./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Narrowing.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 23:54:52,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 23:54:52,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 23:54:52,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 23:54:52,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 23:54:52,196 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 23:54:52,199 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 23:54:52,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 23:54:52,208 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 23:54:52,215 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 23:54:52,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 23:54:52,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 23:54:52,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 23:54:52,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 23:54:52,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 23:54:52,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 23:54:52,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 23:54:52,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 23:54:52,240 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 23:54:52,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 23:54:52,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 23:54:52,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 23:54:52,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 23:54:52,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 23:54:52,275 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 23:54:52,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 23:54:52,276 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 23:54:52,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 23:54:52,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 23:54:52,282 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 23:54:52,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 23:54:52,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 23:54:52,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 23:54:52,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 23:54:52,290 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 23:54:52,291 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 23:54:52,291 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 23:54:52,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 23:54:52,292 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 23:54:52,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 23:54:52,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 23:54:52,296 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-28 23:54:52,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 23:54:52,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 23:54:52,365 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 23:54:52,365 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 23:54:52,367 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 23:54:52,368 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 23:54:52,368 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 23:54:52,368 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-28 23:54:52,369 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-28 23:54:52,369 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-28 23:54:52,371 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-28 23:54:52,371 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-28 23:54:52,371 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-28 23:54:52,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 23:54:52,372 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 23:54:52,372 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 23:54:52,372 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 23:54:52,373 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-28 23:54:52,373 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-28 23:54:52,373 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-28 23:54:52,374 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 23:54:52,374 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-28 23:54:52,374 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 23:54:52,374 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-28 23:54:52,375 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 23:54:52,375 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 23:54:52,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 23:54:52,378 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 23:54:52,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 23:54:52,379 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-28 23:54:52,380 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_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 65d96571ae692dc892a607d17412b050d92bd8365fc1d6c09a627f6750d6e1ac [2021-10-28 23:54:52,745 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 23:54:52,772 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 23:54:52,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 23:54:52,778 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 23:54:52,779 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 23:54:52,780 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-10-28 23:54:52,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/data/0fc1e0c16/e05a07ed9aef40e58ebc22060a194dd0/FLAG19b71d00a [2021-10-28 23:54:53,471 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 23:54:53,471 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/sv-benchmarks/c/termination-restricted-15/Narrowing.c [2021-10-28 23:54:53,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/data/0fc1e0c16/e05a07ed9aef40e58ebc22060a194dd0/FLAG19b71d00a [2021-10-28 23:54:53,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/data/0fc1e0c16/e05a07ed9aef40e58ebc22060a194dd0 [2021-10-28 23:54:53,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 23:54:53,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 23:54:53,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 23:54:53,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 23:54:53,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 23:54:53,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:54:53" (1/1) ... [2021-10-28 23:54:53,868 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dc27ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:53, skipping insertion in model container [2021-10-28 23:54:53,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 11:54:53" (1/1) ... [2021-10-28 23:54:53,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 23:54:53,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 23:54:54,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:54:54,163 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 23:54:54,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 23:54:54,208 INFO L208 MainTranslator]: Completed translation [2021-10-28 23:54:54,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54 WrapperNode [2021-10-28 23:54:54,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 23:54:54,211 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 23:54:54,211 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 23:54:54,212 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 23:54:54,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,231 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,257 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 23:54:54,259 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 23:54:54,259 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 23:54:54,259 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 23:54:54,270 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,272 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 23:54:54,291 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 23:54:54,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 23:54:54,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 23:54:54,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (1/1) ... [2021-10-28 23:54:54,304 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:54,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:54,334 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:54,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-28 23:54:54,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 23:54:54,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 23:54:54,635 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 23:54:54,635 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-28 23:54:54,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:54:54 BoogieIcfgContainer [2021-10-28 23:54:54,639 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 23:54:54,641 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-28 23:54:54,641 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-28 23:54:54,646 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-28 23:54:54,647 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:54:54,647 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 28.10 11:54:53" (1/3) ... [2021-10-28 23:54:54,649 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7e08e965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:54:54, skipping insertion in model container [2021-10-28 23:54:54,649 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:54:54,649 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 11:54:54" (2/3) ... [2021-10-28 23:54:54,650 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@7e08e965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 28.10 11:54:54, skipping insertion in model container [2021-10-28 23:54:54,650 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-28 23:54:54,650 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:54:54" (3/3) ... [2021-10-28 23:54:54,652 INFO L389 chiAutomizerObserver]: Analyzing ICFG Narrowing.c [2021-10-28 23:54:54,750 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-28 23:54:54,751 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-28 23:54:54,751 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-28 23:54:54,751 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-28 23:54:54,751 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-28 23:54:54,752 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-28 23:54:54,752 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-28 23:54:54,752 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-28 23:54:54,772 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:54,804 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 23:54:54,804 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:54:54,805 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:54:54,812 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:54:54,812 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:54:54,812 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-28 23:54:54,813 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:54,815 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-10-28 23:54:54,815 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:54:54,816 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:54:54,816 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:54:54,816 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:54:54,824 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 5#L26-1true [2021-10-28 23:54:54,825 INFO L793 eck$LassoCheckResult]: Loop: 5#L26-1true assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 11#L14true assume 0 == main_~i~0;main_~up~0 := 1; 12#L14-2true assume main_~i~0 == main_~range~0;main_~up~0 := 0; 9#L17-1true assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 7#L20-1true assume !(0 == main_~up~0); 10#L23-1true assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5#L26-1true [2021-10-28 23:54:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:54,837 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-28 23:54:54,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:54,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930360665] [2021-10-28 23:54:54,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:54,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:54,961 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:54,993 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:54,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1186392078, now seen corresponding path program 1 times [2021-10-28 23:54:55,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948541102] [2021-10-28 23:54:55,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:54:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:54:55,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:54:55,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948541102] [2021-10-28 23:54:55,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948541102] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:54:55,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:54:55,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:54:55,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425911326] [2021-10-28 23:54:55,156 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:54:55,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:54:55,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:54:55,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:54:55,208 INFO L87 Difference]: Start difference. First operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:54:55,249 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2021-10-28 23:54:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:54:55,251 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 21 states and 30 transitions. [2021-10-28 23:54:55,254 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:54:55,258 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 21 states to 13 states and 22 transitions. [2021-10-28 23:54:55,260 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-28 23:54:55,260 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-28 23:54:55,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 22 transitions. [2021-10-28 23:54:55,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:54:55,262 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-28 23:54:55,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 22 transitions. [2021-10-28 23:54:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 23:54:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 22 transitions. [2021-10-28 23:54:55,306 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-28 23:54:55,307 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 22 transitions. [2021-10-28 23:54:55,307 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-28 23:54:55,307 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 22 transitions. [2021-10-28 23:54:55,308 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:54:55,308 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:54:55,308 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:54:55,309 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:54:55,309 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:54:55,325 INFO L791 eck$LassoCheckResult]: Stem: 41#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 42#L26-1 [2021-10-28 23:54:55,326 INFO L793 eck$LassoCheckResult]: Loop: 42#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 53#L14 assume 0 == main_~i~0;main_~up~0 := 1; 50#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 48#L17-1 assume !(1 == main_~up~0); 49#L20-1 assume !(0 == main_~up~0); 47#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 42#L26-1 [2021-10-28 23:54:55,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,326 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2021-10-28 23:54:55,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588275489] [2021-10-28 23:54:55,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,333 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,338 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:55,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1186394000, now seen corresponding path program 1 times [2021-10-28 23:54:55,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,340 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920709964] [2021-10-28 23:54:55,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,340 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:54:55,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:54:55,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:54:55,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920709964] [2021-10-28 23:54:55,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920709964] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:54:55,385 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:54:55,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:54:55,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255072494] [2021-10-28 23:54:55,386 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:54:55,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:54:55,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:54:55,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:54:55,388 INFO L87 Difference]: Start difference. First operand 13 states and 22 transitions. cyclomatic complexity: 10 Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:55,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:54:55,410 INFO L93 Difference]: Finished difference Result 13 states and 21 transitions. [2021-10-28 23:54:55,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:54:55,412 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 21 transitions. [2021-10-28 23:54:55,413 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:54:55,414 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 21 transitions. [2021-10-28 23:54:55,414 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2021-10-28 23:54:55,415 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2021-10-28 23:54:55,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 21 transitions. [2021-10-28 23:54:55,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:54:55,415 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-28 23:54:55,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 21 transitions. [2021-10-28 23:54:55,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-28 23:54:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:55,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 21 transitions. [2021-10-28 23:54:55,419 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-28 23:54:55,419 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 21 transitions. [2021-10-28 23:54:55,419 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-28 23:54:55,419 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 21 transitions. [2021-10-28 23:54:55,420 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:54:55,421 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:54:55,421 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:54:55,421 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:54:55,421 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:54:55,422 INFO L791 eck$LassoCheckResult]: Stem: 73#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 74#L26-1 [2021-10-28 23:54:55,422 INFO L793 eck$LassoCheckResult]: Loop: 74#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 75#L14 assume !(0 == main_~i~0); 80#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 78#L17-1 assume !(1 == main_~up~0); 76#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 77#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 74#L26-1 [2021-10-28 23:54:55,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,423 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2021-10-28 23:54:55,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,423 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286336141] [2021-10-28 23:54:55,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,441 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,449 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:55,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1188240980, now seen corresponding path program 1 times [2021-10-28 23:54:55,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911096921] [2021-10-28 23:54:55,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,455 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:54:55,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:54:55,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:54:55,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911096921] [2021-10-28 23:54:55,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911096921] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:54:55,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:54:55,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:54:55,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693769257] [2021-10-28 23:54:55,539 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:54:55,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:54:55,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:54:55,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:54:55,542 INFO L87 Difference]: Start difference. First operand 13 states and 21 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:55,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:54:55,650 INFO L93 Difference]: Finished difference Result 33 states and 51 transitions. [2021-10-28 23:54:55,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:54:55,651 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 51 transitions. [2021-10-28 23:54:55,658 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 32 [2021-10-28 23:54:55,664 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 33 states and 51 transitions. [2021-10-28 23:54:55,664 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-28 23:54:55,664 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 33 [2021-10-28 23:54:55,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 51 transitions. [2021-10-28 23:54:55,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-28 23:54:55,665 INFO L681 BuchiCegarLoop]: Abstraction has 33 states and 51 transitions. [2021-10-28 23:54:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states and 51 transitions. [2021-10-28 23:54:55,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2021-10-28 23:54:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 29 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:55,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 47 transitions. [2021-10-28 23:54:55,669 INFO L704 BuchiCegarLoop]: Abstraction has 30 states and 47 transitions. [2021-10-28 23:54:55,670 INFO L587 BuchiCegarLoop]: Abstraction has 30 states and 47 transitions. [2021-10-28 23:54:55,670 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-28 23:54:55,670 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 30 states and 47 transitions. [2021-10-28 23:54:55,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 29 [2021-10-28 23:54:55,673 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:54:55,674 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:54:55,674 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-28 23:54:55,674 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:54:55,674 INFO L791 eck$LassoCheckResult]: Stem: 126#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 127#L26-1 [2021-10-28 23:54:55,675 INFO L793 eck$LassoCheckResult]: Loop: 127#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 144#L14 assume !(0 == main_~i~0); 136#L14-2 assume !(main_~i~0 == main_~range~0); 132#L17-1 assume !(1 == main_~up~0); 133#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 138#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 127#L26-1 [2021-10-28 23:54:55,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2021-10-28 23:54:55,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504366395] [2021-10-28 23:54:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,677 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,682 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,686 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:55,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1188300564, now seen corresponding path program 1 times [2021-10-28 23:54:55,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116855826] [2021-10-28 23:54:55,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,696 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,704 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:55,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:55,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1363856397, now seen corresponding path program 1 times [2021-10-28 23:54:55,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:55,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517571145] [2021-10-28 23:54:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:55,706 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,713 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:55,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:55,722 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:55,866 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:54:55,867 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:54:55,867 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:54:55,868 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:54:55,868 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:54:55,868 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:55,868 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:54:55,869 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:54:55,869 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-10-28 23:54:55,869 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:54:55,869 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:54:55,897 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:55,918 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:55,923 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:55,927 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:56,053 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:54:56,054 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:54:56,057 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,060 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-28 23:54:56,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:56,077 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:56,099 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:54:56,100 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:54:56,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,135 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-28 23:54:56,151 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:56,151 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:56,169 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:54:56,169 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:54:56,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-28 23:54:56,203 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:56,203 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:56,215 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:54:56,215 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=0} Honda state: {ULTIMATE.start_main_~up~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:54:56,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-28 23:54:56,253 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:56,255 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:56,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,316 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,317 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-28 23:54:56,320 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:54:56,320 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:56,375 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:54:56,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,382 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:54:56,382 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:54:56,382 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:54:56,382 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:54:56,382 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:54:56,382 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,382 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:54:56,382 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:54:56,383 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration4_Loop [2021-10-28 23:54:56,383 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:54:56,383 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:54:56,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:56,391 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:56,395 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:56,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:56,519 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:54:56,525 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:54:56,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,529 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-28 23:54:56,554 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:56,566 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:56,566 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:56,568 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:56,568 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:56,568 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:56,572 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:54:56,572 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:56,586 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:56,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-10-28 23:54:56,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,627 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-28 23:54:56,631 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:56,640 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:56,640 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:56,640 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:56,640 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:56,645 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:54:56,645 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:54:56,681 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:56,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,724 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,726 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,735 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:56,747 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:56,747 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:56,748 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:56,748 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:56,753 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:54:56,753 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:54:56,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-28 23:54:56,767 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:56,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-10-28 23:54:56,827 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:56,837 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:56,838 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:56,838 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:56,838 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:56,838 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:56,841 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:54:56,841 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:56,854 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:54:56,860 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:54:56,861 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:54:56,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:56,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:56,871 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:56,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-28 23:54:56,894 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:54:56,894 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:54:56,895 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:54:56,895 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 23:54:56,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:56,930 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:54:56,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:54:56,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:54:56,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:54:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:54:57,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:54:57,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:54:57,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:54:57,187 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:54:57,188 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 30 states and 47 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:57,280 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 30 states and 47 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 76 states and 117 transitions. Complement of second has 7 states. [2021-10-28 23:54:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:54:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:57,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 15 transitions. [2021-10-28 23:54:57,287 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 1 letters. Loop has 6 letters. [2021-10-28 23:54:57,289 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:54:57,289 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 7 letters. Loop has 6 letters. [2021-10-28 23:54:57,290 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:54:57,290 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 15 transitions. Stem has 1 letters. Loop has 12 letters. [2021-10-28 23:54:57,292 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:54:57,292 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 76 states and 117 transitions. [2021-10-28 23:54:57,307 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 41 [2021-10-28 23:54:57,310 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 76 states to 71 states and 108 transitions. [2021-10-28 23:54:57,310 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-28 23:54:57,314 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-28 23:54:57,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 108 transitions. [2021-10-28 23:54:57,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:54:57,315 INFO L681 BuchiCegarLoop]: Abstraction has 71 states and 108 transitions. [2021-10-28 23:54:57,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states and 108 transitions. [2021-10-28 23:54:57,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-10-28 23:54:57,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:54:57,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 107 transitions. [2021-10-28 23:54:57,328 INFO L704 BuchiCegarLoop]: Abstraction has 70 states and 107 transitions. [2021-10-28 23:54:57,329 INFO L587 BuchiCegarLoop]: Abstraction has 70 states and 107 transitions. [2021-10-28 23:54:57,329 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-28 23:54:57,329 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 70 states and 107 transitions. [2021-10-28 23:54:57,331 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 41 [2021-10-28 23:54:57,331 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:54:57,331 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:54:57,332 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-28 23:54:57,332 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:54:57,332 INFO L791 eck$LassoCheckResult]: Stem: 277#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 278#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 295#L14 assume 0 == main_~i~0;main_~up~0 := 1; 296#L14-2 [2021-10-28 23:54:57,332 INFO L793 eck$LassoCheckResult]: Loop: 296#L14-2 assume !(main_~i~0 == main_~range~0); 325#L17-1 assume !(1 == main_~up~0); 323#L20-1 assume !(0 == main_~up~0); 320#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 319#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 318#L14 assume 0 == main_~i~0;main_~up~0 := 1; 296#L14-2 [2021-10-28 23:54:57,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:57,333 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-28 23:54:57,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:57,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286165183] [2021-10-28 23:54:57,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:57,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:57,362 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:57,367 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1514671824, now seen corresponding path program 1 times [2021-10-28 23:54:57,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:57,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56980584] [2021-10-28 23:54:57,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:57,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:57,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:57,385 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:54:57,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:54:57,400 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:54:57,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:54:57,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1819047602, now seen corresponding path program 1 times [2021-10-28 23:54:57,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:54:57,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312894296] [2021-10-28 23:54:57,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:54:57,402 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:54:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:54:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:54:57,443 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:54:57,443 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312894296] [2021-10-28 23:54:57,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312894296] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:54:57,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:54:57,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:54:57,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486150602] [2021-10-28 23:54:57,524 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:54:57,524 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:54:57,524 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:54:57,524 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:54:57,524 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:54:57,525 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:57,525 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:54:57,525 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:54:57,525 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration5_Loop [2021-10-28 23:54:57,525 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:54:57,525 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:54:57,529 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:57,532 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:57,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:57,549 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:57,745 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:54:57,745 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:54:57,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:57,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:57,750 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:57,760 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:57,760 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:57,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-28 23:54:57,782 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:54:57,782 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:54:57,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:57,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:57,832 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:57,841 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:57,841 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:57,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-28 23:54:57,863 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:54:57,863 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:54:57,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:57,910 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:57,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:57,912 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:57,923 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:57,923 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:57,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-28 23:54:57,958 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:54:57,958 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~range~0=3, ULTIMATE.start_main_~i~0=0} Honda state: {ULTIMATE.start_main_~range~0=3, ULTIMATE.start_main_~i~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:54:58,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,009 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:54:58,014 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:58,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-28 23:54:58,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,102 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,107 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-28 23:54:58,119 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:54:58,119 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:54:58,191 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:54:58,198 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,199 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:54:58,199 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:54:58,199 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:54:58,199 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:54:58,199 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:54:58,199 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,199 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:54:58,199 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:54:58,199 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration5_Loop [2021-10-28 23:54:58,199 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:54:58,200 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:54:58,201 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:58,209 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:58,221 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:58,226 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:54:58,425 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:54:58,425 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:54:58,425 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,427 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,430 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:58,442 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:58,442 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:58,442 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:58,442 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:58,449 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:54:58,451 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:54:58,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-28 23:54:58,465 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:58,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,517 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-28 23:54:58,526 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:58,538 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:58,538 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:58,539 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:58,539 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:58,539 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:58,541 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 23:54:58,541 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:58,565 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:58,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,609 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,614 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,674 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Ended with exit code 0 [2021-10-28 23:54:58,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-28 23:54:58,689 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:58,701 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:58,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:58,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:58,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:58,708 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:54:58,708 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:54:58,726 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:58,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,802 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,803 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-28 23:54:58,810 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:58,819 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:58,819 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:58,819 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:58,820 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:58,820 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:54:58,822 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 23:54:58,822 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:58,852 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:58,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,899 INFO L490 LassoAnalysis]: Using template '2-nested'. [2021-10-28 23:54:58,899 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:58,902 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:58,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-28 23:54:58,912 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:58,924 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:58,924 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:58,924 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:58,925 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:54:58,930 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 23:54:58,930 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 23:54:58,952 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:58,997 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:58,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:58,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,002 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,007 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,019 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,019 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:59,019 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,019 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:59,019 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:54:59,022 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:54:59,023 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:59,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-28 23:54:59,037 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,086 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,091 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,108 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,108 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,109 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:59,109 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:54:59,114 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 23:54:59,114 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 23:54:59,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-28 23:54:59,133 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,183 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,186 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-28 23:54:59,197 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,198 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:59,198 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,198 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:59,198 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:54:59,201 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:54:59,202 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:59,217 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,265 INFO L490 LassoAnalysis]: Using template '3-nested'. [2021-10-28 23:54:59,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,267 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,274 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,286 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,286 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,287 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:59,287 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:54:59,292 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:54:59,292 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 23:54:59,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-28 23:54:59,315 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,361 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,368 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,380 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,380 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:59,380 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,381 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:59,381 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:54:59,385 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 23:54:59,385 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:59,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-28 23:54:59,409 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,452 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,453 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,458 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,470 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,470 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,471 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:59,471 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:54:59,475 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:54:59,475 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 23:54:59,478 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-28 23:54:59,497 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,544 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,549 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,557 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,569 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,570 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:59,570 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,570 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:59,570 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:54:59,573 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 23:54:59,574 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:59,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-28 23:54:59,593 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,635 INFO L490 LassoAnalysis]: Using template '4-nested'. [2021-10-28 23:54:59,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,636 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-28 23:54:59,641 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,650 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,651 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,651 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:59,651 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:54:59,656 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 23:54:59,656 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 23:54:59,685 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Ended with exit code 0 [2021-10-28 23:54:59,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,716 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-28 23:54:59,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,727 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,728 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:59,728 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,728 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:59,728 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:54:59,733 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 23:54:59,733 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:59,746 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-10-28 23:54:59,782 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,792 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,792 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:59,792 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:54:59,797 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 23:54:59,798 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 23:54:59,821 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,869 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-10-28 23:54:59,870 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,881 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:54:59,881 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:54:59,881 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,881 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:54:59,881 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:54:59,885 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 23:54:59,885 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:54:59,893 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:54:59,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-10-28 23:54:59,922 INFO L490 LassoAnalysis]: Using template '2-phase'. [2021-10-28 23:54:59,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:54:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:54:59,924 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:54:59,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-10-28 23:54:59,926 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:54:59,935 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:54:59,935 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:54:59,936 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:54:59,936 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:54:59,936 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:54:59,939 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 23:54:59,939 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 23:54:59,969 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,010 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-10-28 23:55:00,011 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,021 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,021 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:00,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:00,021 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,022 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:00,022 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:55:00,025 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:55:00,025 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:00,054 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-10-28 23:55:00,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,087 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-10-28 23:55:00,088 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,097 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,098 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:00,098 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,098 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:00,098 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:55:00,103 INFO L401 nArgumentSynthesizer]: We have 9 Motzkin's Theorem applications. [2021-10-28 23:55:00,103 INFO L402 nArgumentSynthesizer]: A total of 3 supporting invariants were added. [2021-10-28 23:55:00,129 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,171 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,174 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,176 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,187 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,188 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:00,188 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:00,188 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,188 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:00,188 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-10-28 23:55:00,191 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:55:00,191 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:00,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-10-28 23:55:00,221 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,261 INFO L490 LassoAnalysis]: Using template '3-phase'. [2021-10-28 23:55:00,262 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,266 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,272 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,284 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,285 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 23:55:00,285 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,285 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:00,285 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:00,293 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:55:00,293 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 23:55:00,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-10-28 23:55:00,329 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,377 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,383 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,394 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,395 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 23:55:00,395 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:00,395 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,395 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:00,395 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:00,402 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 23:55:00,402 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:00,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Waiting until timeout for monitored process [2021-10-28 23:55:00,425 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (38)] Ended with exit code 0 [2021-10-28 23:55:00,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,466 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Waiting until timeout for monitored process [2021-10-28 23:55:00,468 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,477 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,477 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 23:55:00,477 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,477 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:00,478 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:00,483 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:55:00,483 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 23:55:00,498 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (39)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,530 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Waiting until timeout for monitored process [2021-10-28 23:55:00,532 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,542 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,542 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-10-28 23:55:00,542 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:00,542 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,542 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:00,543 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:00,548 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 23:55:00,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:00,569 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (40)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,611 INFO L490 LassoAnalysis]: Using template '4-phase'. [2021-10-28 23:55:00,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,612 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,622 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,634 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,634 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:00,634 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,635 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:00,635 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:55:00,641 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 23:55:00,641 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 23:55:00,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Waiting until timeout for monitored process [2021-10-28 23:55:00,665 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (41)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,710 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,711 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,714 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,726 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,726 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:00,726 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:00,726 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,726 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:00,726 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:55:00,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Waiting until timeout for monitored process [2021-10-28 23:55:00,735 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 23:55:00,735 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:00,755 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (42)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,796 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,798 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,802 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,814 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,814 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:00,814 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,814 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:00,814 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:55:00,823 INFO L401 nArgumentSynthesizer]: We have 15 Motzkin's Theorem applications. [2021-10-28 23:55:00,823 INFO L402 nArgumentSynthesizer]: A total of 5 supporting invariants were added. [2021-10-28 23:55:00,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Waiting until timeout for monitored process [2021-10-28 23:55:00,845 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,886 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (43)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,888 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,891 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,904 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,904 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:00,904 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:00,904 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,904 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:00,904 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-10-28 23:55:00,911 INFO L401 nArgumentSynthesizer]: We have 10 Motzkin's Theorem applications. [2021-10-28 23:55:00,911 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Waiting until timeout for monitored process [2021-10-28 23:55:00,941 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:00,981 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (44)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:00,982 INFO L490 LassoAnalysis]: Using template '2-lex'. [2021-10-28 23:55:00,982 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:00,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:00,983 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:00,985 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:00,997 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:00,997 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:00,997 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:00,997 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:00,997 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:01,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Waiting until timeout for monitored process [2021-10-28 23:55:01,024 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:55:01,024 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 23:55:01,039 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (45)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,084 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,085 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,092 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,103 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,103 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:01,103 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:01,104 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,104 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:01,104 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:01,107 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 23:55:01,107 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:01,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Waiting until timeout for monitored process [2021-10-28 23:55:01,133 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (46)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,174 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,177 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,181 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,192 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,192 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:01,193 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,193 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:01,193 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:01,197 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:55:01,197 INFO L402 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2021-10-28 23:55:01,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Waiting until timeout for monitored process [2021-10-28 23:55:01,217 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (47)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,260 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,266 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,278 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,278 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-10-28 23:55:01,278 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:01,278 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,278 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:01,278 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-10-28 23:55:01,281 INFO L401 nArgumentSynthesizer]: We have 8 Motzkin's Theorem applications. [2021-10-28 23:55:01,281 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:01,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Waiting until timeout for monitored process [2021-10-28 23:55:01,300 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (48)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,341 INFO L490 LassoAnalysis]: Using template '3-lex'. [2021-10-28 23:55:01,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,342 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,344 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Waiting until timeout for monitored process [2021-10-28 23:55:01,356 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,356 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:01,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,357 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:01,357 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 23:55:01,362 INFO L401 nArgumentSynthesizer]: We have 18 Motzkin's Theorem applications. [2021-10-28 23:55:01,362 INFO L402 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2021-10-28 23:55:01,389 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (49)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,431 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,433 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,445 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,445 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:01,445 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:01,446 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,446 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:01,446 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 23:55:01,451 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:55:01,451 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:01,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Waiting until timeout for monitored process [2021-10-28 23:55:01,473 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (50)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,514 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,515 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,517 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,529 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,529 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:01,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:01,529 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 23:55:01,535 INFO L401 nArgumentSynthesizer]: We have 18 Motzkin's Theorem applications. [2021-10-28 23:55:01,535 INFO L402 nArgumentSynthesizer]: A total of 6 supporting invariants were added. [2021-10-28 23:55:01,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Waiting until timeout for monitored process [2021-10-28 23:55:01,565 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (51)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,606 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:01,607 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:01,610 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:01,621 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-10-28 23:55:01,621 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-10-28 23:55:01,621 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:01,622 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:01,622 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:01,622 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-10-28 23:55:01,627 INFO L401 nArgumentSynthesizer]: We have 12 Motzkin's Theorem applications. [2021-10-28 23:55:01,627 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:01,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Waiting until timeout for monitored process [2021-10-28 23:55:01,649 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:01,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (52)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:01,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:01,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 23:55:01,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 23:55:01,693 INFO L87 Difference]: Start difference. First operand 70 states and 107 transitions. cyclomatic complexity: 41 Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:01,711 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2021-10-28 23:55:01,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 23:55:01,712 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 52 states and 71 transitions. [2021-10-28 23:55:01,714 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 27 [2021-10-28 23:55:01,715 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 52 states to 50 states and 69 transitions. [2021-10-28 23:55:01,715 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 37 [2021-10-28 23:55:01,716 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 37 [2021-10-28 23:55:01,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 69 transitions. [2021-10-28 23:55:01,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:01,716 INFO L681 BuchiCegarLoop]: Abstraction has 50 states and 69 transitions. [2021-10-28 23:55:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states and 69 transitions. [2021-10-28 23:55:01,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-28 23:55:01,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:01,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-28 23:55:01,722 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-28 23:55:01,723 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-28 23:55:01,723 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-10-28 23:55:01,723 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 57 transitions. [2021-10-28 23:55:01,724 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 23:55:01,724 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:01,724 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:01,725 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 23:55:01,725 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:55:01,725 INFO L791 eck$LassoCheckResult]: Stem: 407#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 408#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 429#L14 assume 0 == main_~i~0;main_~up~0 := 1; 438#L14-2 assume !(main_~i~0 == main_~range~0); 417#L17-1 [2021-10-28 23:55:01,726 INFO L793 eck$LassoCheckResult]: Loop: 417#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 418#L20-1 assume !(0 == main_~up~0); 432#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 442#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 447#L14 assume 0 == main_~i~0;main_~up~0 := 1; 444#L14-2 assume !(main_~i~0 == main_~range~0); 417#L17-1 [2021-10-28 23:55:01,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:01,726 INFO L85 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 1 times [2021-10-28 23:55:01,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:01,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617298704] [2021-10-28 23:55:01,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:01,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:01,738 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:01,749 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:01,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:01,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1634880532, now seen corresponding path program 1 times [2021-10-28 23:55:01,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:01,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294856789] [2021-10-28 23:55:01,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:01,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:01,764 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:01,773 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:01,779 INFO L85 PathProgramCache]: Analyzing trace with hash 498642533, now seen corresponding path program 1 times [2021-10-28 23:55:01,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:01,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270469164] [2021-10-28 23:55:01,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:01,780 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:01,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:01,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270469164] [2021-10-28 23:55:01,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270469164] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:01,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:01,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:55:01,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250635309] [2021-10-28 23:55:01,908 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:01,908 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:01,909 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:01,909 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:01,909 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:55:01,909 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:01,909 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:01,909 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:01,910 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration6_Loop [2021-10-28 23:55:01,910 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:01,910 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:01,913 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:01,917 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:01,924 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:01,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:02,146 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:02,147 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:55:02,147 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,162 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,182 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:02,183 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:02,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Waiting until timeout for monitored process [2021-10-28 23:55:02,206 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:55:02,206 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:55:02,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (53)] Ended with exit code 0 [2021-10-28 23:55:02,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,247 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Waiting until timeout for monitored process [2021-10-28 23:55:02,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:02,249 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:02,260 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:55:02,260 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:55:02,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (54)] Ended with exit code 0 [2021-10-28 23:55:02,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,287 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Waiting until timeout for monitored process [2021-10-28 23:55:02,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:02,289 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:02,304 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:55:02,304 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_5=0} Honda state: {v_rep~unnamed0~0~false_5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:55:02,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (55)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:02,330 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,330 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Waiting until timeout for monitored process [2021-10-28 23:55:02,332 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:02,332 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:02,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (56)] Ended with exit code 0 [2021-10-28 23:55:02,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,405 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Waiting until timeout for monitored process [2021-10-28 23:55:02,407 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:55:02,407 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:02,640 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:55:02,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (57)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:02,644 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:02,644 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:02,644 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:02,644 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:02,644 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:55:02,644 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,644 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:02,644 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:02,644 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration6_Loop [2021-10-28 23:55:02,645 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:02,645 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:02,646 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:02,661 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:02,666 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:02,669 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:02,824 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:02,825 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:55:02,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,827 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,838 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:02,850 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:02,850 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:02,851 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:02,851 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:02,853 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:55:02,853 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:55:02,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Waiting until timeout for monitored process [2021-10-28 23:55:02,873 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:02,902 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (58)] Ended with exit code 0 [2021-10-28 23:55:02,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,903 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Waiting until timeout for monitored process [2021-10-28 23:55:02,905 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:02,914 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:02,914 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:02,914 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:02,914 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:02,915 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:02,916 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:55:02,916 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:02,928 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:02,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (59)] Ended with exit code 0 [2021-10-28 23:55:02,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:02,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:02,959 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:02,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Waiting until timeout for monitored process [2021-10-28 23:55:02,961 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:02,973 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:02,973 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:02,973 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:02,974 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:02,975 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:55:02,976 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:55:02,993 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:03,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (60)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:03,038 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:03,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:03,039 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:03,046 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:03,058 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:03,058 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:03,059 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:03,059 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:03,059 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:03,061 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 23:55:03,061 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:03,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Waiting until timeout for monitored process [2021-10-28 23:55:03,077 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:55:03,082 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:55:03,082 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:55:03,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:03,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:03,084 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:03,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Waiting until timeout for monitored process [2021-10-28 23:55:03,086 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:55:03,086 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:55:03,086 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:55:03,086 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 23:55:03,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (61)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:03,116 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:55:03,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:55:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:03,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:55:03,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:03,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:03,242 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:55:03,242 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 57 transitions. cyclomatic complexity: 18 Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:03,307 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 57 transitions. cyclomatic complexity: 18. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 114 states and 153 transitions. Complement of second has 7 states. [2021-10-28 23:55:03,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:55:03,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:03,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 32 transitions. [2021-10-28 23:55:03,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 4 letters. Loop has 6 letters. [2021-10-28 23:55:03,311 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:03,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 23:55:03,311 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:03,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 32 transitions. Stem has 4 letters. Loop has 12 letters. [2021-10-28 23:55:03,312 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:03,312 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 114 states and 153 transitions. [2021-10-28 23:55:03,315 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 42 [2021-10-28 23:55:03,316 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 114 states to 108 states and 144 transitions. [2021-10-28 23:55:03,316 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 62 [2021-10-28 23:55:03,317 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 67 [2021-10-28 23:55:03,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 144 transitions. [2021-10-28 23:55:03,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:03,317 INFO L681 BuchiCegarLoop]: Abstraction has 108 states and 144 transitions. [2021-10-28 23:55:03,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states and 144 transitions. [2021-10-28 23:55:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2021-10-28 23:55:03,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 93 states have (on average 1.3763440860215055) internal successors, (128), 92 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 128 transitions. [2021-10-28 23:55:03,341 INFO L704 BuchiCegarLoop]: Abstraction has 93 states and 128 transitions. [2021-10-28 23:55:03,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:03,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:55:03,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:03,342 INFO L87 Difference]: Start difference. First operand 93 states and 128 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:03,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:03,385 INFO L93 Difference]: Finished difference Result 111 states and 142 transitions. [2021-10-28 23:55:03,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:55:03,386 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 111 states and 142 transitions. [2021-10-28 23:55:03,389 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 50 [2021-10-28 23:55:03,390 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 111 states to 92 states and 118 transitions. [2021-10-28 23:55:03,390 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 67 [2021-10-28 23:55:03,392 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 67 [2021-10-28 23:55:03,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 92 states and 118 transitions. [2021-10-28 23:55:03,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:03,393 INFO L681 BuchiCegarLoop]: Abstraction has 92 states and 118 transitions. [2021-10-28 23:55:03,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states and 118 transitions. [2021-10-28 23:55:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 41. [2021-10-28 23:55:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 40 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2021-10-28 23:55:03,408 INFO L704 BuchiCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-10-28 23:55:03,408 INFO L587 BuchiCegarLoop]: Abstraction has 41 states and 55 transitions. [2021-10-28 23:55:03,408 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-10-28 23:55:03,409 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 41 states and 55 transitions. [2021-10-28 23:55:03,410 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 23:55:03,410 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:03,411 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:03,411 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 23:55:03,411 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:55:03,411 INFO L791 eck$LassoCheckResult]: Stem: 823#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 824#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 843#L14 assume 0 == main_~i~0;main_~up~0 := 1; 857#L14-2 assume !(main_~i~0 == main_~range~0); 833#L17-1 [2021-10-28 23:55:03,412 INFO L793 eck$LassoCheckResult]: Loop: 833#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 834#L20-1 assume !(0 == main_~up~0); 848#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 858#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 863#L14 assume !(0 == main_~i~0); 860#L14-2 assume !(main_~i~0 == main_~range~0); 833#L17-1 [2021-10-28 23:55:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 2 times [2021-10-28 23:55:03,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:03,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271905734] [2021-10-28 23:55:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:03,413 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:03,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:03,434 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:03,449 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:03,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1634880594, now seen corresponding path program 1 times [2021-10-28 23:55:03,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:03,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039581560] [2021-10-28 23:55:03,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:03,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:03,471 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:03,491 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:03,509 INFO L85 PathProgramCache]: Analyzing trace with hash 498642595, now seen corresponding path program 1 times [2021-10-28 23:55:03,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:03,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831232003] [2021-10-28 23:55:03,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:03,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:03,516 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:03,523 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:03,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (62)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:03,595 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:03,596 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:03,596 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:03,596 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:03,596 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:55:03,596 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:03,596 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:03,596 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:03,597 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-10-28 23:55:03,597 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:03,597 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:03,599 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:03,613 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:03,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:03,619 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:03,751 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:03,751 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:55:03,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:03,758 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:03,763 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:03,763 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:03,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Waiting until timeout for monitored process [2021-10-28 23:55:03,814 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (63)] Ended with exit code 0 [2021-10-28 23:55:03,815 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:03,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:03,816 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:03,817 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:55:03,817 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:03,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Waiting until timeout for monitored process [2021-10-28 23:55:04,150 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:55:04,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (64)] Ended with exit code 0 [2021-10-28 23:55:04,154 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:04,154 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:04,154 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:04,154 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:04,154 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:55:04,154 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:04,155 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:04,155 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:04,155 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration7_Loop [2021-10-28 23:55:04,155 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:04,155 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:04,156 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,175 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,178 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,323 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:04,324 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:55:04,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:04,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:04,325 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:04,334 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:04,345 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:04,346 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:04,346 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:04,346 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:04,346 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:04,348 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 23:55:04,348 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:04,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Waiting until timeout for monitored process [2021-10-28 23:55:04,361 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:55:04,365 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:55:04,365 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-28 23:55:04,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:04,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:04,367 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:04,369 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:55:04,370 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:55:04,370 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:55:04,370 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~range~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2021-10-28 23:55:04,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Waiting until timeout for monitored process [2021-10-28 23:55:04,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (65)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:04,413 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:55:04,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:55:04,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:04,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:04,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:04,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:04,536 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:55:04,537 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 41 states and 55 transitions. cyclomatic complexity: 16 Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:04,582 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 41 states and 55 transitions. cyclomatic complexity: 16. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 90 states and 115 transitions. Complement of second has 7 states. [2021-10-28 23:55:04,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:55:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:04,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-10-28 23:55:04,586 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 6 letters. [2021-10-28 23:55:04,587 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:04,587 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 23:55:04,587 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:04,587 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 4 letters. Loop has 12 letters. [2021-10-28 23:55:04,588 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:04,588 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 90 states and 115 transitions. [2021-10-28 23:55:04,589 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 23:55:04,590 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 90 states to 77 states and 98 transitions. [2021-10-28 23:55:04,591 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 41 [2021-10-28 23:55:04,591 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 44 [2021-10-28 23:55:04,591 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 98 transitions. [2021-10-28 23:55:04,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:04,591 INFO L681 BuchiCegarLoop]: Abstraction has 77 states and 98 transitions. [2021-10-28 23:55:04,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states and 98 transitions. [2021-10-28 23:55:04,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2021-10-28 23:55:04,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 71 states have (on average 1.295774647887324) internal successors, (92), 70 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2021-10-28 23:55:04,597 INFO L704 BuchiCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-10-28 23:55:04,597 INFO L587 BuchiCegarLoop]: Abstraction has 71 states and 92 transitions. [2021-10-28 23:55:04,598 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-10-28 23:55:04,598 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 71 states and 92 transitions. [2021-10-28 23:55:04,599 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 23 [2021-10-28 23:55:04,599 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:04,599 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:04,600 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:04,600 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:55:04,600 INFO L791 eck$LassoCheckResult]: Stem: 1009#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 1010#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1067#L14 assume !(0 == main_~i~0); 1068#L14-2 assume !(main_~i~0 == main_~range~0); 1021#L17-1 assume !(1 == main_~up~0); 1022#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1058#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 1060#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1078#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1077#L14-2 assume !(main_~i~0 == main_~range~0); 1076#L17-1 [2021-10-28 23:55:04,601 INFO L793 eck$LassoCheckResult]: Loop: 1076#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1075#L20-1 assume !(0 == main_~up~0); 1023#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1024#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1044#L14 assume !(0 == main_~i~0); 1042#L14-2 assume !(main_~i~0 == main_~range~0); 1076#L17-1 [2021-10-28 23:55:04,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -255352415, now seen corresponding path program 1 times [2021-10-28 23:55:04,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:04,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237959532] [2021-10-28 23:55:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:04,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:04,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:04,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237959532] [2021-10-28 23:55:04,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237959532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:04,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272468162] [2021-10-28 23:55:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:04,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:04,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:04,639 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:04,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-28 23:55:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:04,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 23:55:04,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:04,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272468162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:04,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:04,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 23:55:04,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055137204] [2021-10-28 23:55:04,726 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:04,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:04,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1634880594, now seen corresponding path program 2 times [2021-10-28 23:55:04,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:04,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166056952] [2021-10-28 23:55:04,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:04,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:04,733 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:04,738 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:04,813 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:04,813 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:04,813 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:04,813 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:04,813 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:55:04,813 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:04,813 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:04,813 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:04,814 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-10-28 23:55:04,814 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:04,814 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:04,815 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,819 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,828 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:04,954 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:04,954 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:55:04,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:04,964 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:04,966 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:04,966 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:04,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Waiting until timeout for monitored process [2021-10-28 23:55:04,980 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:55:04,980 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~up~0=1} Honda state: {ULTIMATE.start_main_~up~0=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:55:05,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (68)] Ended with exit code 0 [2021-10-28 23:55:05,006 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,007 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Waiting until timeout for monitored process [2021-10-28 23:55:05,009 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:05,009 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:05,025 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:55:05,025 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:55:05,051 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (69)] Ended with exit code 0 [2021-10-28 23:55:05,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,052 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Waiting until timeout for monitored process [2021-10-28 23:55:05,061 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:05,061 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:05,077 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-28 23:55:05,077 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-28 23:55:05,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (70)] Ended with exit code 0 [2021-10-28 23:55:05,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,105 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Waiting until timeout for monitored process [2021-10-28 23:55:05,107 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:05,107 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:05,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (71)] Ended with exit code 0 [2021-10-28 23:55:05,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,165 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Waiting until timeout for monitored process [2021-10-28 23:55:05,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:55:05,168 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:05,507 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:55:05,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (72)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:05,511 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:05,511 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:05,511 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:05,511 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:05,512 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:55:05,512 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,512 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:05,512 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:05,512 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration8_Loop [2021-10-28 23:55:05,512 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:05,512 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:05,513 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:05,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:05,527 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:05,530 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:05,661 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:05,661 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:55:05,661 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,663 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,666 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:05,677 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:05,678 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:05,678 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:05,678 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:05,680 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:55:05,680 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:55:05,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Waiting until timeout for monitored process [2021-10-28 23:55:05,697 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:05,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (73)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:05,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,741 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,746 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:05,758 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:05,758 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:05,759 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:05,759 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:05,759 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:05,760 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:55:05,760 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:05,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Waiting until timeout for monitored process [2021-10-28 23:55:05,781 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:05,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (74)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:05,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,826 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,830 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:05,842 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:05,842 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:05,842 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:05,843 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:05,844 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-28 23:55:05,845 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-28 23:55:05,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Waiting until timeout for monitored process [2021-10-28 23:55:05,865 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-28 23:55:05,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (75)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:05,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,909 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,914 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:05,926 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:05,926 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:05,927 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:05,927 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-28 23:55:05,927 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:05,929 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-28 23:55:05,929 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:05,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Waiting until timeout for monitored process [2021-10-28 23:55:05,949 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:55:05,956 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2021-10-28 23:55:05,956 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:55:05,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:05,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:05,959 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:05,960 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:55:05,960 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:55:05,961 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:55:05,961 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0, ULTIMATE.start_main_~range~0) = -1*ULTIMATE.start_main_~i~0 + 1*ULTIMATE.start_main_~range~0 Supporting invariants [] [2021-10-28 23:55:05,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Waiting until timeout for monitored process [2021-10-28 23:55:05,995 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (76)] Ended with exit code 0 [2021-10-28 23:55:05,996 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:55:06,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:55:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:06,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:06,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (66)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:06,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (77)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:06,178 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:55:06,178 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26 Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,222 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 95 states and 121 transitions. Complement of second has 7 states. [2021-10-28 23:55:06,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:55:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 22 transitions. [2021-10-28 23:55:06,225 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 22 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 23:55:06,225 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:06,225 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:55:06,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:06,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:55:06,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:06,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:06,361 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:55:06,361 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26 Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,431 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 124 states and 157 transitions. Complement of second has 9 states. [2021-10-28 23:55:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-10-28 23:55:06,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 29 transitions. [2021-10-28 23:55:06,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 29 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 23:55:06,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:06,433 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-28 23:55:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:06,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:55:06,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:06,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:06,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:06,554 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:55:06,554 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26 Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,604 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 71 states and 92 transitions. cyclomatic complexity: 26. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 112 states and 146 transitions. Complement of second has 8 states. [2021-10-28 23:55:06,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:55:06,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 26 transitions. [2021-10-28 23:55:06,605 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 10 letters. Loop has 6 letters. [2021-10-28 23:55:06,606 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:06,606 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 16 letters. Loop has 6 letters. [2021-10-28 23:55:06,607 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:06,607 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 26 transitions. Stem has 10 letters. Loop has 12 letters. [2021-10-28 23:55:06,609 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:06,609 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 112 states and 146 transitions. [2021-10-28 23:55:06,611 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 35 [2021-10-28 23:55:06,612 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 112 states to 84 states and 108 transitions. [2021-10-28 23:55:06,612 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 33 [2021-10-28 23:55:06,612 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 39 [2021-10-28 23:55:06,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 108 transitions. [2021-10-28 23:55:06,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:06,613 INFO L681 BuchiCegarLoop]: Abstraction has 84 states and 108 transitions. [2021-10-28 23:55:06,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states and 108 transitions. [2021-10-28 23:55:06,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2021-10-28 23:55:06,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 48 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2021-10-28 23:55:06,617 INFO L704 BuchiCegarLoop]: Abstraction has 49 states and 66 transitions. [2021-10-28 23:55:06,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:06,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:55:06,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:06,626 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:06,678 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2021-10-28 23:55:06,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:55:06,679 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 119 states and 154 transitions. [2021-10-28 23:55:06,683 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2021-10-28 23:55:06,685 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 119 states to 117 states and 152 transitions. [2021-10-28 23:55:06,685 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-10-28 23:55:06,685 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-10-28 23:55:06,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 152 transitions. [2021-10-28 23:55:06,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:06,686 INFO L681 BuchiCegarLoop]: Abstraction has 117 states and 152 transitions. [2021-10-28 23:55:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states and 152 transitions. [2021-10-28 23:55:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 97. [2021-10-28 23:55:06,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 97 states have (on average 1.3195876288659794) internal successors, (128), 96 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 128 transitions. [2021-10-28 23:55:06,702 INFO L704 BuchiCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-10-28 23:55:06,702 INFO L587 BuchiCegarLoop]: Abstraction has 97 states and 128 transitions. [2021-10-28 23:55:06,702 INFO L425 BuchiCegarLoop]: ======== Iteration 9============ [2021-10-28 23:55:06,702 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 128 transitions. [2021-10-28 23:55:06,703 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 59 [2021-10-28 23:55:06,704 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:06,704 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:06,705 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-10-28 23:55:06,705 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2021-10-28 23:55:06,705 INFO L791 eck$LassoCheckResult]: Stem: 1801#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 1802#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1804#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1821#L14-2 assume !(main_~i~0 == main_~range~0); 1822#L17-1 [2021-10-28 23:55:06,706 INFO L793 eck$LassoCheckResult]: Loop: 1822#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 1853#L20-1 assume !(0 == main_~up~0); 1854#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1869#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1846#L14 assume !(0 == main_~i~0); 1845#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 1839#L17-1 assume !(1 == main_~up~0); 1844#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1842#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1843#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1882#L14 assume !(0 == main_~i~0); 1838#L14-2 assume !(main_~i~0 == main_~range~0); 1837#L17-1 assume !(1 == main_~up~0); 1836#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 1834#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 1835#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 1840#L14 assume 0 == main_~i~0;main_~up~0 := 1; 1841#L14-2 assume !(main_~i~0 == main_~range~0); 1822#L17-1 [2021-10-28 23:55:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:06,706 INFO L85 PathProgramCache]: Analyzing trace with hash 963346, now seen corresponding path program 3 times [2021-10-28 23:55:06,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:06,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131321813] [2021-10-28 23:55:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:06,707 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:06,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:06,713 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:06,724 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1416950548, now seen corresponding path program 1 times [2021-10-28 23:55:06,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:06,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255775167] [2021-10-28 23:55:06,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:06,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:06,945 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:06,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:06,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255775167] [2021-10-28 23:55:06,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255775167] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:06,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441772214] [2021-10-28 23:55:06,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:06,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:06,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:06,948 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:06,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-28 23:55:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:07,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:55:07,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:07,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441772214] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:07,231 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:07,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 11 [2021-10-28 23:55:07,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096594718] [2021-10-28 23:55:07,233 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-10-28 23:55:07,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:07,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-28 23:55:07,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-28 23:55:07,234 INFO L87 Difference]: Start difference. First operand 97 states and 128 transitions. cyclomatic complexity: 35 Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:07,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:07,531 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2021-10-28 23:55:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-28 23:55:07,532 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 100 states and 111 transitions. [2021-10-28 23:55:07,533 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 23:55:07,534 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 100 states to 93 states and 104 transitions. [2021-10-28 23:55:07,534 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 45 [2021-10-28 23:55:07,534 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 61 [2021-10-28 23:55:07,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 93 states and 104 transitions. [2021-10-28 23:55:07,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:07,535 INFO L681 BuchiCegarLoop]: Abstraction has 93 states and 104 transitions. [2021-10-28 23:55:07,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states and 104 transitions. [2021-10-28 23:55:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 84. [2021-10-28 23:55:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 84 states have (on average 1.130952380952381) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2021-10-28 23:55:07,544 INFO L704 BuchiCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-10-28 23:55:07,544 INFO L587 BuchiCegarLoop]: Abstraction has 84 states and 95 transitions. [2021-10-28 23:55:07,544 INFO L425 BuchiCegarLoop]: ======== Iteration 10============ [2021-10-28 23:55:07,544 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 84 states and 95 transitions. [2021-10-28 23:55:07,545 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 23:55:07,547 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:07,547 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:07,548 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-28 23:55:07,549 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:07,549 INFO L791 eck$LassoCheckResult]: Stem: 2072#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2073#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2093#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2092#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2086#L17-1 assume !(1 == main_~up~0); 2080#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2081#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2083#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2132#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2121#L14-2 [2021-10-28 23:55:07,549 INFO L793 eck$LassoCheckResult]: Loop: 2121#L14-2 assume !(main_~i~0 == main_~range~0); 2120#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2119#L20-1 assume !(0 == main_~up~0); 2118#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2117#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2116#L14 assume !(0 == main_~i~0); 2111#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2115#L17-1 assume !(1 == main_~up~0); 2146#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2144#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2142#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2141#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2121#L14-2 [2021-10-28 23:55:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1761729718, now seen corresponding path program 1 times [2021-10-28 23:55:07,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:07,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226882182] [2021-10-28 23:55:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:07,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:07,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:07,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226882182] [2021-10-28 23:55:07,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226882182] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:07,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:07,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 23:55:07,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789139352] [2021-10-28 23:55:07,595 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:07,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:07,596 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 2 times [2021-10-28 23:55:07,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:07,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660157286] [2021-10-28 23:55:07,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:07,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:07,611 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:07,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:07,617 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:07,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:07,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 23:55:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 23:55:07,718 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. cyclomatic complexity: 16 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:07,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:07,753 INFO L93 Difference]: Finished difference Result 84 states and 94 transitions. [2021-10-28 23:55:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 23:55:07,754 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 84 states and 94 transitions. [2021-10-28 23:55:07,755 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 23:55:07,756 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 84 states to 83 states and 93 transitions. [2021-10-28 23:55:07,756 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 56 [2021-10-28 23:55:07,756 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 56 [2021-10-28 23:55:07,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 93 transitions. [2021-10-28 23:55:07,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:07,757 INFO L681 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-28 23:55:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states and 93 transitions. [2021-10-28 23:55:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-28 23:55:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2021-10-28 23:55:07,760 INFO L704 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-28 23:55:07,760 INFO L587 BuchiCegarLoop]: Abstraction has 83 states and 93 transitions. [2021-10-28 23:55:07,761 INFO L425 BuchiCegarLoop]: ======== Iteration 11============ [2021-10-28 23:55:07,761 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 83 states and 93 transitions. [2021-10-28 23:55:07,762 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 28 [2021-10-28 23:55:07,762 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:07,762 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:07,763 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:07,763 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:07,764 INFO L791 eck$LassoCheckResult]: Stem: 2249#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2250#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2267#L14 assume !(0 == main_~i~0); 2275#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2263#L17-1 assume !(1 == main_~up~0); 2257#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2258#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2259#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2331#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2317#L14-2 [2021-10-28 23:55:07,765 INFO L793 eck$LassoCheckResult]: Loop: 2317#L14-2 assume !(main_~i~0 == main_~range~0); 2330#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2329#L20-1 assume !(0 == main_~up~0); 2328#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2327#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2326#L14 assume !(0 == main_~i~0); 2285#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2325#L17-1 assume !(1 == main_~up~0); 2323#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2321#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2319#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2316#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2317#L14-2 [2021-10-28 23:55:07,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:07,766 INFO L85 PathProgramCache]: Analyzing trace with hash -758230216, now seen corresponding path program 1 times [2021-10-28 23:55:07,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:07,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867029983] [2021-10-28 23:55:07,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:07,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:07,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:07,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:07,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867029983] [2021-10-28 23:55:07,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867029983] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:07,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978239912] [2021-10-28 23:55:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:07,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:07,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:07,822 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:07,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-28 23:55:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:07,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:55:07,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:07,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978239912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:07,961 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:07,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 23:55:07,961 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916057228] [2021-10-28 23:55:07,962 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:07,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:07,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 3 times [2021-10-28 23:55:07,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:07,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403781985] [2021-10-28 23:55:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:07,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:07,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:07,974 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:07,984 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:08,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:08,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:55:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:55:08,067 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. cyclomatic complexity: 15 Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:08,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:08,125 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2021-10-28 23:55:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:55:08,126 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 77 states and 85 transitions. [2021-10-28 23:55:08,128 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:08,128 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 77 states to 75 states and 83 transitions. [2021-10-28 23:55:08,129 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 48 [2021-10-28 23:55:08,129 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 48 [2021-10-28 23:55:08,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 83 transitions. [2021-10-28 23:55:08,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:08,130 INFO L681 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-28 23:55:08,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states and 83 transitions. [2021-10-28 23:55:08,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-28 23:55:08,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2021-10-28 23:55:08,133 INFO L704 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-28 23:55:08,133 INFO L587 BuchiCegarLoop]: Abstraction has 75 states and 83 transitions. [2021-10-28 23:55:08,133 INFO L425 BuchiCegarLoop]: ======== Iteration 12============ [2021-10-28 23:55:08,133 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 75 states and 83 transitions. [2021-10-28 23:55:08,135 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:08,135 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:08,135 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:08,137 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1] [2021-10-28 23:55:08,137 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:08,137 INFO L791 eck$LassoCheckResult]: Stem: 2445#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2446#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2463#L14 assume !(0 == main_~i~0); 2471#L14-2 assume !(main_~i~0 == main_~range~0); 2470#L17-1 assume !(1 == main_~up~0); 2469#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2466#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2449#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2450#L14 assume !(0 == main_~i~0); 2460#L14-2 assume !(main_~i~0 == main_~range~0); 2462#L17-1 assume !(1 == main_~up~0); 2495#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2491#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2492#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2485#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2486#L14-2 [2021-10-28 23:55:08,137 INFO L793 eck$LassoCheckResult]: Loop: 2486#L14-2 assume !(main_~i~0 == main_~range~0); 2506#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2505#L20-1 assume !(0 == main_~up~0); 2504#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2503#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2501#L14 assume !(0 == main_~i~0); 2499#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2497#L17-1 assume !(1 == main_~up~0); 2496#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2493#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2488#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2489#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2486#L14-2 [2021-10-28 23:55:08,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:08,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1377251387, now seen corresponding path program 2 times [2021-10-28 23:55:08,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:08,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893467675] [2021-10-28 23:55:08,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:08,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:08,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:08,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:08,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893467675] [2021-10-28 23:55:08,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893467675] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:08,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512886706] [2021-10-28 23:55:08,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:08,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:08,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:08,204 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:08,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-28 23:55:08,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:08,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:08,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-28 23:55:08,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:08,354 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:08,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512886706] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:08,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:08,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-28 23:55:08,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44714794] [2021-10-28 23:55:08,355 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:08,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:08,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 4 times [2021-10-28 23:55:08,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:08,356 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61112535] [2021-10-28 23:55:08,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:08,356 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:08,359 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:08,363 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:08,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:55:08,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:55:08,431 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. cyclomatic complexity: 12 Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:08,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:08,502 INFO L93 Difference]: Finished difference Result 99 states and 107 transitions. [2021-10-28 23:55:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 23:55:08,503 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 99 states and 107 transitions. [2021-10-28 23:55:08,505 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:08,506 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 99 states to 97 states and 105 transitions. [2021-10-28 23:55:08,506 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 59 [2021-10-28 23:55:08,507 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 59 [2021-10-28 23:55:08,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 97 states and 105 transitions. [2021-10-28 23:55:08,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:08,507 INFO L681 BuchiCegarLoop]: Abstraction has 97 states and 105 transitions. [2021-10-28 23:55:08,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states and 105 transitions. [2021-10-28 23:55:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2021-10-28 23:55:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 95 transitions. [2021-10-28 23:55:08,511 INFO L704 BuchiCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-28 23:55:08,511 INFO L587 BuchiCegarLoop]: Abstraction has 87 states and 95 transitions. [2021-10-28 23:55:08,511 INFO L425 BuchiCegarLoop]: ======== Iteration 13============ [2021-10-28 23:55:08,511 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 87 states and 95 transitions. [2021-10-28 23:55:08,512 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:08,513 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:08,513 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:08,514 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [4, 3, 3, 3, 3, 3, 1, 1] [2021-10-28 23:55:08,514 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:08,514 INFO L791 eck$LassoCheckResult]: Stem: 2673#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2674#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2712#L14 assume !(0 == main_~i~0); 2710#L14-2 assume !(main_~i~0 == main_~range~0); 2709#L17-1 assume !(1 == main_~up~0); 2708#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2705#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2706#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2690#L14 assume !(0 == main_~i~0); 2691#L14-2 assume !(main_~i~0 == main_~range~0); 2741#L17-1 assume !(1 == main_~up~0); 2681#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2682#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2677#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2678#L14 assume !(0 == main_~i~0); 2692#L14-2 assume !(main_~i~0 == main_~range~0); 2685#L17-1 assume !(1 == main_~up~0); 2686#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2727#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2728#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2721#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2722#L14-2 [2021-10-28 23:55:08,515 INFO L793 eck$LassoCheckResult]: Loop: 2722#L14-2 assume !(main_~i~0 == main_~range~0); 2717#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 2718#L20-1 assume !(0 == main_~up~0); 2736#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2735#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2734#L14 assume !(0 == main_~i~0); 2733#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 2732#L17-1 assume !(1 == main_~up~0); 2731#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 2729#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 2724#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2725#L14 assume 0 == main_~i~0;main_~up~0 := 1; 2722#L14-2 [2021-10-28 23:55:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:08,515 INFO L85 PathProgramCache]: Analyzing trace with hash 237666774, now seen corresponding path program 3 times [2021-10-28 23:55:08,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:08,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562305308] [2021-10-28 23:55:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:08,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:08,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:08,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:08,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562305308] [2021-10-28 23:55:08,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562305308] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:08,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940600956] [2021-10-28 23:55:08,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:08,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:08,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:08,574 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:08,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-28 23:55:08,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 23:55:08,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:08,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:08,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:08,753 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:08,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940600956] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:08,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:08,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-10-28 23:55:08,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011033011] [2021-10-28 23:55:08,755 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 5 times [2021-10-28 23:55:08,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:08,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546176783] [2021-10-28 23:55:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:08,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:08,765 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:08,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:08,778 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:08,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-28 23:55:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 23:55:08,850 INFO L87 Difference]: Start difference. First operand 87 states and 95 transitions. cyclomatic complexity: 12 Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:09,036 INFO L93 Difference]: Finished difference Result 131 states and 139 transitions. [2021-10-28 23:55:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:55:09,037 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 131 states and 139 transitions. [2021-10-28 23:55:09,040 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:09,043 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 131 states to 127 states and 135 transitions. [2021-10-28 23:55:09,043 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 77 [2021-10-28 23:55:09,043 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 77 [2021-10-28 23:55:09,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 127 states and 135 transitions. [2021-10-28 23:55:09,044 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:09,044 INFO L681 BuchiCegarLoop]: Abstraction has 127 states and 135 transitions. [2021-10-28 23:55:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states and 135 transitions. [2021-10-28 23:55:09,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2021-10-28 23:55:09,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:09,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 119 transitions. [2021-10-28 23:55:09,048 INFO L704 BuchiCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-10-28 23:55:09,049 INFO L587 BuchiCegarLoop]: Abstraction has 111 states and 119 transitions. [2021-10-28 23:55:09,049 INFO L425 BuchiCegarLoop]: ======== Iteration 14============ [2021-10-28 23:55:09,049 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 111 states and 119 transitions. [2021-10-28 23:55:09,050 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:09,051 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:09,051 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:09,052 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [6, 5, 5, 5, 5, 5, 1, 1] [2021-10-28 23:55:09,052 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:09,053 INFO L791 eck$LassoCheckResult]: Stem: 2978#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 2979#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3014#L14 assume !(0 == main_~i~0); 3012#L14-2 assume !(main_~i~0 == main_~range~0); 3011#L17-1 assume !(1 == main_~up~0); 3010#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3008#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 2982#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 2983#L14 assume !(0 == main_~i~0); 2995#L14-2 assume !(main_~i~0 == main_~range~0); 2990#L17-1 assume !(1 == main_~up~0); 2991#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3016#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3072#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3071#L14 assume !(0 == main_~i~0); 3070#L14-2 assume !(main_~i~0 == main_~range~0); 3069#L17-1 assume !(1 == main_~up~0); 3068#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3067#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3066#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3065#L14 assume !(0 == main_~i~0); 3064#L14-2 assume !(main_~i~0 == main_~range~0); 3063#L17-1 assume !(1 == main_~up~0); 3062#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3061#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3030#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3058#L14 assume !(0 == main_~i~0); 3044#L14-2 assume !(main_~i~0 == main_~range~0); 3042#L17-1 assume !(1 == main_~up~0); 3034#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3029#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3031#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3023#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3024#L14-2 [2021-10-28 23:55:09,053 INFO L793 eck$LassoCheckResult]: Loop: 3024#L14-2 assume !(main_~i~0 == main_~range~0); 3019#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3020#L20-1 assume !(0 == main_~up~0); 3040#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3039#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3038#L14 assume !(0 == main_~i~0); 3037#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 3036#L17-1 assume !(1 == main_~up~0); 3035#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3032#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3026#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3027#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3024#L14-2 [2021-10-28 23:55:09,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash 170050488, now seen corresponding path program 4 times [2021-10-28 23:55:09,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:09,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21959572] [2021-10-28 23:55:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:09,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:09,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:09,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:09,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21959572] [2021-10-28 23:55:09,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21959572] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:09,166 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714141357] [2021-10-28 23:55:09,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:55:09,166 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:09,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:09,168 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:09,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-28 23:55:09,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:55:09,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:09,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 23:55:09,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:09,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714141357] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:09,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:09,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-28 23:55:09,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086042045] [2021-10-28 23:55:09,464 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:09,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 6 times [2021-10-28 23:55:09,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:09,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057170600] [2021-10-28 23:55:09,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:09,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:09,471 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:09,475 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:09,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:09,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-28 23:55:09,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-28 23:55:09,552 INFO L87 Difference]: Start difference. First operand 111 states and 119 transitions. cyclomatic complexity: 12 Second operand has 10 states, 9 states have (on average 5.111111111111111) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:09,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:09,706 INFO L93 Difference]: Finished difference Result 167 states and 175 transitions. [2021-10-28 23:55:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-28 23:55:09,706 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 167 states and 175 transitions. [2021-10-28 23:55:09,708 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:09,710 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 167 states to 163 states and 171 transitions. [2021-10-28 23:55:09,710 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 101 [2021-10-28 23:55:09,711 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 101 [2021-10-28 23:55:09,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 163 states and 171 transitions. [2021-10-28 23:55:09,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:09,711 INFO L681 BuchiCegarLoop]: Abstraction has 163 states and 171 transitions. [2021-10-28 23:55:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states and 171 transitions. [2021-10-28 23:55:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 135. [2021-10-28 23:55:09,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 135 states have (on average 1.0592592592592593) internal successors, (143), 134 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 143 transitions. [2021-10-28 23:55:09,715 INFO L704 BuchiCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-10-28 23:55:09,715 INFO L587 BuchiCegarLoop]: Abstraction has 135 states and 143 transitions. [2021-10-28 23:55:09,715 INFO L425 BuchiCegarLoop]: ======== Iteration 15============ [2021-10-28 23:55:09,715 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 135 states and 143 transitions. [2021-10-28 23:55:09,717 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:09,717 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:09,717 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:09,719 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [8, 7, 7, 7, 7, 7, 1, 1] [2021-10-28 23:55:09,719 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:09,720 INFO L791 eck$LassoCheckResult]: Stem: 3377#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 3378#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3413#L14 assume !(0 == main_~i~0); 3411#L14-2 assume !(main_~i~0 == main_~range~0); 3410#L17-1 assume !(1 == main_~up~0); 3409#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3406#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3407#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3392#L14 assume !(0 == main_~i~0); 3393#L14-2 assume !(main_~i~0 == main_~range~0); 3388#L17-1 assume !(1 == main_~up~0); 3389#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3415#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3476#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3475#L14 assume !(0 == main_~i~0); 3474#L14-2 assume !(main_~i~0 == main_~range~0); 3473#L17-1 assume !(1 == main_~up~0); 3472#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3471#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3470#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3469#L14 assume !(0 == main_~i~0); 3468#L14-2 assume !(main_~i~0 == main_~range~0); 3467#L17-1 assume !(1 == main_~up~0); 3466#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3465#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3464#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3463#L14 assume !(0 == main_~i~0); 3462#L14-2 assume !(main_~i~0 == main_~range~0); 3461#L17-1 assume !(1 == main_~up~0); 3460#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3459#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3458#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3457#L14 assume !(0 == main_~i~0); 3456#L14-2 assume !(main_~i~0 == main_~range~0); 3455#L17-1 assume !(1 == main_~up~0); 3454#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3453#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3428#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3444#L14 assume !(0 == main_~i~0); 3442#L14-2 assume !(main_~i~0 == main_~range~0); 3440#L17-1 assume !(1 == main_~up~0); 3432#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3427#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3429#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3422#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3423#L14-2 [2021-10-28 23:55:09,720 INFO L793 eck$LassoCheckResult]: Loop: 3423#L14-2 assume !(main_~i~0 == main_~range~0); 3418#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3419#L20-1 assume !(0 == main_~up~0); 3439#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3438#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3437#L14 assume !(0 == main_~i~0); 3436#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 3435#L17-1 assume !(1 == main_~up~0); 3434#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3431#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3425#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3426#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3423#L14-2 [2021-10-28 23:55:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:09,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1502788966, now seen corresponding path program 5 times [2021-10-28 23:55:09,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:09,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975777713] [2021-10-28 23:55:09,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:09,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:09,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:09,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975777713] [2021-10-28 23:55:09,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975777713] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:09,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846479150] [2021-10-28 23:55:09,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-28 23:55:09,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:09,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:09,846 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:09,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-28 23:55:09,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-10-28 23:55:09,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:09,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-28 23:55:09,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:10,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846479150] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:10,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:10,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-10-28 23:55:10,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029302711] [2021-10-28 23:55:10,191 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:10,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 7 times [2021-10-28 23:55:10,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:10,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742126991] [2021-10-28 23:55:10,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:10,192 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:10,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:10,198 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:10,202 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:10,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-28 23:55:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-10-28 23:55:10,275 INFO L87 Difference]: Start difference. First operand 135 states and 143 transitions. cyclomatic complexity: 12 Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:10,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:10,469 INFO L93 Difference]: Finished difference Result 203 states and 211 transitions. [2021-10-28 23:55:10,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 23:55:10,470 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 203 states and 211 transitions. [2021-10-28 23:55:10,472 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:10,475 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 203 states to 199 states and 207 transitions. [2021-10-28 23:55:10,475 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 125 [2021-10-28 23:55:10,475 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 125 [2021-10-28 23:55:10,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 199 states and 207 transitions. [2021-10-28 23:55:10,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:10,476 INFO L681 BuchiCegarLoop]: Abstraction has 199 states and 207 transitions. [2021-10-28 23:55:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states and 207 transitions. [2021-10-28 23:55:10,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 159. [2021-10-28 23:55:10,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 159 states have (on average 1.050314465408805) internal successors, (167), 158 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:10,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2021-10-28 23:55:10,481 INFO L704 BuchiCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-10-28 23:55:10,482 INFO L587 BuchiCegarLoop]: Abstraction has 159 states and 167 transitions. [2021-10-28 23:55:10,482 INFO L425 BuchiCegarLoop]: ======== Iteration 16============ [2021-10-28 23:55:10,482 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 159 states and 167 transitions. [2021-10-28 23:55:10,484 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:10,484 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:10,484 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:10,488 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [10, 9, 9, 9, 9, 9, 1, 1] [2021-10-28 23:55:10,488 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:10,489 INFO L791 eck$LassoCheckResult]: Stem: 3879#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 3880#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3915#L14 assume !(0 == main_~i~0); 3913#L14-2 assume !(main_~i~0 == main_~range~0); 3912#L17-1 assume !(1 == main_~up~0); 3911#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3909#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3883#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3884#L14 assume !(0 == main_~i~0); 3896#L14-2 assume !(main_~i~0 == main_~range~0); 3891#L17-1 assume !(1 == main_~up~0); 3892#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3917#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3997#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3996#L14 assume !(0 == main_~i~0); 3995#L14-2 assume !(main_~i~0 == main_~range~0); 3994#L17-1 assume !(1 == main_~up~0); 3993#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3992#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3991#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3990#L14 assume !(0 == main_~i~0); 3989#L14-2 assume !(main_~i~0 == main_~range~0); 3988#L17-1 assume !(1 == main_~up~0); 3987#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3986#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3985#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3984#L14 assume !(0 == main_~i~0); 3983#L14-2 assume !(main_~i~0 == main_~range~0); 3982#L17-1 assume !(1 == main_~up~0); 3981#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3980#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3979#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3978#L14 assume !(0 == main_~i~0); 3977#L14-2 assume !(main_~i~0 == main_~range~0); 3976#L17-1 assume !(1 == main_~up~0); 3975#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3974#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3973#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3972#L14 assume !(0 == main_~i~0); 3971#L14-2 assume !(main_~i~0 == main_~range~0); 3970#L17-1 assume !(1 == main_~up~0); 3969#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3968#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3967#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3966#L14 assume !(0 == main_~i~0); 3965#L14-2 assume !(main_~i~0 == main_~range~0); 3964#L17-1 assume !(1 == main_~up~0); 3963#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3962#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3931#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3959#L14 assume !(0 == main_~i~0); 3945#L14-2 assume !(main_~i~0 == main_~range~0); 3943#L17-1 assume !(1 == main_~up~0); 3935#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3930#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 3932#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3924#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3925#L14-2 [2021-10-28 23:55:10,489 INFO L793 eck$LassoCheckResult]: Loop: 3925#L14-2 assume !(main_~i~0 == main_~range~0); 3920#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 3921#L20-1 assume !(0 == main_~up~0); 3941#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3940#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3939#L14 assume !(0 == main_~i~0); 3938#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 3937#L17-1 assume !(1 == main_~up~0); 3936#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 3933#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 3927#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 3928#L14 assume 0 == main_~i~0;main_~up~0 := 1; 3925#L14-2 [2021-10-28 23:55:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:10,489 INFO L85 PathProgramCache]: Analyzing trace with hash 815169148, now seen corresponding path program 6 times [2021-10-28 23:55:10,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:10,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345978338] [2021-10-28 23:55:10,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:10,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:10,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:10,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:10,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345978338] [2021-10-28 23:55:10,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345978338] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:10,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271996120] [2021-10-28 23:55:10,653 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-28 23:55:10,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:10,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:10,661 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:10,681 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-28 23:55:10,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-10-28 23:55:10,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:10,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-28 23:55:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:11,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271996120] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:11,080 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:11,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-10-28 23:55:11,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627906701] [2021-10-28 23:55:11,081 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:11,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:11,082 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 8 times [2021-10-28 23:55:11,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:11,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518788333] [2021-10-28 23:55:11,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:11,083 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:11,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:11,092 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:11,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:11,100 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:11,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:11,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-28 23:55:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-10-28 23:55:11,176 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. cyclomatic complexity: 12 Second operand has 15 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:11,410 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2021-10-28 23:55:11,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:55:11,411 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 201 states and 209 transitions. [2021-10-28 23:55:11,413 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:11,416 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 201 states to 197 states and 205 transitions. [2021-10-28 23:55:11,416 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 111 [2021-10-28 23:55:11,416 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 111 [2021-10-28 23:55:11,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 197 states and 205 transitions. [2021-10-28 23:55:11,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:11,416 INFO L681 BuchiCegarLoop]: Abstraction has 197 states and 205 transitions. [2021-10-28 23:55:11,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states and 205 transitions. [2021-10-28 23:55:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 183. [2021-10-28 23:55:11,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 183 states have (on average 1.0437158469945356) internal successors, (191), 182 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:11,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 191 transitions. [2021-10-28 23:55:11,424 INFO L704 BuchiCegarLoop]: Abstraction has 183 states and 191 transitions. [2021-10-28 23:55:11,425 INFO L587 BuchiCegarLoop]: Abstraction has 183 states and 191 transitions. [2021-10-28 23:55:11,425 INFO L425 BuchiCegarLoop]: ======== Iteration 17============ [2021-10-28 23:55:11,425 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 183 states and 191 transitions. [2021-10-28 23:55:11,427 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:11,427 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:11,427 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:11,432 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [12, 11, 11, 11, 11, 11, 1, 1] [2021-10-28 23:55:11,433 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:11,434 INFO L791 eck$LassoCheckResult]: Stem: 4441#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 4442#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4477#L14 assume !(0 == main_~i~0); 4475#L14-2 assume !(main_~i~0 == main_~range~0); 4474#L17-1 assume !(1 == main_~up~0); 4473#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4471#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4445#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4446#L14 assume !(0 == main_~i~0); 4457#L14-2 assume !(main_~i~0 == main_~range~0); 4452#L17-1 assume !(1 == main_~up~0); 4449#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4450#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4609#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4608#L14 assume !(0 == main_~i~0); 4607#L14-2 assume !(main_~i~0 == main_~range~0); 4606#L17-1 assume !(1 == main_~up~0); 4605#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4604#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4603#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4602#L14 assume !(0 == main_~i~0); 4601#L14-2 assume !(main_~i~0 == main_~range~0); 4600#L17-1 assume !(1 == main_~up~0); 4599#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4598#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4597#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4596#L14 assume !(0 == main_~i~0); 4595#L14-2 assume !(main_~i~0 == main_~range~0); 4594#L17-1 assume !(1 == main_~up~0); 4593#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4592#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4591#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4590#L14 assume !(0 == main_~i~0); 4589#L14-2 assume !(main_~i~0 == main_~range~0); 4588#L17-1 assume !(1 == main_~up~0); 4587#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4586#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4585#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4584#L14 assume !(0 == main_~i~0); 4583#L14-2 assume !(main_~i~0 == main_~range~0); 4582#L17-1 assume !(1 == main_~up~0); 4581#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4580#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4579#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4578#L14 assume !(0 == main_~i~0); 4577#L14-2 assume !(main_~i~0 == main_~range~0); 4576#L17-1 assume !(1 == main_~up~0); 4575#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4574#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4573#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4572#L14 assume !(0 == main_~i~0); 4571#L14-2 assume !(main_~i~0 == main_~range~0); 4570#L17-1 assume !(1 == main_~up~0); 4569#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4568#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4567#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4566#L14 assume !(0 == main_~i~0); 4565#L14-2 assume !(main_~i~0 == main_~range~0); 4564#L17-1 assume !(1 == main_~up~0); 4563#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4562#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4493#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4559#L14 assume !(0 == main_~i~0); 4507#L14-2 assume !(main_~i~0 == main_~range~0); 4505#L17-1 assume !(1 == main_~up~0); 4497#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4492#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 4494#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4486#L14 assume 0 == main_~i~0;main_~up~0 := 1; 4487#L14-2 [2021-10-28 23:55:11,434 INFO L793 eck$LassoCheckResult]: Loop: 4487#L14-2 assume !(main_~i~0 == main_~range~0); 4482#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 4483#L20-1 assume !(0 == main_~up~0); 4503#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 4502#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4501#L14 assume !(0 == main_~i~0); 4500#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 4499#L17-1 assume !(1 == main_~up~0); 4498#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 4495#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 4489#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 4490#L14 assume 0 == main_~i~0;main_~up~0 := 1; 4487#L14-2 [2021-10-28 23:55:11,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:11,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2023032994, now seen corresponding path program 7 times [2021-10-28 23:55:11,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:11,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991179112] [2021-10-28 23:55:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:11,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:11,663 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:11,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:11,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991179112] [2021-10-28 23:55:11,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991179112] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:11,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372336806] [2021-10-28 23:55:11,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-28 23:55:11,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:11,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:11,666 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:11,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-28 23:55:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:11,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-28 23:55:11,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:12,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372336806] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:12,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:12,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-10-28 23:55:12,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678925066] [2021-10-28 23:55:12,178 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 9 times [2021-10-28 23:55:12,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:12,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505838524] [2021-10-28 23:55:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:12,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:12,185 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:12,189 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:12,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:12,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 23:55:12,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-10-28 23:55:12,270 INFO L87 Difference]: Start difference. First operand 183 states and 191 transitions. cyclomatic complexity: 12 Second operand has 16 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:12,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:12,463 INFO L93 Difference]: Finished difference Result 275 states and 283 transitions. [2021-10-28 23:55:12,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-28 23:55:12,464 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 275 states and 283 transitions. [2021-10-28 23:55:12,467 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:12,470 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 275 states to 271 states and 279 transitions. [2021-10-28 23:55:12,471 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 173 [2021-10-28 23:55:12,471 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 173 [2021-10-28 23:55:12,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 271 states and 279 transitions. [2021-10-28 23:55:12,471 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:12,472 INFO L681 BuchiCegarLoop]: Abstraction has 271 states and 279 transitions. [2021-10-28 23:55:12,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states and 279 transitions. [2021-10-28 23:55:12,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 207. [2021-10-28 23:55:12,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 207 states have (on average 1.038647342995169) internal successors, (215), 206 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:12,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 215 transitions. [2021-10-28 23:55:12,479 INFO L704 BuchiCegarLoop]: Abstraction has 207 states and 215 transitions. [2021-10-28 23:55:12,479 INFO L587 BuchiCegarLoop]: Abstraction has 207 states and 215 transitions. [2021-10-28 23:55:12,479 INFO L425 BuchiCegarLoop]: ======== Iteration 18============ [2021-10-28 23:55:12,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 207 states and 215 transitions. [2021-10-28 23:55:12,481 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:12,481 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:12,482 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:12,485 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [14, 13, 13, 13, 13, 13, 1, 1] [2021-10-28 23:55:12,485 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:12,487 INFO L791 eck$LassoCheckResult]: Stem: 5134#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 5135#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5152#L14 assume !(0 == main_~i~0); 5159#L14-2 assume !(main_~i~0 == main_~range~0); 5158#L17-1 assume !(1 == main_~up~0); 5157#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5154#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5138#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5139#L14 assume !(0 == main_~i~0); 5148#L14-2 assume !(main_~i~0 == main_~range~0); 5150#L17-1 assume !(1 == main_~up~0); 5160#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5161#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5268#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5267#L14 assume !(0 == main_~i~0); 5266#L14-2 assume !(main_~i~0 == main_~range~0); 5265#L17-1 assume !(1 == main_~up~0); 5264#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5263#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5262#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5261#L14 assume !(0 == main_~i~0); 5260#L14-2 assume !(main_~i~0 == main_~range~0); 5259#L17-1 assume !(1 == main_~up~0); 5258#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5257#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5256#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5255#L14 assume !(0 == main_~i~0); 5254#L14-2 assume !(main_~i~0 == main_~range~0); 5253#L17-1 assume !(1 == main_~up~0); 5252#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5251#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5250#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5249#L14 assume !(0 == main_~i~0); 5248#L14-2 assume !(main_~i~0 == main_~range~0); 5247#L17-1 assume !(1 == main_~up~0); 5246#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5245#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5244#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5243#L14 assume !(0 == main_~i~0); 5242#L14-2 assume !(main_~i~0 == main_~range~0); 5241#L17-1 assume !(1 == main_~up~0); 5240#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5239#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5238#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5237#L14 assume !(0 == main_~i~0); 5236#L14-2 assume !(main_~i~0 == main_~range~0); 5235#L17-1 assume !(1 == main_~up~0); 5234#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5233#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5232#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5231#L14 assume !(0 == main_~i~0); 5230#L14-2 assume !(main_~i~0 == main_~range~0); 5229#L17-1 assume !(1 == main_~up~0); 5228#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5227#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5226#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5225#L14 assume !(0 == main_~i~0); 5224#L14-2 assume !(main_~i~0 == main_~range~0); 5223#L17-1 assume !(1 == main_~up~0); 5222#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5221#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5220#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5219#L14 assume !(0 == main_~i~0); 5218#L14-2 assume !(main_~i~0 == main_~range~0); 5217#L17-1 assume !(1 == main_~up~0); 5216#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5215#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5214#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5213#L14 assume !(0 == main_~i~0); 5212#L14-2 assume !(main_~i~0 == main_~range~0); 5211#L17-1 assume !(1 == main_~up~0); 5210#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5209#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5184#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5206#L14 assume !(0 == main_~i~0); 5198#L14-2 assume !(main_~i~0 == main_~range~0); 5196#L17-1 assume !(1 == main_~up~0); 5188#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5183#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5185#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5177#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5178#L14-2 [2021-10-28 23:55:12,487 INFO L793 eck$LassoCheckResult]: Loop: 5178#L14-2 assume !(main_~i~0 == main_~range~0); 5173#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5174#L20-1 assume !(0 == main_~up~0); 5194#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5193#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5192#L14 assume !(0 == main_~i~0); 5191#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 5190#L17-1 assume !(1 == main_~up~0); 5189#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5186#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5180#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5181#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5178#L14-2 [2021-10-28 23:55:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:12,488 INFO L85 PathProgramCache]: Analyzing trace with hash 989277504, now seen corresponding path program 8 times [2021-10-28 23:55:12,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:12,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012266836] [2021-10-28 23:55:12,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:12,488 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:12,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012266836] [2021-10-28 23:55:12,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012266836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:12,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944400056] [2021-10-28 23:55:12,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 23:55:12,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:12,736 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:12,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-28 23:55:12,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 23:55:12,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:12,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-28 23:55:12,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:13,344 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:13,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944400056] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:13,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:13,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-10-28 23:55:13,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760442821] [2021-10-28 23:55:13,346 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 10 times [2021-10-28 23:55:13,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:13,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275673823] [2021-10-28 23:55:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:13,347 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:13,361 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:13,366 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:13,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:13,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-28 23:55:13,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2021-10-28 23:55:13,429 INFO L87 Difference]: Start difference. First operand 207 states and 215 transitions. cyclomatic complexity: 12 Second operand has 18 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:13,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:13,635 INFO L93 Difference]: Finished difference Result 243 states and 251 transitions. [2021-10-28 23:55:13,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-28 23:55:13,636 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 243 states and 251 transitions. [2021-10-28 23:55:13,639 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:13,641 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 243 states to 239 states and 247 transitions. [2021-10-28 23:55:13,642 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 129 [2021-10-28 23:55:13,642 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 129 [2021-10-28 23:55:13,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 239 states and 247 transitions. [2021-10-28 23:55:13,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:13,642 INFO L681 BuchiCegarLoop]: Abstraction has 239 states and 247 transitions. [2021-10-28 23:55:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states and 247 transitions. [2021-10-28 23:55:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231. [2021-10-28 23:55:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 231 states have (on average 1.0346320346320346) internal successors, (239), 230 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2021-10-28 23:55:13,650 INFO L704 BuchiCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-10-28 23:55:13,650 INFO L587 BuchiCegarLoop]: Abstraction has 231 states and 239 transitions. [2021-10-28 23:55:13,650 INFO L425 BuchiCegarLoop]: ======== Iteration 19============ [2021-10-28 23:55:13,650 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 231 states and 239 transitions. [2021-10-28 23:55:13,652 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:13,653 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:13,653 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:13,662 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [16, 15, 15, 15, 15, 15, 1, 1] [2021-10-28 23:55:13,662 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:13,663 INFO L791 eck$LassoCheckResult]: Stem: 5857#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 5858#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5894#L14 assume !(0 == main_~i~0); 5892#L14-2 assume !(main_~i~0 == main_~range~0); 5891#L17-1 assume !(1 == main_~up~0); 5890#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5888#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5861#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5862#L14 assume !(0 == main_~i~0); 5873#L14-2 assume !(main_~i~0 == main_~range~0); 5876#L17-1 assume !(1 == main_~up~0); 6085#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6084#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6083#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6082#L14 assume !(0 == main_~i~0); 6081#L14-2 assume !(main_~i~0 == main_~range~0); 6080#L17-1 assume !(1 == main_~up~0); 6079#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6078#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6077#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6076#L14 assume !(0 == main_~i~0); 6075#L14-2 assume !(main_~i~0 == main_~range~0); 6074#L17-1 assume !(1 == main_~up~0); 6073#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6072#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6071#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6070#L14 assume !(0 == main_~i~0); 6069#L14-2 assume !(main_~i~0 == main_~range~0); 6068#L17-1 assume !(1 == main_~up~0); 6067#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6066#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6065#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6064#L14 assume !(0 == main_~i~0); 6063#L14-2 assume !(main_~i~0 == main_~range~0); 6062#L17-1 assume !(1 == main_~up~0); 6061#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6060#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6059#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6058#L14 assume !(0 == main_~i~0); 6057#L14-2 assume !(main_~i~0 == main_~range~0); 6056#L17-1 assume !(1 == main_~up~0); 6055#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6054#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6053#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6052#L14 assume !(0 == main_~i~0); 6051#L14-2 assume !(main_~i~0 == main_~range~0); 6050#L17-1 assume !(1 == main_~up~0); 6049#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6048#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6047#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6046#L14 assume !(0 == main_~i~0); 6045#L14-2 assume !(main_~i~0 == main_~range~0); 6044#L17-1 assume !(1 == main_~up~0); 6043#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6042#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6041#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6040#L14 assume !(0 == main_~i~0); 6039#L14-2 assume !(main_~i~0 == main_~range~0); 6038#L17-1 assume !(1 == main_~up~0); 6037#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6036#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6035#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6034#L14 assume !(0 == main_~i~0); 6033#L14-2 assume !(main_~i~0 == main_~range~0); 6032#L17-1 assume !(1 == main_~up~0); 6031#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6030#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6029#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6028#L14 assume !(0 == main_~i~0); 6027#L14-2 assume !(main_~i~0 == main_~range~0); 6026#L17-1 assume !(1 == main_~up~0); 6025#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6024#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6023#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6022#L14 assume !(0 == main_~i~0); 6021#L14-2 assume !(main_~i~0 == main_~range~0); 6020#L17-1 assume !(1 == main_~up~0); 6019#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6018#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6017#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6016#L14 assume !(0 == main_~i~0); 6015#L14-2 assume !(main_~i~0 == main_~range~0); 6014#L17-1 assume !(1 == main_~up~0); 6013#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6012#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5908#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5924#L14 assume !(0 == main_~i~0); 5922#L14-2 assume !(main_~i~0 == main_~range~0); 5920#L17-1 assume !(1 == main_~up~0); 5912#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5907#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 5909#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5902#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5903#L14-2 [2021-10-28 23:55:13,663 INFO L793 eck$LassoCheckResult]: Loop: 5903#L14-2 assume !(main_~i~0 == main_~range~0); 5898#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 5899#L20-1 assume !(0 == main_~up~0); 5919#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5918#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5917#L14 assume !(0 == main_~i~0); 5916#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 5915#L17-1 assume !(1 == main_~up~0); 5914#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 5911#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 5905#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 5906#L14 assume 0 == main_~i~0;main_~up~0 := 1; 5903#L14-2 [2021-10-28 23:55:13,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:13,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1400397790, now seen corresponding path program 9 times [2021-10-28 23:55:13,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:13,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283908210] [2021-10-28 23:55:13,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:13,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:13,960 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:13,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:13,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283908210] [2021-10-28 23:55:13,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283908210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:13,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380743881] [2021-10-28 23:55:13,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 23:55:13,961 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:13,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:13,964 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:13,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-28 23:55:14,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-10-28 23:55:14,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:14,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-28 23:55:14,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:14,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380743881] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:14,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:14,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2021-10-28 23:55:14,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561749438] [2021-10-28 23:55:14,616 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:14,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:14,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 11 times [2021-10-28 23:55:14,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:14,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998689412] [2021-10-28 23:55:14,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:14,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:14,624 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:14,628 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:14,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:14,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-28 23:55:14,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-10-28 23:55:14,695 INFO L87 Difference]: Start difference. First operand 231 states and 239 transitions. cyclomatic complexity: 12 Second operand has 20 states, 19 states have (on average 5.578947368421052) internal successors, (106), 19 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:14,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:14,920 INFO L93 Difference]: Finished difference Result 267 states and 275 transitions. [2021-10-28 23:55:14,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-28 23:55:14,920 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 267 states and 275 transitions. [2021-10-28 23:55:14,924 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:14,927 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 267 states to 263 states and 271 transitions. [2021-10-28 23:55:14,927 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 141 [2021-10-28 23:55:14,928 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 141 [2021-10-28 23:55:14,928 INFO L73 IsDeterministic]: Start isDeterministic. Operand 263 states and 271 transitions. [2021-10-28 23:55:14,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:14,928 INFO L681 BuchiCegarLoop]: Abstraction has 263 states and 271 transitions. [2021-10-28 23:55:14,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states and 271 transitions. [2021-10-28 23:55:14,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 255. [2021-10-28 23:55:14,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 255 states have (on average 1.031372549019608) internal successors, (263), 254 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:14,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 263 transitions. [2021-10-28 23:55:14,936 INFO L704 BuchiCegarLoop]: Abstraction has 255 states and 263 transitions. [2021-10-28 23:55:14,936 INFO L587 BuchiCegarLoop]: Abstraction has 255 states and 263 transitions. [2021-10-28 23:55:14,936 INFO L425 BuchiCegarLoop]: ======== Iteration 20============ [2021-10-28 23:55:14,936 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 255 states and 263 transitions. [2021-10-28 23:55:14,938 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 16 [2021-10-28 23:55:14,939 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:14,939 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:14,940 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [18, 17, 16, 15, 15, 15, 2, 2, 2, 1, 1, 1] [2021-10-28 23:55:14,940 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2021-10-28 23:55:14,941 INFO L791 eck$LassoCheckResult]: Stem: 6666#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 6667#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6693#L14 assume 0 == main_~i~0;main_~up~0 := 1; 6691#L14-2 assume !(main_~i~0 == main_~range~0); 6689#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6686#L20-1 assume !(0 == main_~up~0); 6687#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6696#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6713#L14 assume !(0 == main_~i~0); 6709#L14-2 assume !(main_~i~0 == main_~range~0); 6710#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 6705#L20-1 assume !(0 == main_~up~0); 6706#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 6831#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6829#L14 assume !(0 == main_~i~0); 6827#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 6825#L17-1 assume !(1 == main_~up~0); 6823#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6821#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 6819#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6818#L14 assume !(0 == main_~i~0); 6817#L14-2 assume !(main_~i~0 == main_~range~0); 6816#L17-1 assume !(1 == main_~up~0); 6815#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6814#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6813#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6812#L14 assume !(0 == main_~i~0); 6811#L14-2 assume !(main_~i~0 == main_~range~0); 6810#L17-1 assume !(1 == main_~up~0); 6809#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6808#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6807#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6806#L14 assume !(0 == main_~i~0); 6805#L14-2 assume !(main_~i~0 == main_~range~0); 6804#L17-1 assume !(1 == main_~up~0); 6803#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6802#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6801#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6800#L14 assume !(0 == main_~i~0); 6799#L14-2 assume !(main_~i~0 == main_~range~0); 6798#L17-1 assume !(1 == main_~up~0); 6797#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6796#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6795#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6794#L14 assume !(0 == main_~i~0); 6793#L14-2 assume !(main_~i~0 == main_~range~0); 6792#L17-1 assume !(1 == main_~up~0); 6791#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6790#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6789#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6788#L14 assume !(0 == main_~i~0); 6787#L14-2 assume !(main_~i~0 == main_~range~0); 6786#L17-1 assume !(1 == main_~up~0); 6785#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6784#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6783#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6782#L14 assume !(0 == main_~i~0); 6781#L14-2 assume !(main_~i~0 == main_~range~0); 6780#L17-1 assume !(1 == main_~up~0); 6779#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6778#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6777#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6776#L14 assume !(0 == main_~i~0); 6775#L14-2 assume !(main_~i~0 == main_~range~0); 6774#L17-1 assume !(1 == main_~up~0); 6773#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6772#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6771#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6770#L14 assume !(0 == main_~i~0); 6769#L14-2 assume !(main_~i~0 == main_~range~0); 6768#L17-1 assume !(1 == main_~up~0); 6767#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6766#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6765#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6764#L14 assume !(0 == main_~i~0); 6763#L14-2 assume !(main_~i~0 == main_~range~0); 6762#L17-1 assume !(1 == main_~up~0); 6761#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6760#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6759#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6758#L14 assume !(0 == main_~i~0); 6757#L14-2 assume !(main_~i~0 == main_~range~0); 6756#L17-1 assume !(1 == main_~up~0); 6755#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6754#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6753#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6752#L14 assume !(0 == main_~i~0); 6751#L14-2 assume !(main_~i~0 == main_~range~0); 6750#L17-1 assume !(1 == main_~up~0); 6749#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6748#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6747#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6746#L14 assume !(0 == main_~i~0); 6745#L14-2 assume !(main_~i~0 == main_~range~0); 6744#L17-1 assume !(1 == main_~up~0); 6743#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6742#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6741#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6740#L14 assume !(0 == main_~i~0); 6739#L14-2 assume !(main_~i~0 == main_~range~0); 6738#L17-1 assume !(1 == main_~up~0); 6737#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6736#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6735#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6734#L14 assume !(0 == main_~i~0); 6732#L14-2 [2021-10-28 23:55:14,941 INFO L793 eck$LassoCheckResult]: Loop: 6732#L14-2 assume !(main_~i~0 == main_~range~0); 6730#L17-1 assume !(1 == main_~up~0); 6722#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 6719#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 6714#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 6715#L14 assume !(0 == main_~i~0); 6732#L14-2 [2021-10-28 23:55:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:14,942 INFO L85 PathProgramCache]: Analyzing trace with hash -296360126, now seen corresponding path program 1 times [2021-10-28 23:55:14,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:14,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369507791] [2021-10-28 23:55:14,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:14,943 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:14,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked. [2021-10-28 23:55:14,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:14,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369507791] [2021-10-28 23:55:14,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369507791] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 23:55:14,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 23:55:14,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 23:55:14,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855409488] [2021-10-28 23:55:14,995 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:14,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:14,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1514610322, now seen corresponding path program 1 times [2021-10-28 23:55:14,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:14,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478966778] [2021-10-28 23:55:14,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:14,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:15,002 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:15,005 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:15,059 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:15,059 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:15,059 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:15,060 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:15,060 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-28 23:55:15,060 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:15,060 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:15,060 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:15,060 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration20_Loop [2021-10-28 23:55:15,061 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:15,061 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:15,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,074 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,078 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,081 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,150 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:15,150 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-28 23:55:15,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:15,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:15,159 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:15,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Waiting until timeout for monitored process [2021-10-28 23:55:15,161 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-28 23:55:15,162 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:15,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (88)] Ended with exit code 0 [2021-10-28 23:55:15,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:15,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:15,209 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:15,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Waiting until timeout for monitored process [2021-10-28 23:55:15,210 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-28 23:55:15,210 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-28 23:55:15,354 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-28 23:55:15,357 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (89)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:15,357 INFO L210 LassoAnalysis]: Preferences: [2021-10-28 23:55:15,357 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-28 23:55:15,357 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-28 23:55:15,358 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-28 23:55:15,358 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-28 23:55:15,358 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:15,358 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-28 23:55:15,358 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-28 23:55:15,358 INFO L133 ssoRankerPreferences]: Filename of dumped script: Narrowing.c_Iteration20_Loop [2021-10-28 23:55:15,358 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-28 23:55:15,358 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-28 23:55:15,359 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,383 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,386 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-28 23:55:15,449 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-28 23:55:15,450 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-28 23:55:15,450 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:15,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:15,451 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:15,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Waiting until timeout for monitored process [2021-10-28 23:55:15,452 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-28 23:55:15,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-28 23:55:15,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-28 23:55:15,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-28 23:55:15,461 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-28 23:55:15,461 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-28 23:55:15,463 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-28 23:55:15,463 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-28 23:55:15,466 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-28 23:55:15,470 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-28 23:55:15,470 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-28 23:55:15,470 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-28 23:55:15,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:15,472 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-28 23:55:15,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Waiting until timeout for monitored process [2021-10-28 23:55:15,473 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-28 23:55:15,473 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-28 23:55:15,473 INFO L513 LassoAnalysis]: Proved termination. [2021-10-28 23:55:15,473 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~range~0) = 1*ULTIMATE.start_main_~range~0 Supporting invariants [] [2021-10-28 23:55:15,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (90)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:15,499 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-28 23:55:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:15,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 23:55:15,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:15,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (91)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:15,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:15,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 15 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 23:55:15,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:16,027 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-10-28 23:55:16,027 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 255 states and 263 transitions. cyclomatic complexity: 12 Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:16,067 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 255 states and 263 transitions. cyclomatic complexity: 12. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 508 states and 535 transitions. Complement of second has 6 states. [2021-10-28 23:55:16,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-10-28 23:55:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 25 transitions. [2021-10-28 23:55:16,068 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 105 letters. Loop has 6 letters. [2021-10-28 23:55:16,069 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:16,069 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 111 letters. Loop has 6 letters. [2021-10-28 23:55:16,069 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:16,070 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 25 transitions. Stem has 105 letters. Loop has 12 letters. [2021-10-28 23:55:16,070 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-28 23:55:16,070 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 508 states and 535 transitions. [2021-10-28 23:55:16,078 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:55:16,082 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 508 states to 294 states and 310 transitions. [2021-10-28 23:55:16,082 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2021-10-28 23:55:16,083 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2021-10-28 23:55:16,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 294 states and 310 transitions. [2021-10-28 23:55:16,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:16,086 INFO L681 BuchiCegarLoop]: Abstraction has 294 states and 310 transitions. [2021-10-28 23:55:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states and 310 transitions. [2021-10-28 23:55:16,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 283. [2021-10-28 23:55:16,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 283 states have (on average 1.0494699646643109) internal successors, (297), 282 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 297 transitions. [2021-10-28 23:55:16,094 INFO L704 BuchiCegarLoop]: Abstraction has 283 states and 297 transitions. [2021-10-28 23:55:16,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 23:55:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-28 23:55:16,095 INFO L87 Difference]: Start difference. First operand 283 states and 297 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:16,154 INFO L93 Difference]: Finished difference Result 294 states and 307 transitions. [2021-10-28 23:55:16,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 23:55:16,155 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 294 states and 307 transitions. [2021-10-28 23:55:16,159 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:55:16,166 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 294 states to 292 states and 305 transitions. [2021-10-28 23:55:16,167 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-28 23:55:16,167 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 23:55:16,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 292 states and 305 transitions. [2021-10-28 23:55:16,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:16,170 INFO L681 BuchiCegarLoop]: Abstraction has 292 states and 305 transitions. [2021-10-28 23:55:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states and 305 transitions. [2021-10-28 23:55:16,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2021-10-28 23:55:16,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 288 states have (on average 1.0451388888888888) internal successors, (301), 287 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:16,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 301 transitions. [2021-10-28 23:55:16,178 INFO L704 BuchiCegarLoop]: Abstraction has 288 states and 301 transitions. [2021-10-28 23:55:16,178 INFO L587 BuchiCegarLoop]: Abstraction has 288 states and 301 transitions. [2021-10-28 23:55:16,178 INFO L425 BuchiCegarLoop]: ======== Iteration 21============ [2021-10-28 23:55:16,178 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 288 states and 301 transitions. [2021-10-28 23:55:16,181 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:55:16,181 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:16,181 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:16,183 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [18, 17, 17, 17, 17, 17, 1, 1] [2021-10-28 23:55:16,183 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:16,183 INFO L791 eck$LassoCheckResult]: Stem: 8368#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 8369#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8407#L14 assume !(0 == main_~i~0); 8650#L14-2 assume !(main_~i~0 == main_~range~0); 8648#L17-1 assume !(1 == main_~up~0); 8515#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8516#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8511#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8510#L14 assume !(0 == main_~i~0); 8509#L14-2 assume !(main_~i~0 == main_~range~0); 8508#L17-1 assume !(1 == main_~up~0); 8507#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8506#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8505#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8504#L14 assume !(0 == main_~i~0); 8503#L14-2 assume !(main_~i~0 == main_~range~0); 8502#L17-1 assume !(1 == main_~up~0); 8501#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8500#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8499#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8498#L14 assume !(0 == main_~i~0); 8497#L14-2 assume !(main_~i~0 == main_~range~0); 8496#L17-1 assume !(1 == main_~up~0); 8495#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8494#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8493#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8492#L14 assume !(0 == main_~i~0); 8491#L14-2 assume !(main_~i~0 == main_~range~0); 8490#L17-1 assume !(1 == main_~up~0); 8489#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8488#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8487#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8486#L14 assume !(0 == main_~i~0); 8485#L14-2 assume !(main_~i~0 == main_~range~0); 8484#L17-1 assume !(1 == main_~up~0); 8483#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8482#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8481#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8480#L14 assume !(0 == main_~i~0); 8479#L14-2 assume !(main_~i~0 == main_~range~0); 8478#L17-1 assume !(1 == main_~up~0); 8477#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8476#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8475#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8474#L14 assume !(0 == main_~i~0); 8473#L14-2 assume !(main_~i~0 == main_~range~0); 8472#L17-1 assume !(1 == main_~up~0); 8471#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8470#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8469#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8468#L14 assume !(0 == main_~i~0); 8467#L14-2 assume !(main_~i~0 == main_~range~0); 8466#L17-1 assume !(1 == main_~up~0); 8465#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8464#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8463#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8462#L14 assume !(0 == main_~i~0); 8461#L14-2 assume !(main_~i~0 == main_~range~0); 8460#L17-1 assume !(1 == main_~up~0); 8459#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8458#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8457#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8456#L14 assume !(0 == main_~i~0); 8455#L14-2 assume !(main_~i~0 == main_~range~0); 8454#L17-1 assume !(1 == main_~up~0); 8453#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8452#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8451#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8450#L14 assume !(0 == main_~i~0); 8449#L14-2 assume !(main_~i~0 == main_~range~0); 8448#L17-1 assume !(1 == main_~up~0); 8447#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8446#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8445#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8444#L14 assume !(0 == main_~i~0); 8443#L14-2 assume !(main_~i~0 == main_~range~0); 8442#L17-1 assume !(1 == main_~up~0); 8441#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8440#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8439#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8438#L14 assume !(0 == main_~i~0); 8437#L14-2 assume !(main_~i~0 == main_~range~0); 8436#L17-1 assume !(1 == main_~up~0); 8435#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8434#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8433#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8432#L14 assume !(0 == main_~i~0); 8431#L14-2 assume !(main_~i~0 == main_~range~0); 8430#L17-1 assume !(1 == main_~up~0); 8429#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8428#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8427#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8426#L14 assume !(0 == main_~i~0); 8425#L14-2 assume !(main_~i~0 == main_~range~0); 8424#L17-1 assume !(1 == main_~up~0); 8423#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8422#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8412#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8420#L14 assume !(0 == main_~i~0); 8418#L14-2 assume !(main_~i~0 == main_~range~0); 8416#L17-1 assume !(1 == main_~up~0); 8414#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8411#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 8408#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8394#L14 assume 0 == main_~i~0;main_~up~0 := 1; 8392#L14-2 [2021-10-28 23:55:16,184 INFO L793 eck$LassoCheckResult]: Loop: 8392#L14-2 assume !(main_~i~0 == main_~range~0); 8389#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 8390#L20-1 assume !(0 == main_~up~0); 8401#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 8398#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8383#L14 assume !(0 == main_~i~0); 8384#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 8391#L17-1 assume !(1 == main_~up~0); 8374#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 8375#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 8378#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 8396#L14 assume 0 == main_~i~0;main_~up~0 := 1; 8392#L14-2 [2021-10-28 23:55:16,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:16,184 INFO L85 PathProgramCache]: Analyzing trace with hash 782815236, now seen corresponding path program 10 times [2021-10-28 23:55:16,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:16,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349190946] [2021-10-28 23:55:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:16,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 23:55:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:16,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 23:55:16,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349190946] [2021-10-28 23:55:16,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349190946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:16,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231368741] [2021-10-28 23:55:16,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-28 23:55:16,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 23:55:16,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-28 23:55:16,450 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 23:55:16,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-28 23:55:16,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-28 23:55:16,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 23:55:16,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-28 23:55:16,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 23:55:17,192 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 23:55:17,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231368741] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 23:55:17,194 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 23:55:17,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2021-10-28 23:55:17,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961727586] [2021-10-28 23:55:17,195 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-10-28 23:55:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 12 times [2021-10-28 23:55:17,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:17,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209454752] [2021-10-28 23:55:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:17,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,206 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,210 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:17,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 23:55:17,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-28 23:55:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2021-10-28 23:55:17,289 INFO L87 Difference]: Start difference. First operand 288 states and 301 transitions. cyclomatic complexity: 19 Second operand has 22 states, 21 states have (on average 5.619047619047619) internal successors, (118), 21 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 23:55:17,537 INFO L93 Difference]: Finished difference Result 324 states and 337 transitions. [2021-10-28 23:55:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-28 23:55:17,538 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 324 states and 337 transitions. [2021-10-28 23:55:17,541 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:55:17,544 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 324 states to 320 states and 333 transitions. [2021-10-28 23:55:17,544 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2021-10-28 23:55:17,545 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2021-10-28 23:55:17,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 320 states and 333 transitions. [2021-10-28 23:55:17,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-28 23:55:17,545 INFO L681 BuchiCegarLoop]: Abstraction has 320 states and 333 transitions. [2021-10-28 23:55:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states and 333 transitions. [2021-10-28 23:55:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 312. [2021-10-28 23:55:17,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 312 states have (on average 1.0416666666666667) internal successors, (325), 311 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 23:55:17,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 325 transitions. [2021-10-28 23:55:17,553 INFO L704 BuchiCegarLoop]: Abstraction has 312 states and 325 transitions. [2021-10-28 23:55:17,553 INFO L587 BuchiCegarLoop]: Abstraction has 312 states and 325 transitions. [2021-10-28 23:55:17,554 INFO L425 BuchiCegarLoop]: ======== Iteration 22============ [2021-10-28 23:55:17,554 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 312 states and 325 transitions. [2021-10-28 23:55:17,558 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2021-10-28 23:55:17,558 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-28 23:55:17,558 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-28 23:55:17,560 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [20, 19, 19, 19, 19, 19, 1, 1] [2021-10-28 23:55:17,560 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 23:55:17,560 INFO L791 eck$LassoCheckResult]: Stem: 9329#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0, main_~range~0, main_~up~0;havoc main_~i~0;havoc main_~range~0;havoc main_~up~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~range~0 := 20;main_~up~0 := 0; 9330#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9367#L14 assume !(0 == main_~i~0); 9383#L14-2 assume !(main_~i~0 == main_~range~0); 9382#L17-1 assume !(1 == main_~up~0); 9381#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9379#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9340#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9638#L14 assume !(0 == main_~i~0); 9637#L14-2 assume !(main_~i~0 == main_~range~0); 9636#L17-1 assume !(1 == main_~up~0); 9635#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9634#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9633#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9632#L14 assume !(0 == main_~i~0); 9631#L14-2 assume !(main_~i~0 == main_~range~0); 9630#L17-1 assume !(1 == main_~up~0); 9629#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9628#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9627#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9626#L14 assume !(0 == main_~i~0); 9625#L14-2 assume !(main_~i~0 == main_~range~0); 9624#L17-1 assume !(1 == main_~up~0); 9623#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9622#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9621#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9620#L14 assume !(0 == main_~i~0); 9619#L14-2 assume !(main_~i~0 == main_~range~0); 9618#L17-1 assume !(1 == main_~up~0); 9617#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9616#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9615#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9614#L14 assume !(0 == main_~i~0); 9613#L14-2 assume !(main_~i~0 == main_~range~0); 9612#L17-1 assume !(1 == main_~up~0); 9611#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9610#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9609#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9608#L14 assume !(0 == main_~i~0); 9607#L14-2 assume !(main_~i~0 == main_~range~0); 9606#L17-1 assume !(1 == main_~up~0); 9605#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9604#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9603#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9602#L14 assume !(0 == main_~i~0); 9601#L14-2 assume !(main_~i~0 == main_~range~0); 9600#L17-1 assume !(1 == main_~up~0); 9599#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9598#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9597#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9596#L14 assume !(0 == main_~i~0); 9595#L14-2 assume !(main_~i~0 == main_~range~0); 9594#L17-1 assume !(1 == main_~up~0); 9593#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9592#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9591#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9590#L14 assume !(0 == main_~i~0); 9589#L14-2 assume !(main_~i~0 == main_~range~0); 9588#L17-1 assume !(1 == main_~up~0); 9587#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9586#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9585#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9584#L14 assume !(0 == main_~i~0); 9583#L14-2 assume !(main_~i~0 == main_~range~0); 9582#L17-1 assume !(1 == main_~up~0); 9581#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9580#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9579#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9578#L14 assume !(0 == main_~i~0); 9577#L14-2 assume !(main_~i~0 == main_~range~0); 9576#L17-1 assume !(1 == main_~up~0); 9575#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9574#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9573#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9572#L14 assume !(0 == main_~i~0); 9571#L14-2 assume !(main_~i~0 == main_~range~0); 9570#L17-1 assume !(1 == main_~up~0); 9569#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9568#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9567#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9566#L14 assume !(0 == main_~i~0); 9565#L14-2 assume !(main_~i~0 == main_~range~0); 9564#L17-1 assume !(1 == main_~up~0); 9563#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9562#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9561#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9560#L14 assume !(0 == main_~i~0); 9559#L14-2 assume !(main_~i~0 == main_~range~0); 9558#L17-1 assume !(1 == main_~up~0); 9557#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9556#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9555#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9554#L14 assume !(0 == main_~i~0); 9553#L14-2 assume !(main_~i~0 == main_~range~0); 9552#L17-1 assume !(1 == main_~up~0); 9551#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9550#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9549#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9548#L14 assume !(0 == main_~i~0); 9547#L14-2 assume !(main_~i~0 == main_~range~0); 9546#L17-1 assume !(1 == main_~up~0); 9545#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9544#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9543#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9542#L14 assume !(0 == main_~i~0); 9541#L14-2 assume !(main_~i~0 == main_~range~0); 9540#L17-1 assume !(1 == main_~up~0); 9539#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9538#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9375#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9389#L14 assume !(0 == main_~i~0); 9387#L14-2 assume !(main_~i~0 == main_~range~0); 9385#L17-1 assume !(1 == main_~up~0); 9377#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9374#L23-1 assume main_~i~0 == main_~range~0 - 2;main_~range~0 := main_~range~0 - 1; 9371#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9354#L14 assume 0 == main_~i~0;main_~up~0 := 1; 9352#L14-2 [2021-10-28 23:55:17,561 INFO L793 eck$LassoCheckResult]: Loop: 9352#L14-2 assume !(main_~i~0 == main_~range~0); 9349#L17-1 assume 1 == main_~up~0;main_~i~0 := 1 + main_~i~0; 9350#L20-1 assume !(0 == main_~up~0); 9361#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 9358#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9344#L14 assume !(0 == main_~i~0); 9345#L14-2 assume main_~i~0 == main_~range~0;main_~up~0 := 0; 9351#L17-1 assume !(1 == main_~up~0); 9335#L20-1 assume 0 == main_~up~0;main_~i~0 := main_~i~0 - 1; 9336#L23-1 assume !(main_~i~0 == main_~range~0 - 2); 9339#L26-1 assume !!(0 <= main_~i~0 && main_~i~0 <= main_~range~0); 9356#L14 assume 0 == main_~i~0;main_~up~0 := 1; 9352#L14-2 [2021-10-28 23:55:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash 623328486, now seen corresponding path program 11 times [2021-10-28 23:55:17,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:17,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436375545] [2021-10-28 23:55:17,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:17,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,623 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,659 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:17,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:17,660 INFO L85 PathProgramCache]: Analyzing trace with hash 2022702435, now seen corresponding path program 13 times [2021-10-28 23:55:17,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:17,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946251645] [2021-10-28 23:55:17,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:17,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:17,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,668 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,672 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:17,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 23:55:17,673 INFO L85 PathProgramCache]: Analyzing trace with hash 737282760, now seen corresponding path program 2 times [2021-10-28 23:55:17,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 23:55:17,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132449365] [2021-10-28 23:55:17,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 23:55:17,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 23:55:17,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,698 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 23:55:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 23:55:17,726 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 23:55:19,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 28.10 11:55:19 BoogieIcfgContainer [2021-10-28 23:55:19,046 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-28 23:55:19,047 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 23:55:19,047 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 23:55:19,047 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 23:55:19,048 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 11:54:54" (3/4) ... [2021-10-28 23:55:19,051 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2021-10-28 23:55:19,200 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/witness.graphml [2021-10-28 23:55:19,201 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 23:55:19,203 INFO L168 Benchmark]: Toolchain (without parser) took 25347.66 ms. Allocated memory was 111.1 MB in the beginning and 195.0 MB in the end (delta: 83.9 MB). Free memory was 71.8 MB in the beginning and 62.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 93.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:55:19,203 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory is still 87.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:55:19,204 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.72 ms. Allocated memory is still 111.1 MB. Free memory was 71.6 MB in the beginning and 87.3 MB in the end (delta: -15.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-28 23:55:19,204 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.82 ms. Allocated memory is still 111.1 MB. Free memory was 86.8 MB in the beginning and 85.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 23:55:19,205 INFO L168 Benchmark]: Boogie Preprocessor took 30.58 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 84.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 23:55:19,205 INFO L168 Benchmark]: RCFGBuilder took 348.57 ms. Allocated memory is still 111.1 MB. Free memory was 84.7 MB in the beginning and 76.8 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:55:19,206 INFO L168 Benchmark]: BuchiAutomizer took 24405.00 ms. Allocated memory was 111.1 MB in the beginning and 195.0 MB in the end (delta: 83.9 MB). Free memory was 76.3 MB in the beginning and 69.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 112.7 MB. Max. memory is 16.1 GB. [2021-10-28 23:55:19,206 INFO L168 Benchmark]: Witness Printer took 154.31 ms. Allocated memory is still 195.0 MB. Free memory was 69.5 MB in the beginning and 62.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-28 23:55:19,209 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 111.1 MB. Free memory is still 87.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.72 ms. Allocated memory is still 111.1 MB. Free memory was 71.6 MB in the beginning and 87.3 MB in the end (delta: -15.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.82 ms. Allocated memory is still 111.1 MB. Free memory was 86.8 MB in the beginning and 85.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.58 ms. Allocated memory is still 111.1 MB. Free memory was 85.8 MB in the beginning and 84.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 348.57 ms. Allocated memory is still 111.1 MB. Free memory was 84.7 MB in the beginning and 76.8 MB in the end (delta: 7.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 24405.00 ms. Allocated memory was 111.1 MB in the beginning and 195.0 MB in the end (delta: 83.9 MB). Free memory was 76.3 MB in the beginning and 69.5 MB in the end (delta: 6.8 MB). Peak memory consumption was 112.7 MB. Max. memory is 16.1 GB. * Witness Printer took 154.31 ms. Allocated memory is still 195.0 MB. Free memory was 69.5 MB in the beginning and 62.9 MB in the end (delta: 6.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 24 terminating modules (19 trivial, 4 deterministic, 1 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function i and consists of 4 locations. One deterministic module has affine ranking function -1 * i and consists of 4 locations. One deterministic module has affine ranking function range + -1 * i and consists of 4 locations. One deterministic module has affine ranking function range and consists of 4 locations. One nondeterministic module has affine ranking function range + -1 * i and consists of 4 locations. 19 modules have a trivial ranking function, the largest among these consists of 22 locations. The remainder module has 312 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 24.2s and 22 iterations. TraceHistogramMax:20. Analysis of lassos took 19.2s. Construction of modules took 1.4s. Büchi inclusion checks took 3.0s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 21. Automata minimization 0.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 360 StatesRemovedByMinimization, 20 NontrivialMinimizations. Non-live state removal took 0.1s Buchi closure took 0.0s. Biggest automaton had 312 states and ocurred in iteration 21. Nontrivial modules had stage [4, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 231 SDtfs, 809 SDslu, 322 SDs, 0 SdLazy, 1595 SolverSat, 158 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time LassoAnalysisResults: nont1 unkn0 SFLI4 SFLT2 conc1 concLT1 SILN11 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital29 mio100 ax141 hnf100 lsp59 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq179 hnf96 smp71 dnf158 smp88 tf105 neg92 sie116 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 3 Time: 48ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 6 MotzkinApplications: 18 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 12 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 2.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 17]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {up=1, range=1, org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@50682d6d=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 13]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] int range; [L8] int up; [L9] i = __VERIFIER_nondet_int() [L10] range = 20 [L11] up = 0 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND FALSE !(i == range) [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND TRUE i == range-2 [L27] range = range-1 [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 Loop: [L17] COND FALSE !(i == range) [L20] COND TRUE up == 1 [L21] i = i+1 [L23] COND FALSE !(up == 0) [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND FALSE !(i == 0) [L17] COND TRUE i == range [L18] up = 0 [L20] COND FALSE !(up == 1) [L23] COND TRUE up == 0 [L24] i = i-1 [L26] COND FALSE !(i == range-2) [L13] COND TRUE 0 <= i && i <= range [L14] COND TRUE i == 0 [L15] up = 1 End of lasso representation. RESULT: Ultimate proved your program to be incorrect! [2021-10-28 23:55:19,289 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:19,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-10-28 23:55:19,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:19,890 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-10-28 23:55:20,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-28 23:55:20,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-10-28 23:55:20,491 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:20,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-10-28 23:55:20,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-10-28 23:55:21,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-10-28 23:55:21,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-28 23:55:21,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-10-28 23:55:21,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2a2a3a4f-9834-41a1-8e3d-9becd3f9fb4d/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...