17:11:03,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 89. [2021-12-06 17:11:03,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 89 states have (on average 1.550561797752809) internal successors, (138), 88 states have internal predecessors, (138), 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) [2021-12-06 17:11:03,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 138 transitions. [2021-12-06 17:11:03,478 INFO L704 BuchiCegarLoop]: Abstraction has 89 states and 138 transitions. [2021-12-06 17:11:03,478 INFO L587 BuchiCegarLoop]: Abstraction has 89 states and 138 transitions. [2021-12-06 17:11:03,478 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-12-06 17:11:03,478 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 89 states and 138 transitions. [2021-12-06 17:11:03,480 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 54 [2021-12-06 17:11:03,480 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:03,480 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:03,480 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-06 17:11:03,481 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:03,481 INFO L791 eck$LassoCheckResult]: Stem: 364#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 365#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 379#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 387#L14 [2021-12-06 17:11:03,481 INFO L793 eck$LassoCheckResult]: Loop: 387#L14 assume !(0 == main_~i~0#1); 438#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 434#L17-1 assume !(1 == main_~up~0#1); 431#L20-1 assume !(0 == main_~up~0#1); 427#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 426#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 387#L14 [2021-12-06 17:11:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash 29864, now seen corresponding path program 1 times [2021-12-06 17:11:03,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776089539] [2021-12-06 17:11:03,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2021-12-06 17:11:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,487 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,489 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1366755632, now seen corresponding path program 1 times [2021-12-06 17:11:03,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322743937] [2021-12-06 17:11:03,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,495 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,499 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,500 INFO L85 PathProgramCache]: Analyzing trace with hash 645997719, now seen corresponding path program 1 times [2021-12-06 17:11:03,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237800439] [2021-12-06 17:11:03,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:03,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:03,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:03,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237800439] [2021-12-06 17:11:03,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237800439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:03,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:03,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:11:03,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253466873] [2021-12-06 17:11:03,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:03,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:03,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:11:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:03,554 INFO L87 Difference]: Start difference. First operand 89 states and 138 transitions. cyclomatic complexity: 54 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:03,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:03,564 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2021-12-06 17:11:03,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:03,565 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 112 transitions. [2021-12-06 17:11:03,567 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 38 [2021-12-06 17:11:03,568 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 71 states and 102 transitions. [2021-12-06 17:11:03,569 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-12-06 17:11:03,569 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-12-06 17:11:03,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 102 transitions. [2021-12-06 17:11:03,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:03,569 INFO L681 BuchiCegarLoop]: Abstraction has 71 states and 102 transitions. [2021-12-06 17:11:03,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states and 102 transitions. [2021-12-06 17:11:03,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2021-12-06 17:11:03,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:03,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 94 transitions. [2021-12-06 17:11:03,576 INFO L704 BuchiCegarLoop]: Abstraction has 65 states and 94 transitions. [2021-12-06 17:11:03,576 INFO L587 BuchiCegarLoop]: Abstraction has 65 states and 94 transitions. [2021-12-06 17:11:03,576 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-12-06 17:11:03,576 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 65 states and 94 transitions. [2021-12-06 17:11:03,578 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 35 [2021-12-06 17:11:03,578 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:03,578 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:03,578 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-06 17:11:03,578 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:03,578 INFO L791 eck$LassoCheckResult]: Stem: 538#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 539#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 553#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 571#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 585#L14-2 [2021-12-06 17:11:03,578 INFO L793 eck$LassoCheckResult]: Loop: 585#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 596#L17-1 assume !(1 == main_~up~0#1); 594#L20-1 assume !(0 == main_~up~0#1); 591#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 540#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 541#L14 assume !(0 == main_~i~0#1); 585#L14-2 [2021-12-06 17:11:03,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,579 INFO L85 PathProgramCache]: Analyzing trace with hash 925798, now seen corresponding path program 1 times [2021-12-06 17:11:03,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356682984] [2021-12-06 17:11:03,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,584 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,587 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1544255282, now seen corresponding path program 2 times [2021-12-06 17:11:03,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676290663] [2021-12-06 17:11:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,589 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,593 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,597 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1071052759, now seen corresponding path program 1 times [2021-12-06 17:11:03,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73565535] [2021-12-06 17:11:03,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:03,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:03,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:03,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73565535] [2021-12-06 17:11:03,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73565535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:03,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:03,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 17:11:03,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334633506] [2021-12-06 17:11:03,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:03,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 17:11:03,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 17:11:03,640 INFO L87 Difference]: Start difference. First operand 65 states and 94 transitions. cyclomatic complexity: 33 Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:03,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:03,647 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-12-06 17:11:03,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 17:11:03,648 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 49 states and 66 transitions. [2021-12-06 17:11:03,649 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-12-06 17:11:03,650 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 49 states to 47 states and 64 transitions. [2021-12-06 17:11:03,650 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 34 [2021-12-06 17:11:03,650 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 34 [2021-12-06 17:11:03,650 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 64 transitions. [2021-12-06 17:11:03,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:03,650 INFO L681 BuchiCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-12-06 17:11:03,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 64 transitions. [2021-12-06 17:11:03,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2021-12-06 17:11:03,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 42 states have (on average 1.380952380952381) internal successors, (58), 41 states have internal predecessors, (58), 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) [2021-12-06 17:11:03,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 58 transitions. [2021-12-06 17:11:03,654 INFO L704 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2021-12-06 17:11:03,654 INFO L587 BuchiCegarLoop]: Abstraction has 42 states and 58 transitions. [2021-12-06 17:11:03,654 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-12-06 17:11:03,654 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 42 states and 58 transitions. [2021-12-06 17:11:03,655 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-12-06 17:11:03,655 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:03,655 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:03,655 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-12-06 17:11:03,655 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:03,655 INFO L791 eck$LassoCheckResult]: Stem: 660#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 661#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 677#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 678#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 679#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 686#L17-1 [2021-12-06 17:11:03,655 INFO L793 eck$LassoCheckResult]: Loop: 686#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 666#L20-1 assume !(0 == main_~up~0#1); 667#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 692#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 690#L14 assume !(0 == main_~i~0#1); 688#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 686#L17-1 [2021-12-06 17:11:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash 28699760, now seen corresponding path program 1 times [2021-12-06 17:11:03,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146645001] [2021-12-06 17:11:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,659 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,663 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1664464050, now seen corresponding path program 1 times [2021-12-06 17:11:03,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911032594] [2021-12-06 17:11:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,668 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,672 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:03,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1214361119, now seen corresponding path program 1 times [2021-12-06 17:11:03,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:03,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682188460] [2021-12-06 17:11:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:03,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,677 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:03,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:03,680 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:03,714 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:03,715 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:03,715 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:03,715 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:03,715 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 17:11:03,715 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,715 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:03,715 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:03,715 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-12-06 17:11:03,715 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:03,715 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:03,716 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,718 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,720 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,721 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:03,786 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:03,786 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 17:11:03,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,787 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-06 17:11:03,788 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:03,788 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,801 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:03,802 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:03,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:03,821 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-12-06 17:11:03,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:03,823 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:03,836 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:03,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2021-12-06 17:11:03,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,856 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-06 17:11:03,857 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:03,857 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,866 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:03,866 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0#1=1} Honda state: {ULTIMATE.start_main_~up~0#1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:03,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-12-06 17:11:03,885 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,885 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-06 17:11:03,893 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:03,893 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:03,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:03,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:03,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:03,921 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:03,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-06 17:11:03,922 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 17:11:03,922 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:04,185 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 17:11:04,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-12-06 17:11:04,188 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:04,188 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:04,188 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:04,188 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:04,188 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 17:11:04,188 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,188 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:04,188 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:04,189 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-12-06 17:11:04,189 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:04,189 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:04,190 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,191 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,193 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,194 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,251 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:04,251 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 17:11:04,251 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,252 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-06 17:11:04,253 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 [2021-12-06 17:11:04,260 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:04,261 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:04,261 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:04,261 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:04,262 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-06 17:11:04,262 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-06 17:11:04,265 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 17:11:04,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2021-12-06 17:11:04,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,284 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-06 17:11:04,286 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-06 17:11:04,293 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:04,293 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:04,293 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:04,293 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:04,295 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-06 17:11:04,295 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-06 17:11:04,297 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 17:11:04,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2021-12-06 17:11:04,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,317 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-06 17:11:04,318 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 [2021-12-06 17:11:04,325 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:04,325 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 17:11:04,325 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:04,325 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:04,325 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:04,326 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 17:11:04,326 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 17:11:04,327 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 17:11:04,346 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Ended with exit code 0 [2021-12-06 17:11:04,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,347 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-06 17:11:04,349 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 [2021-12-06 17:11:04,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:04,356 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 17:11:04,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:04,356 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-12-06 17:11:04,356 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:04,357 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-12-06 17:11:04,357 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 17:11:04,360 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 17:11:04,363 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-06 17:11:04,363 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 17:11:04,364 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,364 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-06 17:11:04,365 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 17:11:04,366 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 17:11:04,366 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 17:11:04,366 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0#1, ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~range~0#1 - 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2021-12-06 17:11:04,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:04,384 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 17:11:04,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:04,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:04,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:04,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:04,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:11:04,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:04,426 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 17:11:04,426 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-06 17:11:04,453 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 42 states and 58 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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 91 states and 124 transitions. Complement of second has 7 states. [2021-12-06 17:11:04,453 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 [2021-12-06 17:11:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-06 17:11:04,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2021-12-06 17:11:04,454 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 5 letters. Loop has 6 letters. [2021-12-06 17:11:04,454 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:04,454 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 11 letters. Loop has 6 letters. [2021-12-06 17:11:04,454 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:04,454 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 5 letters. Loop has 12 letters. [2021-12-06 17:11:04,455 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:04,455 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 91 states and 124 transitions. [2021-12-06 17:11:04,456 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-12-06 17:11:04,457 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 91 states to 78 states and 107 transitions. [2021-12-06 17:11:04,457 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2021-12-06 17:11:04,457 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 45 [2021-12-06 17:11:04,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 78 states and 107 transitions. [2021-12-06 17:11:04,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:04,457 INFO L681 BuchiCegarLoop]: Abstraction has 78 states and 107 transitions. [2021-12-06 17:11:04,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states and 107 transitions. [2021-12-06 17:11:04,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-12-06 17:11:04,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 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) [2021-12-06 17:11:04,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2021-12-06 17:11:04,461 INFO L704 BuchiCegarLoop]: Abstraction has 72 states and 101 transitions. [2021-12-06 17:11:04,461 INFO L587 BuchiCegarLoop]: Abstraction has 72 states and 101 transitions. [2021-12-06 17:11:04,461 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-12-06 17:11:04,461 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 72 states and 101 transitions. [2021-12-06 17:11:04,461 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-12-06 17:11:04,461 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:04,462 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:04,462 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:04,462 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:04,462 INFO L791 eck$LassoCheckResult]: Stem: 851#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 852#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 867#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 912#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 917#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 863#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 864#L20-1 assume !(0 == main_~up~0#1); 913#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 910#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 868#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 869#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 879#L17-1 [2021-12-06 17:11:04,462 INFO L793 eck$LassoCheckResult]: Loop: 879#L17-1 assume !(1 == main_~up~0#1); 875#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 876#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 892#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 922#L14 assume !(0 == main_~i~0#1); 881#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 879#L17-1 [2021-12-06 17:11:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:04,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1214420765, now seen corresponding path program 1 times [2021-12-06 17:11:04,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:04,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609949866] [2021-12-06 17:11:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:04,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:04,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:04,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:04,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609949866] [2021-12-06 17:11:04,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609949866] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:04,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:04,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:11:04,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562769654] [2021-12-06 17:11:04,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:04,479 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:04,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1719875308, now seen corresponding path program 1 times [2021-12-06 17:11:04,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:04,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318080087] [2021-12-06 17:11:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:04,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:04,483 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:04,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:04,486 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:04,509 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:04,509 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:04,509 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:04,509 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:04,509 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 17:11:04,510 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,510 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:04,510 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:04,510 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-12-06 17:11:04,510 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:04,510 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:04,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,512 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,560 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:04,560 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 17:11:04,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:04,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-06 17:11:04,563 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:04,563 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:04,576 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:04,576 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:04,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2021-12-06 17:11:04,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,596 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-06 17:11:04,598 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:04,598 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:04,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-12-06 17:11:04,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,625 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-06 17:11:04,626 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 17:11:04,626 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:04,780 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 17:11:04,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Ended with exit code 0 [2021-12-06 17:11:04,784 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:04,784 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:04,784 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:04,784 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:04,784 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 17:11:04,784 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,784 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:04,784 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:04,784 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-12-06 17:11:04,784 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:04,784 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:04,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,792 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,794 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:04,830 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:04,831 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 17:11:04,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-06 17:11:04,832 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 [2021-12-06 17:11:04,840 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:04,840 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:04,840 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:04,840 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:04,842 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-06 17:11:04,842 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-12-06 17:11:04,845 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 17:11:04,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2021-12-06 17:11:04,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,864 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-06 17:11:04,865 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 [2021-12-06 17:11:04,872 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:04,872 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 17:11:04,872 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:04,873 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:04,873 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:04,874 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 17:11:04,874 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 17:11:04,876 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 17:11:04,878 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-06 17:11:04,878 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 17:11:04,879 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:04,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:04,879 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:04,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-06 17:11:04,884 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 17:11:04,884 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 17:11:04,884 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 17:11:04,884 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1) = 1*ULTIMATE.start_main_~i~0#1 Supporting invariants [] [2021-12-06 17:11:04,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:04,903 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 17:11:04,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:04,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:04,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:04,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:04,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:11:04,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:04,954 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 17:11:04,954 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34 Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-12-06 17:11:04,977 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 72 states and 101 transitions. cyclomatic complexity: 34. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 161 states and 226 transitions. Complement of second has 7 states. [2021-12-06 17:11:04,978 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 [2021-12-06 17:11:04,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2021-12-06 17:11:04,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2021-12-06 17:11:04,979 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 11 letters. Loop has 6 letters. [2021-12-06 17:11:04,979 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:04,979 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 17 letters. Loop has 6 letters. [2021-12-06 17:11:04,979 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:04,979 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 11 letters. Loop has 12 letters. [2021-12-06 17:11:04,980 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:04,980 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 161 states and 226 transitions. [2021-12-06 17:11:04,982 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 35 [2021-12-06 17:11:04,983 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 161 states to 127 states and 177 transitions. [2021-12-06 17:11:04,983 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 57 [2021-12-06 17:11:04,984 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 65 [2021-12-06 17:11:04,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 177 transitions. [2021-12-06 17:11:04,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:04,984 INFO L681 BuchiCegarLoop]: Abstraction has 127 states and 177 transitions. [2021-12-06 17:11:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 177 transitions. [2021-12-06 17:11:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2021-12-06 17:11:04,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 118 states have (on average 1.423728813559322) internal successors, (168), 117 states have internal predecessors, (168), 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) [2021-12-06 17:11:04,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 168 transitions. [2021-12-06 17:11:04,990 INFO L704 BuchiCegarLoop]: Abstraction has 118 states and 168 transitions. [2021-12-06 17:11:04,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:04,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:11:04,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:11:04,990 INFO L87 Difference]: Start difference. First operand 118 states and 168 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 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) [2021-12-06 17:11:05,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:05,007 INFO L93 Difference]: Finished difference Result 142 states and 184 transitions. [2021-12-06 17:11:05,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:11:05,007 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 142 states and 184 transitions. [2021-12-06 17:11:05,008 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 43 [2021-12-06 17:11:05,010 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 142 states to 142 states and 184 transitions. [2021-12-06 17:11:05,010 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2021-12-06 17:11:05,010 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2021-12-06 17:11:05,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 142 states and 184 transitions. [2021-12-06 17:11:05,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:05,010 INFO L681 BuchiCegarLoop]: Abstraction has 142 states and 184 transitions. [2021-12-06 17:11:05,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states and 184 transitions. [2021-12-06 17:11:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 118. [2021-12-06 17:11:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 118 states have (on average 1.3220338983050848) internal successors, (156), 117 states have internal predecessors, (156), 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) [2021-12-06 17:11:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 156 transitions. [2021-12-06 17:11:05,015 INFO L704 BuchiCegarLoop]: Abstraction has 118 states and 156 transitions. [2021-12-06 17:11:05,015 INFO L587 BuchiCegarLoop]: Abstraction has 118 states and 156 transitions. [2021-12-06 17:11:05,015 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-12-06 17:11:05,015 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 118 states and 156 transitions. [2021-12-06 17:11:05,016 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 35 [2021-12-06 17:11:05,016 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:05,016 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:05,017 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:05,017 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-12-06 17:11:05,017 INFO L791 eck$LassoCheckResult]: Stem: 1420#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 1421#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 1435#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1475#L14 assume !(0 == main_~i~0#1); 1506#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 1505#L17-1 assume !(1 == main_~up~0#1); 1504#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 1501#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 1502#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1510#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 1509#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 1495#L17-1 [2021-12-06 17:11:05,017 INFO L793 eck$LassoCheckResult]: Loop: 1495#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 1493#L20-1 assume !(0 == main_~up~0#1); 1491#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 1488#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 1466#L14 assume !(0 == main_~i~0#1); 1467#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 1495#L17-1 [2021-12-06 17:11:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1968356129, now seen corresponding path program 1 times [2021-12-06 17:11:05,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:05,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229848910] [2021-12-06 17:11:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:05,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:05,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,034 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:05,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229848910] [2021-12-06 17:11:05,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229848910] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:05,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519763658] [2021-12-06 17:11:05,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:05,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:05,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,036 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-06 17:11:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:11:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519763658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:11:05,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:11:05,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-12-06 17:11:05,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888235505] [2021-12-06 17:11:05,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:11:05,084 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:05,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:05,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1664464050, now seen corresponding path program 2 times [2021-12-06 17:11:05,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:05,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992891768] [2021-12-06 17:11:05,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:05,085 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:05,088 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:05,090 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:05,117 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:05,117 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:05,117 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:05,117 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:05,117 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-06 17:11:05,117 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,117 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:05,117 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:05,117 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration9_Loop [2021-12-06 17:11:05,117 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:05,118 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:05,118 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,125 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,126 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,178 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:05,178 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-06 17:11:05,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,192 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-06 17:11:05,194 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:05,194 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:05,204 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-12-06 17:11:05,204 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0#1=1} Honda state: {ULTIMATE.start_main_~up~0#1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-12-06 17:11:05,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-12-06 17:11:05,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,223 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-06 17:11:05,225 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-06 17:11:05,225 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:05,252 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-12-06 17:11:05,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,252 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-12-06 17:11:05,254 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-06 17:11:05,254 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-06 17:11:05,515 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-06 17:11:05,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:05,518 INFO L210 LassoAnalysis]: Preferences: [2021-12-06 17:11:05,518 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-06 17:11:05,518 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-06 17:11:05,518 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-06 17:11:05,518 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-06 17:11:05,518 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,518 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-06 17:11:05,518 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-06 17:11:05,518 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration9_Loop [2021-12-06 17:11:05,518 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-06 17:11:05,519 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-06 17:11:05,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,521 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,526 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-06 17:11:05,577 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-06 17:11:05,577 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-06 17:11:05,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,578 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-12-06 17:11:05,579 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 [2021-12-06 17:11:05,586 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:05,586 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 17:11:05,586 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:05,586 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-06 17:11:05,586 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:05,587 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-06 17:11:05,587 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 17:11:05,588 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-06 17:11:05,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:05,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,607 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-12-06 17:11:05,608 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 [2021-12-06 17:11:05,615 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-06 17:11:05,615 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-06 17:11:05,616 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-06 17:11:05,616 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-12-06 17:11:05,616 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-06 17:11:05,617 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-12-06 17:11:05,617 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-06 17:11:05,619 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-06 17:11:05,622 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-12-06 17:11:05,622 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-06 17:11:05,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-06 17:11:05,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,623 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-12-06 17:11:05,624 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-06 17:11:05,624 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-06 17:11:05,624 INFO L513 LassoAnalysis]: Proved termination. [2021-12-06 17:11:05,624 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0#1, ULTIMATE.start_main_~range~0#1) = -1*ULTIMATE.start_main_~i~0#1 + 1*ULTIMATE.start_main_~range~0#1 Supporting invariants [] [2021-12-06 17:11:05,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:05,643 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-06 17:11:05,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:05,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,689 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 17:11:05,690 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 118 states and 156 transitions. cyclomatic complexity: 48 Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:11:05,709 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 118 states and 156 transitions. cyclomatic complexity: 48. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 155 states and 198 transitions. Complement of second has 7 states. [2021-12-06 17:11:05,709 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 [2021-12-06 17:11:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:11:05,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 23 transitions. [2021-12-06 17:11:05,710 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 23 transitions. Stem has 11 letters. Loop has 6 letters. [2021-12-06 17:11:05,710 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:05,710 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-06 17:11:05,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:05,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,752 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 17:11:05,752 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 118 states and 156 transitions. cyclomatic complexity: 48 Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:11:05,782 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 118 states and 156 transitions. cyclomatic complexity: 48. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 204 states and 259 transitions. Complement of second has 9 states. [2021-12-06 17:11:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-12-06 17:11:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:11:05,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 30 transitions. [2021-12-06 17:11:05,784 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 30 transitions. Stem has 11 letters. Loop has 6 letters. [2021-12-06 17:11:05,784 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:05,784 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-06 17:11:05,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,822 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Ended with exit code 0 [2021-12-06 17:11:05,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,837 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-12-06 17:11:05,837 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 118 states and 156 transitions. cyclomatic complexity: 48 Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:11:05,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:05,858 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 118 states and 156 transitions. cyclomatic complexity: 48. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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 186 states and 243 transitions. Complement of second has 8 states. [2021-12-06 17:11:05,858 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 [2021-12-06 17:11:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 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) [2021-12-06 17:11:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 27 transitions. [2021-12-06 17:11:05,859 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 11 letters. Loop has 6 letters. [2021-12-06 17:11:05,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:05,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 17 letters. Loop has 6 letters. [2021-12-06 17:11:05,860 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:05,860 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 27 transitions. Stem has 11 letters. Loop has 12 letters. [2021-12-06 17:11:05,861 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-06 17:11:05,861 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 186 states and 243 transitions. [2021-12-06 17:11:05,863 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 35 [2021-12-06 17:11:05,865 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 186 states to 140 states and 182 transitions. [2021-12-06 17:11:05,865 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 44 [2021-12-06 17:11:05,865 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 54 [2021-12-06 17:11:05,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 140 states and 182 transitions. [2021-12-06 17:11:05,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:05,865 INFO L681 BuchiCegarLoop]: Abstraction has 140 states and 182 transitions. [2021-12-06 17:11:05,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states and 182 transitions. [2021-12-06 17:11:05,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2021-12-06 17:11:05,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 93 states have (on average 1.3440860215053763) internal successors, (125), 92 states have internal predecessors, (125), 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) [2021-12-06 17:11:05,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2021-12-06 17:11:05,870 INFO L704 BuchiCegarLoop]: Abstraction has 93 states and 125 transitions. [2021-12-06 17:11:05,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:11:05,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:11:05,870 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 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) [2021-12-06 17:11:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:05,919 INFO L93 Difference]: Finished difference Result 382 states and 489 transitions. [2021-12-06 17:11:05,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 17:11:05,919 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 382 states and 489 transitions. [2021-12-06 17:11:05,922 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 82 [2021-12-06 17:11:05,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 382 states to 366 states and 471 transitions. [2021-12-06 17:11:05,924 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 124 [2021-12-06 17:11:05,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 124 [2021-12-06 17:11:05,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 366 states and 471 transitions. [2021-12-06 17:11:05,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:05,925 INFO L681 BuchiCegarLoop]: Abstraction has 366 states and 471 transitions. [2021-12-06 17:11:05,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states and 471 transitions. [2021-12-06 17:11:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 302. [2021-12-06 17:11:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 302 states have (on average 1.2980132450331126) internal successors, (392), 301 states have internal predecessors, (392), 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) [2021-12-06 17:11:05,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 392 transitions. [2021-12-06 17:11:05,931 INFO L704 BuchiCegarLoop]: Abstraction has 302 states and 392 transitions. [2021-12-06 17:11:05,931 INFO L587 BuchiCegarLoop]: Abstraction has 302 states and 392 transitions. [2021-12-06 17:11:05,932 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-12-06 17:11:05,932 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 302 states and 392 transitions. [2021-12-06 17:11:05,933 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 79 [2021-12-06 17:11:05,933 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:05,933 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:05,934 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-06 17:11:05,934 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-12-06 17:11:05,934 INFO L791 eck$LassoCheckResult]: Stem: 2830#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2831#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 2846#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3015#L14 assume !(0 == main_~i~0#1); 3013#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 3014#L17-1 assume !(1 == main_~up~0#1); 3131#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2842#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2843#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3130#L14 assume !(0 == main_~i~0#1); 3128#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 3118#L17-1 assume !(1 == main_~up~0#1); 3068#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2893#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2895#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2883#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 2876#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2877#L17-1 [2021-12-06 17:11:05,934 INFO L793 eck$LassoCheckResult]: Loop: 2877#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 3058#L20-1 assume !(0 == main_~up~0#1); 3056#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2885#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2879#L14 assume !(0 == main_~i~0#1); 2854#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 2855#L17-1 assume !(1 == main_~up~0#1); 2836#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2837#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 3047#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 3046#L14 assume !(0 == main_~i~0#1); 2856#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2852#L17-1 assume !(1 == main_~up~0#1); 2853#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 2896#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 2890#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 2884#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 2878#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 2877#L17-1 [2021-12-06 17:11:05,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:05,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1579420680, now seen corresponding path program 1 times [2021-12-06 17:11:05,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:05,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698350175] [2021-12-06 17:11:05,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:05,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:05,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698350175] [2021-12-06 17:11:05,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698350175] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:05,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334111789] [2021-12-06 17:11:05,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:05,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:05,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:05,959 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:05,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-12-06 17:11:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:05,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 17:11:05,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:05,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:11:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:06,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334111789] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:11:06,031 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:11:06,031 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-12-06 17:11:06,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651179775] [2021-12-06 17:11:06,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:11:06,031 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:06,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1874596340, now seen corresponding path program 1 times [2021-12-06 17:11:06,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77707579] [2021-12-06 17:11:06,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:06,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:06,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77707579] [2021-12-06 17:11:06,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77707579] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:06,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391598415] [2021-12-06 17:11:06,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:06,105 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:06,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-12-06 17:11:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:11:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:06,186 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:06,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:11:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:06,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391598415] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:11:06,222 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:11:06,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 11 [2021-12-06 17:11:06,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241507632] [2021-12-06 17:11:06,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:11:06,223 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-12-06 17:11:06,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:06,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 17:11:06,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-06 17:11:06,223 INFO L87 Difference]: Start difference. First operand 302 states and 392 transitions. cyclomatic complexity: 108 Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 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) [2021-12-06 17:11:06,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:06,356 INFO L93 Difference]: Finished difference Result 940 states and 1180 transitions. [2021-12-06 17:11:06,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-06 17:11:06,356 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 940 states and 1180 transitions. [2021-12-06 17:11:06,361 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 270 [2021-12-06 17:11:06,367 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 940 states to 906 states and 1143 transitions. [2021-12-06 17:11:06,367 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 337 [2021-12-06 17:11:06,367 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 337 [2021-12-06 17:11:06,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 906 states and 1143 transitions. [2021-12-06 17:11:06,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:06,367 INFO L681 BuchiCegarLoop]: Abstraction has 906 states and 1143 transitions. [2021-12-06 17:11:06,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states and 1143 transitions. [2021-12-06 17:11:06,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 463. [2021-12-06 17:11:06,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 463 states have (on average 1.285097192224622) internal successors, (595), 462 states have internal predecessors, (595), 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) [2021-12-06 17:11:06,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 595 transitions. [2021-12-06 17:11:06,376 INFO L704 BuchiCegarLoop]: Abstraction has 463 states and 595 transitions. [2021-12-06 17:11:06,376 INFO L587 BuchiCegarLoop]: Abstraction has 463 states and 595 transitions. [2021-12-06 17:11:06,376 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-12-06 17:11:06,376 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 463 states and 595 transitions. [2021-12-06 17:11:06,378 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 129 [2021-12-06 17:11:06,378 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:06,378 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:06,379 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 3, 3, 3, 2, 1, 1, 1] [2021-12-06 17:11:06,379 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:06,380 INFO L791 eck$LassoCheckResult]: Stem: 4316#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 4317#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 4332#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4531#L14 assume !(0 == main_~i~0#1); 4529#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4528#L17-1 assume !(1 == main_~up~0#1); 4366#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4362#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4363#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4634#L14 assume !(0 == main_~i~0#1); 4631#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 4629#L17-1 assume !(1 == main_~up~0#1); 4627#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4625#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4623#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4622#L14 assume !(0 == main_~i~0#1); 4620#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 4373#L17-1 assume !(1 == main_~up~0#1); 4618#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4616#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4613#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4609#L14 assume !(0 == main_~i~0#1); 4607#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4602#L17-1 assume !(1 == main_~up~0#1); 4601#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4598#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 4525#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4594#L14 assume !(0 == main_~i~0#1); 4591#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 4471#L17-1 assume !(1 == main_~up~0#1); 4468#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4466#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4452#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4464#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 4462#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4414#L17-1 [2021-12-06 17:11:06,380 INFO L793 eck$LassoCheckResult]: Loop: 4414#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 4460#L20-1 assume !(0 == main_~up~0#1); 4459#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4430#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4423#L14 assume !(0 == main_~i~0#1); 4415#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 4382#L17-1 assume !(1 == main_~up~0#1); 4388#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 4387#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 4375#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 4444#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 4413#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 4414#L17-1 [2021-12-06 17:11:06,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1344654385, now seen corresponding path program 1 times [2021-12-06 17:11:06,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536501016] [2021-12-06 17:11:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-12-06 17:11:06,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:06,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536501016] [2021-12-06 17:11:06,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536501016] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:06,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:06,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 17:11:06,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058801814] [2021-12-06 17:11:06,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:06,400 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:06,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,400 INFO L85 PathProgramCache]: Analyzing trace with hash -654021601, now seen corresponding path program 2 times [2021-12-06 17:11:06,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488677103] [2021-12-06 17:11:06,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:06,404 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:06,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:06,407 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:06,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:06,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 17:11:06,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-06 17:11:06,438 INFO L87 Difference]: Start difference. First operand 463 states and 595 transitions. cyclomatic complexity: 150 Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 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) [2021-12-06 17:11:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:06,451 INFO L93 Difference]: Finished difference Result 453 states and 536 transitions. [2021-12-06 17:11:06,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 17:11:06,452 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 453 states and 536 transitions. [2021-12-06 17:11:06,454 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 129 [2021-12-06 17:11:06,456 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 453 states to 439 states and 516 transitions. [2021-12-06 17:11:06,457 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 139 [2021-12-06 17:11:06,457 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 139 [2021-12-06 17:11:06,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 439 states and 516 transitions. [2021-12-06 17:11:06,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:06,457 INFO L681 BuchiCegarLoop]: Abstraction has 439 states and 516 transitions. [2021-12-06 17:11:06,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states and 516 transitions. [2021-12-06 17:11:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 421. [2021-12-06 17:11:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 421 states have (on average 1.182897862232779) internal successors, (498), 420 states have internal predecessors, (498), 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) [2021-12-06 17:11:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 498 transitions. [2021-12-06 17:11:06,463 INFO L704 BuchiCegarLoop]: Abstraction has 421 states and 498 transitions. [2021-12-06 17:11:06,463 INFO L587 BuchiCegarLoop]: Abstraction has 421 states and 498 transitions. [2021-12-06 17:11:06,463 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-12-06 17:11:06,463 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 421 states and 498 transitions. [2021-12-06 17:11:06,465 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 128 [2021-12-06 17:11:06,465 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:06,465 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:06,466 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 6, 6, 5, 3, 3, 1, 1, 1, 1] [2021-12-06 17:11:06,466 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:06,466 INFO L791 eck$LassoCheckResult]: Stem: 5239#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 5240#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 5254#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5440#L14 assume !(0 == main_~i~0#1); 5441#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 5603#L17-1 assume !(1 == main_~up~0#1); 5602#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5253#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 5243#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5244#L14 assume !(0 == main_~i~0#1); 5256#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 5251#L17-1 assume !(1 == main_~up~0#1); 5247#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5248#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 5483#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5598#L14 assume !(0 == main_~i~0#1); 5597#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 5596#L17-1 assume !(1 == main_~up~0#1); 5595#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5594#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 5593#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5592#L14 assume !(0 == main_~i~0#1); 5591#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 5590#L17-1 assume !(1 == main_~up~0#1); 5589#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5588#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 5587#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5585#L14 assume !(0 == main_~i~0#1); 5583#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 5581#L17-1 assume !(1 == main_~up~0#1); 5579#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5575#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 5479#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5494#L14 assume !(0 == main_~i~0#1); 5491#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 5489#L17-1 assume !(1 == main_~up~0#1); 5487#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5478#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 5473#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5474#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 5271#L14-2 [2021-12-06 17:11:06,466 INFO L793 eck$LassoCheckResult]: Loop: 5271#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 5272#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 5652#L20-1 assume !(0 == main_~up~0#1); 5600#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 5573#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5558#L14 assume !(0 == main_~i~0#1); 5556#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 5554#L17-1 assume !(1 == main_~up~0#1); 5552#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 5481#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 5476#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 5659#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 5271#L14-2 [2021-12-06 17:11:06,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,467 INFO L85 PathProgramCache]: Analyzing trace with hash 816551444, now seen corresponding path program 2 times [2021-12-06 17:11:06,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931685662] [2021-12-06 17:11:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,467 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 92 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-06 17:11:06,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:06,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931685662] [2021-12-06 17:11:06,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931685662] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 17:11:06,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 17:11:06,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 17:11:06,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139228209] [2021-12-06 17:11:06,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 17:11:06,506 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:06,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 3 times [2021-12-06 17:11:06,507 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8596278] [2021-12-06 17:11:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:06,510 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:06,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:06,512 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:06,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 17:11:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 17:11:06,546 INFO L87 Difference]: Start difference. First operand 421 states and 498 transitions. cyclomatic complexity: 95 Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 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) [2021-12-06 17:11:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:06,574 INFO L93 Difference]: Finished difference Result 509 states and 569 transitions. [2021-12-06 17:11:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 17:11:06,574 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 509 states and 569 transitions. [2021-12-06 17:11:06,577 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 133 [2021-12-06 17:11:06,579 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 509 states to 503 states and 563 transitions. [2021-12-06 17:11:06,580 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 152 [2021-12-06 17:11:06,580 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 152 [2021-12-06 17:11:06,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 503 states and 563 transitions. [2021-12-06 17:11:06,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:06,580 INFO L681 BuchiCegarLoop]: Abstraction has 503 states and 563 transitions. [2021-12-06 17:11:06,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states and 563 transitions. [2021-12-06 17:11:06,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 501. [2021-12-06 17:11:06,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 501 states, 501 states have (on average 1.1197604790419162) internal successors, (561), 500 states have internal predecessors, (561), 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) [2021-12-06 17:11:06,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 501 states to 501 states and 561 transitions. [2021-12-06 17:11:06,587 INFO L704 BuchiCegarLoop]: Abstraction has 501 states and 561 transitions. [2021-12-06 17:11:06,587 INFO L587 BuchiCegarLoop]: Abstraction has 501 states and 561 transitions. [2021-12-06 17:11:06,587 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-12-06 17:11:06,587 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 501 states and 561 transitions. [2021-12-06 17:11:06,589 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 132 [2021-12-06 17:11:06,589 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:06,589 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:06,590 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [7, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1] [2021-12-06 17:11:06,590 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:06,590 INFO L791 eck$LassoCheckResult]: Stem: 6178#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 6179#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 6192#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6310#L14 assume !(0 == main_~i~0#1); 6307#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 6308#L17-1 assume !(1 == main_~up~0#1); 6529#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6526#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 6524#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6521#L14 assume !(0 == main_~i~0#1); 6519#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 6517#L17-1 assume !(1 == main_~up~0#1); 6515#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6512#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 6510#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6508#L14 assume !(0 == main_~i~0#1); 6506#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 6504#L17-1 assume !(1 == main_~up~0#1); 6502#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6499#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 6497#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6493#L14 assume !(0 == main_~i~0#1); 6491#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 6489#L17-1 assume !(1 == main_~up~0#1); 6487#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6481#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 6477#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6471#L14 assume !(0 == main_~i~0#1); 6467#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 6463#L17-1 assume !(1 == main_~up~0#1); 6459#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6454#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 6413#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6447#L14 assume !(0 == main_~i~0#1); 6444#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 6440#L17-1 assume !(1 == main_~up~0#1); 6436#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6411#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 6412#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6210#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 6209#L14-2 [2021-12-06 17:11:06,590 INFO L793 eck$LassoCheckResult]: Loop: 6209#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 6207#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 6208#L20-1 assume !(0 == main_~up~0#1); 6431#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 6427#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6424#L14 assume !(0 == main_~i~0#1); 6422#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 6420#L17-1 assume !(1 == main_~up~0#1); 6418#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 6416#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 6408#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 6409#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 6209#L14-2 [2021-12-06 17:11:06,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1673713296, now seen corresponding path program 3 times [2021-12-06 17:11:06,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464310996] [2021-12-06 17:11:06,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:06,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464310996] [2021-12-06 17:11:06,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464310996] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363088287] [2021-12-06 17:11:06,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 17:11:06,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:06,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:06,642 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:06,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-12-06 17:11:06,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-06 17:11:06,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:11:06,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-06 17:11:06,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:11:06,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:11:06,802 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 17:11:06,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363088287] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:11:06,803 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:11:06,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2021-12-06 17:11:06,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359116088] [2021-12-06 17:11:06,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:11:06,803 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:06,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:06,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 4 times [2021-12-06 17:11:06,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:06,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972045413] [2021-12-06 17:11:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:06,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:06,808 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:06,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:06,812 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:06,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:06,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 17:11:06,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-12-06 17:11:06,849 INFO L87 Difference]: Start difference. First operand 501 states and 561 transitions. cyclomatic complexity: 82 Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 18 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 17:11:07,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:07,206 INFO L93 Difference]: Finished difference Result 2479 states and 2633 transitions. [2021-12-06 17:11:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-12-06 17:11:07,207 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 2479 states and 2633 transitions. [2021-12-06 17:11:07,220 INFO L131 ngComponentsAnalysis]: Automaton has 8 accepting balls. 632 [2021-12-06 17:11:07,231 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 2479 states to 2337 states and 2481 transitions. [2021-12-06 17:11:07,231 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 815 [2021-12-06 17:11:07,232 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 815 [2021-12-06 17:11:07,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2337 states and 2481 transitions. [2021-12-06 17:11:07,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:07,232 INFO L681 BuchiCegarLoop]: Abstraction has 2337 states and 2481 transitions. [2021-12-06 17:11:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states and 2481 transitions. [2021-12-06 17:11:07,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 1841. [2021-12-06 17:11:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1841 states have (on average 1.0700706137968496) internal successors, (1970), 1840 states have internal predecessors, (1970), 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) [2021-12-06 17:11:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 1970 transitions. [2021-12-06 17:11:07,265 INFO L704 BuchiCegarLoop]: Abstraction has 1841 states and 1970 transitions. [2021-12-06 17:11:07,265 INFO L587 BuchiCegarLoop]: Abstraction has 1841 states and 1970 transitions. [2021-12-06 17:11:07,265 INFO L425 BuchiCegarLoop]: ======== Iteration 14============ [2021-12-06 17:11:07,265 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 1841 states and 1970 transitions. [2021-12-06 17:11:07,272 INFO L131 ngComponentsAnalysis]: Automaton has 6 accepting balls. 390 [2021-12-06 17:11:07,272 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:07,272 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:07,274 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2021-12-06 17:11:07,274 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:07,274 INFO L791 eck$LassoCheckResult]: Stem: 9487#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 9488#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 9501#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9640#L14 assume !(0 == main_~i~0#1); 9638#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 9639#L17-1 assume !(1 == main_~up~0#1); 9986#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9985#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 9984#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9983#L14 assume !(0 == main_~i~0#1); 9982#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9981#L17-1 assume !(1 == main_~up~0#1); 9980#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9978#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9977#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9976#L14 assume !(0 == main_~i~0#1); 9975#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9974#L17-1 assume !(1 == main_~up~0#1); 9973#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9971#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9970#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9969#L14 assume !(0 == main_~i~0#1); 9968#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9967#L17-1 assume !(1 == main_~up~0#1); 9966#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9964#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9963#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9962#L14 assume !(0 == main_~i~0#1); 9961#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9960#L17-1 assume !(1 == main_~up~0#1); 9959#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9957#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9956#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9955#L14 assume !(0 == main_~i~0#1); 9954#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9953#L17-1 assume !(1 == main_~up~0#1); 9952#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9950#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9949#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9948#L14 assume !(0 == main_~i~0#1); 9947#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9946#L17-1 assume !(1 == main_~up~0#1); 9945#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9943#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9942#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9941#L14 assume !(0 == main_~i~0#1); 9940#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9939#L17-1 assume !(1 == main_~up~0#1); 9938#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9936#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9935#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9934#L14 assume !(0 == main_~i~0#1); 9933#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9932#L17-1 assume !(1 == main_~up~0#1); 9931#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9929#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9928#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9927#L14 assume !(0 == main_~i~0#1); 9926#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9925#L17-1 assume !(1 == main_~up~0#1); 9924#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9922#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9921#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9920#L14 assume !(0 == main_~i~0#1); 9919#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9918#L17-1 assume !(1 == main_~up~0#1); 9917#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9915#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9914#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9913#L14 assume !(0 == main_~i~0#1); 9912#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9911#L17-1 assume !(1 == main_~up~0#1); 9910#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9909#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9665#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9712#L14 assume !(0 == main_~i~0#1); 9699#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9695#L17-1 assume !(1 == main_~up~0#1); 9670#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9663#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 9664#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9521#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 9518#L14-2 [2021-12-06 17:11:07,274 INFO L793 eck$LassoCheckResult]: Loop: 9518#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 9516#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 9517#L20-1 assume !(0 == main_~up~0#1); 9677#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 9676#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9674#L14 assume !(0 == main_~i~0#1); 9673#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 9672#L17-1 assume !(1 == main_~up~0#1); 9671#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 9668#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 9658#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 9659#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 9518#L14-2 [2021-12-06 17:11:07,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:07,275 INFO L85 PathProgramCache]: Analyzing trace with hash -214808025, now seen corresponding path program 4 times [2021-12-06 17:11:07,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:07,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474618922] [2021-12-06 17:11:07,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:07,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:07,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 17:11:07,411 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:07,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 17:11:07,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474618922] [2021-12-06 17:11:07,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474618922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 17:11:07,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384324331] [2021-12-06 17:11:07,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 17:11:07,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 17:11:07,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 17:11:07,413 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 17:11:07,413 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-12-06 17:11:07,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 17:11:07,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 17:11:07,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 17:11:07,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 17:11:07,551 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:07,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 17:11:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 17:11:07,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384324331] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 17:11:07,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 17:11:07,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2021-12-06 17:11:07,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713202648] [2021-12-06 17:11:07,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 17:11:07,703 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-06 17:11:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:07,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 5 times [2021-12-06 17:11:07,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:07,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780560654] [2021-12-06 17:11:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:07,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:07,707 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:07,709 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:07,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 17:11:07,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 17:11:07,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-12-06 17:11:07,740 INFO L87 Difference]: Start difference. First operand 1841 states and 1970 transitions. cyclomatic complexity: 170 Second operand has 25 states, 24 states have (on average 5.458333333333333) internal successors, (131), 25 states have internal predecessors, (131), 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) [2021-12-06 17:11:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 17:11:08,387 INFO L93 Difference]: Finished difference Result 5887 states and 6200 transitions. [2021-12-06 17:11:08,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-06 17:11:08,388 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 5887 states and 6200 transitions. [2021-12-06 17:11:08,414 INFO L131 ngComponentsAnalysis]: Automaton has 9 accepting balls. 1451 [2021-12-06 17:11:08,441 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 5887 states to 5733 states and 6032 transitions. [2021-12-06 17:11:08,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 2218 [2021-12-06 17:11:08,443 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 2218 [2021-12-06 17:11:08,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5733 states and 6032 transitions. [2021-12-06 17:11:08,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-06 17:11:08,444 INFO L681 BuchiCegarLoop]: Abstraction has 5733 states and 6032 transitions. [2021-12-06 17:11:08,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5733 states and 6032 transitions. [2021-12-06 17:11:08,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5733 to 2137. [2021-12-06 17:11:08,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2137 states, 2137 states have (on average 1.0608329433785681) internal successors, (2267), 2136 states have internal predecessors, (2267), 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) [2021-12-06 17:11:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2137 states to 2137 states and 2267 transitions. [2021-12-06 17:11:08,487 INFO L704 BuchiCegarLoop]: Abstraction has 2137 states and 2267 transitions. [2021-12-06 17:11:08,487 INFO L587 BuchiCegarLoop]: Abstraction has 2137 states and 2267 transitions. [2021-12-06 17:11:08,487 INFO L425 BuchiCegarLoop]: ======== Iteration 15============ [2021-12-06 17:11:08,487 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 2137 states and 2267 transitions. [2021-12-06 17:11:08,497 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 488 [2021-12-06 17:11:08,497 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-06 17:11:08,497 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-06 17:11:08,498 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [21, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2021-12-06 17:11:08,498 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 17:11:08,498 INFO L791 eck$LassoCheckResult]: Stem: 17845#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 17846#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~i~0#1, main_~range~0#1, main_~up~0#1;havoc main_~i~0#1;havoc main_~range~0#1;havoc main_~up~0#1;main_~i~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1;main_~range~0#1 := 20;main_~up~0#1 := 0; 17859#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18107#L14 assume !(0 == main_~i~0#1); 18105#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 18106#L17-1 assume !(1 == main_~up~0#1); 18919#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18918#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 18917#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18916#L14 assume !(0 == main_~i~0#1); 18915#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18914#L17-1 assume !(1 == main_~up~0#1); 18913#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18911#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18910#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18909#L14 assume !(0 == main_~i~0#1); 18908#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18907#L17-1 assume !(1 == main_~up~0#1); 18906#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18904#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18903#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18902#L14 assume !(0 == main_~i~0#1); 18901#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18900#L17-1 assume !(1 == main_~up~0#1); 18899#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18897#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18896#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18895#L14 assume !(0 == main_~i~0#1); 18894#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18893#L17-1 assume !(1 == main_~up~0#1); 18892#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18890#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18889#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18888#L14 assume !(0 == main_~i~0#1); 18887#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18886#L17-1 assume !(1 == main_~up~0#1); 18885#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18883#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18882#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18881#L14 assume !(0 == main_~i~0#1); 18880#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18879#L17-1 assume !(1 == main_~up~0#1); 18878#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18876#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18875#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18874#L14 assume !(0 == main_~i~0#1); 18873#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18872#L17-1 assume !(1 == main_~up~0#1); 18871#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18869#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18868#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18867#L14 assume !(0 == main_~i~0#1); 18866#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18865#L17-1 assume !(1 == main_~up~0#1); 18864#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18863#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18862#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18860#L14 assume !(0 == main_~i~0#1); 18858#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18856#L17-1 assume !(1 == main_~up~0#1); 18854#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18852#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18850#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18848#L14 assume !(0 == main_~i~0#1); 18846#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18844#L17-1 assume !(1 == main_~up~0#1); 18842#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18840#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18838#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18836#L14 assume !(0 == main_~i~0#1); 18834#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18832#L17-1 assume !(1 == main_~up~0#1); 18830#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18828#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18826#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18824#L14 assume !(0 == main_~i~0#1); 18822#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18820#L17-1 assume !(1 == main_~up~0#1); 18818#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18816#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18814#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18812#L14 assume !(0 == main_~i~0#1); 18810#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18808#L17-1 assume !(1 == main_~up~0#1); 18806#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18804#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18802#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18800#L14 assume !(0 == main_~i~0#1); 18798#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18796#L17-1 assume !(1 == main_~up~0#1); 18794#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18790#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18788#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18786#L14 assume !(0 == main_~i~0#1); 18784#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18782#L17-1 assume !(1 == main_~up~0#1); 18780#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18776#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18774#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18772#L14 assume !(0 == main_~i~0#1); 18770#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18768#L17-1 assume !(1 == main_~up~0#1); 18766#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18762#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18760#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18758#L14 assume !(0 == main_~i~0#1); 18756#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18754#L17-1 assume !(1 == main_~up~0#1); 18752#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18750#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18739#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18737#L14 assume !(0 == main_~i~0#1); 18735#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18733#L17-1 assume !(1 == main_~up~0#1); 18730#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18731#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18551#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18642#L14 assume !(0 == main_~i~0#1); 18563#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18561#L17-1 assume !(1 == main_~up~0#1); 18559#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18549#L23-1 assume main_~i~0#1 == main_~range~0#1 - 2;main_~range~0#1 := main_~range~0#1 - 1; 18550#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18590#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 17889#L14-2 [2021-12-06 17:11:08,498 INFO L793 eck$LassoCheckResult]: Loop: 17889#L14-2 assume !(main_~i~0#1 == main_~range~0#1); 18586#L17-1 assume 1 == main_~up~0#1;main_~i~0#1 := 1 + main_~i~0#1; 18584#L20-1 assume !(0 == main_~up~0#1); 18581#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 18579#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18576#L14 assume !(0 == main_~i~0#1); 18574#L14-2 assume main_~i~0#1 == main_~range~0#1;main_~up~0#1 := 0; 18572#L17-1 assume !(1 == main_~up~0#1); 18570#L20-1 assume 0 == main_~up~0#1;main_~i~0#1 := main_~i~0#1 - 1; 18567#L23-1 assume !(main_~i~0#1 == main_~range~0#1 - 2); 18547#L26-1 assume !!(0 <= main_~i~0#1 && main_~i~0#1 <= main_~range~0#1); 18564#L14 assume 0 == main_~i~0#1;main_~up~0#1 := 1; 17889#L14-2 [2021-12-06 17:11:08,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1715097854, now seen corresponding path program 5 times [2021-12-06 17:11:08,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:08,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623613302] [2021-12-06 17:11:08,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:08,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:08,518 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:08,534 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:08,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:08,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1010763299, now seen corresponding path program 6 times [2021-12-06 17:11:08,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:08,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621309758] [2021-12-06 17:11:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:08,535 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:08,537 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:08,539 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:08,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 17:11:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -989936736, now seen corresponding path program 1 times [2021-12-06 17:11:08,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 17:11:08,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715830484] [2021-12-06 17:11:08,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 17:11:08,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 17:11:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:08,554 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-06 17:11:08,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-06 17:11:08,570 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-06 17:11:09,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 06.12 05:11:09 BoogieIcfgContainer [2021-12-06 17:11:09,195 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-12-06 17:11:09,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-06 17:11:09,195 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-06 17:11:09,196 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-06 17:11:09,196 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 05:11:02" (3/4) ... [2021-12-06 17:11:09,197 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-12-06 17:11:09,234 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/witness.graphml [2021-12-06 17:11:09,234 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-06 17:11:09,234 INFO L158 Benchmark]: Toolchain (without parser) took 7281.99ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 100.5MB in the beginning and 96.3MB in the end (delta: 4.2MB). Peak memory consumption was 35.6MB. Max. memory is 16.1GB. [2021-12-06 17:11:09,234 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 138.4MB. Free memory is still 116.5MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:11:09,234 INFO L158 Benchmark]: CACSL2BoogieTranslator took 148.50ms. Allocated memory is still 138.4MB. Free memory was 100.4MB in the beginning and 91.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:11:09,235 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.54ms. Allocated memory is still 138.4MB. Free memory was 91.6MB in the beginning and 90.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 17:11:09,235 INFO L158 Benchmark]: Boogie Preprocessor took 12.42ms. Allocated memory is still 138.4MB. Free memory was 90.2MB in the beginning and 89.3MB in the end (delta: 916.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 17:11:09,235 INFO L158 Benchmark]: RCFGBuilder took 181.77ms. Allocated memory is still 138.4MB. Free memory was 89.3MB in the beginning and 80.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-06 17:11:09,235 INFO L158 Benchmark]: BuchiAutomizer took 6874.63ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 80.4MB in the beginning and 101.5MB in the end (delta: -21.2MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. [2021-12-06 17:11:09,236 INFO L158 Benchmark]: Witness Printer took 38.25ms. Allocated memory is still 167.8MB. Free memory was 101.5MB in the beginning and 96.3MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-06 17:11:09,237 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 138.4MB. Free memory is still 116.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 148.50ms. Allocated memory is still 138.4MB. Free memory was 100.4MB in the beginning and 91.6MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.54ms. Allocated memory is still 138.4MB. Free memory was 91.6MB in the beginning and 90.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.42ms. Allocated memory is still 138.4MB. Free memory was 90.2MB in the beginning and 89.3MB in the end (delta: 916.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 181.77ms. Allocated memory is still 138.4MB. Free memory was 89.3MB in the beginning and 80.5MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 6874.63ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 80.4MB in the beginning and 101.5MB in the end (delta: -21.2MB). Peak memory consumption was 71.2MB. Max. memory is 16.1GB. * Witness Printer took 38.25ms. Allocated memory is still 167.8MB. Free memory was 101.5MB in the beginning and 96.3MB in the end (delta: 5.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 16 terminating modules (12 trivial, 3 deterministic, 1 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -1 * i + range and consists of 4 locations. One deterministic module has affine ranking function i and consists of 4 locations. One nondeterministic module has affine ranking function -1 * i + range and consists of 4 locations. 12 modules have a trivial ranking function, the largest among these consists of 25 locations. The remainder module has 2137 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.8s and 15 iterations. TraceHistogramMax:21. Analysis of lassos took 4.4s. Construction of modules took 0.5s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 13. Automata minimization 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 4733 StatesRemovedByMinimization, 14 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 2137 states and ocurred in iteration 14. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 726 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 720 mSDsluCounter, 501 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 302 mSDsCounter, 180 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1262 IncrementalHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 180 mSolverCounterUnsat, 199 mSDtfsCounter, 1262 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont1 unkn0 SFLI3 SFLT2 conc2 concLT0 SILN4 SILU0 SILI1 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital28 mio100 ax143 hnf100 lsp60 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq176 hnf96 smp65 dnf131 smp96 tf106 neg91 sie117 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 22ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 7 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.9s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {i=0, \result=0, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@559b2d4c=0, up=1, range=1} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int range; [L8] int up; [L9] i = __VERIFIER_nondet_int() [L10] range = 20 [L11] up = 0 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND TRUE i == range [L18] up = 0 [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 Loop: [L17] COND FALSE !(i == range) [L20] COND TRUE up == 1 [L21] i = i+1 [L23] COND FALSE !(up == 0) [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND TRUE i == range [L18] up = 0 [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-12-06 17:11:09,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-12-06 17:11:09,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-12-06 17:11:09,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-12-06 17:11:09,882 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-12-06 17:11:10,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-06 17:11:10,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c00ead1-0cf6-4a66-8c5c-eb6565b3232e/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM)