./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.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_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/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_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/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_7514aecd-a7aa-4df8-8390-20090b18b56a/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 bb3f76d55016616b178303c0eddf93fcbee588d4887c9917c414ed1a56e984ba ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 00:01:15,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 00:01:15,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 00:01:15,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 00:01:15,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 00:01:15,374 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 00:01:15,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 00:01:15,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 00:01:15,381 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 00:01:15,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 00:01:15,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 00:01:15,385 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 00:01:15,386 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 00:01:15,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 00:01:15,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 00:01:15,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 00:01:15,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 00:01:15,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 00:01:15,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 00:01:15,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 00:01:15,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 00:01:15,401 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 00:01:15,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 00:01:15,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 00:01:15,408 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 00:01:15,409 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 00:01:15,409 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 00:01:15,410 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 00:01:15,411 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 00:01:15,412 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 00:01:15,413 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 00:01:15,414 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 00:01:15,415 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 00:01:15,416 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 00:01:15,417 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 00:01:15,418 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 00:01:15,418 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 00:01:15,419 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 00:01:15,419 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 00:01:15,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 00:01:15,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 00:01:15,422 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-10-29 00:01:15,449 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 00:01:15,449 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 00:01:15,449 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-29 00:01:15,450 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-29 00:01:15,451 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 00:01:15,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 00:01:15,451 INFO L138 SettingsManager]: * Use SBE=true [2021-10-29 00:01:15,452 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-10-29 00:01:15,452 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-10-29 00:01:15,452 INFO L138 SettingsManager]: * Use old map elimination=false [2021-10-29 00:01:15,452 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-10-29 00:01:15,453 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-10-29 00:01:15,453 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-10-29 00:01:15,453 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 00:01:15,453 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 00:01:15,454 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 00:01:15,454 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 00:01:15,454 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-10-29 00:01:15,454 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-10-29 00:01:15,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-10-29 00:01:15,455 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-29 00:01:15,455 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-10-29 00:01:15,455 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 00:01:15,455 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-10-29 00:01:15,456 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 00:01:15,456 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 00:01:15,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 00:01:15,456 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-29 00:01:15,457 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 00:01:15,458 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-10-29 00:01:15,458 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_7514aecd-a7aa-4df8-8390-20090b18b56a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb3f76d55016616b178303c0eddf93fcbee588d4887c9917c414ed1a56e984ba [2021-10-29 00:01:15,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 00:01:15,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 00:01:15,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 00:01:15,785 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 00:01:15,785 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 00:01:15,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2021-10-29 00:01:15,866 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/data/59298f7aa/f7aad7bdb0614391af3d1e2a8cba9aa5/FLAGeecde7b24 [2021-10-29 00:01:16,450 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 00:01:16,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2021-10-29 00:01:16,457 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/data/59298f7aa/f7aad7bdb0614391af3d1e2a8cba9aa5/FLAGeecde7b24 [2021-10-29 00:01:16,839 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/data/59298f7aa/f7aad7bdb0614391af3d1e2a8cba9aa5 [2021-10-29 00:01:16,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 00:01:16,850 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 00:01:16,855 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 00:01:16,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 00:01:16,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 00:01:16,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:01:16" (1/1) ... [2021-10-29 00:01:16,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e3cedc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:16, skipping insertion in model container [2021-10-29 00:01:16,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 12:01:16" (1/1) ... [2021-10-29 00:01:16,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 00:01:16,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 00:01:17,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:01:17,095 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 00:01:17,122 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 00:01:17,133 INFO L208 MainTranslator]: Completed translation [2021-10-29 00:01:17,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17 WrapperNode [2021-10-29 00:01:17,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 00:01:17,134 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 00:01:17,135 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 00:01:17,135 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 00:01:17,149 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,153 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,169 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 00:01:17,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 00:01:17,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 00:01:17,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 00:01:17,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,179 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,181 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,184 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,185 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,186 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 00:01:17,187 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 00:01:17,187 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 00:01:17,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 00:01:17,192 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (1/1) ... [2021-10-29 00:01:17,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:17,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:17,227 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:17,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-10-29 00:01:17,270 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 00:01:17,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 00:01:17,400 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 00:01:17,400 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-29 00:01:17,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:17 BoogieIcfgContainer [2021-10-29 00:01:17,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 00:01:17,403 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-10-29 00:01:17,403 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-10-29 00:01:17,406 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-10-29 00:01:17,407 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-29 00:01:17,407 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 29.10 12:01:16" (1/3) ... [2021-10-29 00:01:17,409 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47cd80e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.10 12:01:17, skipping insertion in model container [2021-10-29 00:01:17,409 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-29 00:01:17,409 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 12:01:17" (2/3) ... [2021-10-29 00:01:17,410 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@47cd80e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 29.10 12:01:17, skipping insertion in model container [2021-10-29 00:01:17,410 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-10-29 00:01:17,410 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:17" (3/3) ... [2021-10-29 00:01:17,411 INFO L389 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2021-10-29 00:01:17,458 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-10-29 00:01:17,458 INFO L360 BuchiCegarLoop]: Hoare is false [2021-10-29 00:01:17,458 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-10-29 00:01:17,458 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-29 00:01:17,458 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-29 00:01:17,458 INFO L364 BuchiCegarLoop]: Difference is false [2021-10-29 00:01:17,458 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-29 00:01:17,459 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-10-29 00:01:17,473 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-10-29 00:01:17,488 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:17,489 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:01:17,489 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:01:17,494 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-29 00:01:17,494 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-29 00:01:17,494 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-10-29 00:01:17,494 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) [2021-10-29 00:01:17,495 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:17,495 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:01:17,495 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:01:17,495 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-10-29 00:01:17,495 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-29 00:01:17,501 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 4#L17-2true [2021-10-29 00:01:17,501 INFO L793 eck$LassoCheckResult]: Loop: 4#L17-2true assume !!(0 != main_~x~0); 5#L17true assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 4#L17-2true [2021-10-29 00:01:17,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:17,507 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-10-29 00:01:17,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:17,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649212136] [2021-10-29 00:01:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:17,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:17,595 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:17,614 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:17,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-10-29 00:01:17,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:17,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498198094] [2021-10-29 00:01:17,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:17,619 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:17,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:17,643 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:17,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:17,653 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:17,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:17,657 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-10-29 00:01:17,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:17,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620475861] [2021-10-29 00:01:17,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:17,659 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:17,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:17,673 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:17,678 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:17,815 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:17,815 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:17,816 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:17,816 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:17,816 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:01:17,816 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:17,816 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:17,816 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:17,817 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2021-10-29 00:01:17,817 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:17,817 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:17,859 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:17,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:17,894 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:17,992 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:17,992 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:01:17,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:17,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,006 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:18,007 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:18,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-10-29 00:01:18,041 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:01:18,041 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: [] [2021-10-29 00:01:18,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:18,098 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,100 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,106 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:18,106 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:18,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-10-29 00:01:18,140 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:01:18,141 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: [] [2021-10-29 00:01:18,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:18,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-10-29 00:01:18,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:18,186 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:18,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:18,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,246 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,252 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:01:18,252 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:18,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-10-29 00:01:18,320 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:01:18,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:18,324 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:18,324 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:18,324 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:18,325 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:18,325 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:01:18,325 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,325 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:18,325 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:18,325 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2021-10-29 00:01:18,325 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:18,326 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:18,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:18,338 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:18,343 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:18,411 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:18,415 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:01:18,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,421 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-10-29 00:01:18,428 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-29 00:01:18,439 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:18,440 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:18,440 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:18,440 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:18,448 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-29 00:01:18,449 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-29 00:01:18,467 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:01:18,507 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2021-10-29 00:01:18,507 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-10-29 00:01:18,511 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 [2021-10-29 00:01:18,519 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:18,519 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:18,519 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:18,520 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:18,525 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-29 00:01:18,525 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-29 00:01:18,543 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:01:18,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:18,577 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,589 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 [2021-10-29 00:01:18,598 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:18,598 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:01:18,599 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:18,599 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:18,599 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:18,600 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:01:18,601 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:01:18,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-10-29 00:01:18,621 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:01:18,625 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-29 00:01:18,625 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-10-29 00:01:18,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:18,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,645 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:01:18,645 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:01:18,645 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:01:18,646 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2021-10-29 00:01:18,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-10-29 00:01:18,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:18,685 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:01:18,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:18,711 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 00:01:18,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:18,722 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:18,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:18,748 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-29 00:01:18,749 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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) Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:18,788 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 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). Second operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 23 states and 30 transitions. Complement of second has 6 states. [2021-10-29 00:01:18,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-29 00:01:18,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.0) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:18,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2021-10-29 00:01:18,793 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2021-10-29 00:01:18,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:18,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2021-10-29 00:01:18,794 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:18,794 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2021-10-29 00:01:18,795 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:18,796 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2021-10-29 00:01:18,799 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:18,802 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2021-10-29 00:01:18,804 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-10-29 00:01:18,804 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2021-10-29 00:01:18,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2021-10-29 00:01:18,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:01:18,805 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-29 00:01:18,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2021-10-29 00:01:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-29 00:01:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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) [2021-10-29 00:01:18,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2021-10-29 00:01:18,831 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-29 00:01:18,831 INFO L587 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2021-10-29 00:01:18,831 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-10-29 00:01:18,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2021-10-29 00:01:18,832 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:18,832 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:01:18,832 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:01:18,833 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-10-29 00:01:18,833 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-29 00:01:18,833 INFO L791 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 69#L17-2 assume !!(0 != main_~x~0); 67#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 63#L17-2 [2021-10-29 00:01:18,833 INFO L793 eck$LassoCheckResult]: Loop: 63#L17-2 assume !!(0 != main_~x~0); 64#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 63#L17-2 [2021-10-29 00:01:18,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-10-29 00:01:18,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:18,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515044316] [2021-10-29 00:01:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:18,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:18,843 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:18,848 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:18,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:18,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-10-29 00:01:18,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:18,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159144466] [2021-10-29 00:01:18,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:18,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:18,854 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:18,858 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:18,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:18,859 INFO L85 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2021-10-29 00:01:18,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:18,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103474680] [2021-10-29 00:01:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:18,860 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:18,906 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:18,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103474680] [2021-10-29 00:01:18,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103474680] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:18,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068415559] [2021-10-29 00:01:18,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:18,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-29 00:01:18,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:18,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-29 00:01:18,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-29 00:01:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:18,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:18,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:19,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068415559] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-29 00:01:19,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-29 00:01:19,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-10-29 00:01:19,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546994506] [2021-10-29 00:01:19,058 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:19,058 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:19,058 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:19,059 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:19,059 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:01:19,059 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,059 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:19,059 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:19,060 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2021-10-29 00:01:19,060 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:19,060 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:19,061 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,079 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,121 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:19,121 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:01:19,122 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,124 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-10-29 00:01:19,131 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:19,131 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:19,153 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:01:19,153 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: [] [2021-10-29 00:01:19,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,198 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,199 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,213 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:19,213 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:19,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-10-29 00:01:19,236 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:01:19,237 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: [] [2021-10-29 00:01:19,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,273 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,279 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:19,279 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:19,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-10-29 00:01:19,340 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,340 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,341 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:01:19,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:19,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-10-29 00:01:19,413 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:01:19,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,421 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:19,421 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:19,421 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:19,422 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:19,422 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:01:19,422 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,422 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:19,422 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:19,422 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2021-10-29 00:01:19,422 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:19,422 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:19,423 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,466 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:19,467 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:01:19,467 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,468 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,470 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 [2021-10-29 00:01:19,479 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:19,479 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:19,480 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:19,480 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:19,483 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-29 00:01:19,483 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-29 00:01:19,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-10-29 00:01:19,500 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:01:19,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,537 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,538 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,544 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-29 00:01:19,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-10-29 00:01:19,554 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:19,554 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:19,554 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:19,554 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:19,557 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-29 00:01:19,557 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-29 00:01:19,588 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:01:19,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,626 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,632 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-29 00:01:19,641 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:19,641 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:01:19,641 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:19,641 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:19,641 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:19,642 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-10-29 00:01:19,642 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:01:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-10-29 00:01:19,660 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:01:19,664 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-10-29 00:01:19,664 INFO L444 ModelExtractionUtils]: 1 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-29 00:01:19,665 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:19,667 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:19,673 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:01:19,673 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:01:19,673 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:01:19,673 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2021-10-29 00:01:19,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-10-29 00:01:19,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,714 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:01:19,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:19,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 00:01:19,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:19,760 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:19,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:19,777 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2021-10-29 00:01:19,778 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:19,792 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 11 states and 16 transitions. Complement of second has 5 states. [2021-10-29 00:01:19,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-29 00:01:19,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:19,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2021-10-29 00:01:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2021-10-29 00:01:19,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2021-10-29 00:01:19,805 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:19,805 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2021-10-29 00:01:19,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:19,806 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2021-10-29 00:01:19,806 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:19,806 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2021-10-29 00:01:19,807 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:19,808 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2021-10-29 00:01:19,808 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-10-29 00:01:19,808 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-29 00:01:19,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2021-10-29 00:01:19,808 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:01:19,808 INFO L681 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-10-29 00:01:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2021-10-29 00:01:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-29 00:01:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2021-10-29 00:01:19,810 INFO L704 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2021-10-29 00:01:19,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:19,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 00:01:19,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 00:01:19,824 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:19,838 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:19,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:19,867 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2021-10-29 00:01:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 00:01:19,868 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2021-10-29 00:01:19,868 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:19,869 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2021-10-29 00:01:19,870 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-10-29 00:01:19,870 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-10-29 00:01:19,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2021-10-29 00:01:19,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:01:19,870 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2021-10-29 00:01:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2021-10-29 00:01:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2021-10-29 00:01:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2021-10-29 00:01:19,871 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-10-29 00:01:19,871 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2021-10-29 00:01:19,871 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-10-29 00:01:19,872 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2021-10-29 00:01:19,872 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:19,872 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:01:19,872 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:01:19,872 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-10-29 00:01:19,872 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-29 00:01:19,873 INFO L791 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 158#L17-2 assume !!(0 != main_~x~0); 153#L17 [2021-10-29 00:01:19,873 INFO L793 eck$LassoCheckResult]: Loop: 153#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 154#L17-2 assume !!(0 != main_~x~0); 153#L17 [2021-10-29 00:01:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-10-29 00:01:19,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:19,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901436144] [2021-10-29 00:01:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:19,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:19,879 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:19,897 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:19,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2021-10-29 00:01:19,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:19,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204104496] [2021-10-29 00:01:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:19,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:19,903 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:19,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:19,906 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:19,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:19,907 INFO L85 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2021-10-29 00:01:19,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:19,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072549273] [2021-10-29 00:01:19,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:19,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:19,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:19,920 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:19,924 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:19,963 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:19,963 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:19,963 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:19,963 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:19,964 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:01:19,964 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:19,965 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:19,965 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:19,965 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2021-10-29 00:01:19,966 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:19,966 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:19,969 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,973 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:19,981 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,040 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:20,041 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:01:20,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,048 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,054 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:20,054 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:20,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-10-29 00:01:20,072 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:01:20,073 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: [] [2021-10-29 00:01:20,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:20,110 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,110 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,111 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:20,125 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:20,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-10-29 00:01:20,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2021-10-29 00:01:20,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,165 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-10-29 00:01:20,173 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:01:20,173 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:20,272 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:01:20,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:20,275 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:20,275 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:20,275 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:20,276 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:20,276 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:01:20,276 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,276 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:20,276 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:20,276 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2021-10-29 00:01:20,276 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:20,276 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:20,277 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,280 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,297 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,365 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:20,365 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:01:20,366 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,366 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,377 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 [2021-10-29 00:01:20,386 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:20,386 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:20,386 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:20,386 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:20,389 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-29 00:01:20,389 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-29 00:01:20,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-10-29 00:01:20,408 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:01:20,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:20,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,448 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,453 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-10-29 00:01:20,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-10-29 00:01:20,461 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:20,461 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:01:20,461 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:20,461 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-29 00:01:20,462 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:20,463 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-29 00:01:20,463 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:01:20,477 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:01:20,480 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-29 00:01:20,480 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-29 00:01:20,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,484 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-10-29 00:01:20,500 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:01:20,500 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:01:20,501 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:01:20,501 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-10-29 00:01:20,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:20,541 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:01:20,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:20,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 00:01:20,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:20,572 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:20,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:20,616 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-29 00:01:20,616 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:20,630 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 11 states and 13 transitions. Complement of second has 5 states. [2021-10-29 00:01:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-29 00:01:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 00:01:20,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2021-10-29 00:01:20,632 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2021-10-29 00:01:20,632 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:20,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-29 00:01:20,633 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:20,633 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2021-10-29 00:01:20,634 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:20,635 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2021-10-29 00:01:20,637 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:20,640 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2021-10-29 00:01:20,640 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2021-10-29 00:01:20,640 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2021-10-29 00:01:20,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2021-10-29 00:01:20,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-10-29 00:01:20,641 INFO L681 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2021-10-29 00:01:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2021-10-29 00:01:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2021-10-29 00:01:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 5 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) [2021-10-29 00:01:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2021-10-29 00:01:20,645 INFO L704 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-10-29 00:01:20,645 INFO L587 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2021-10-29 00:01:20,645 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-10-29 00:01:20,646 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2021-10-29 00:01:20,647 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-10-29 00:01:20,647 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-10-29 00:01:20,647 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-10-29 00:01:20,648 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2021-10-29 00:01:20,648 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-10-29 00:01:20,648 INFO L791 eck$LassoCheckResult]: Stem: 208#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 203#L17-2 assume !!(0 != main_~x~0); 204#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 205#L17-2 assume !!(0 != main_~x~0); 206#L17 [2021-10-29 00:01:20,648 INFO L793 eck$LassoCheckResult]: Loop: 206#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 207#L17-2 assume !!(0 != main_~x~0); 206#L17 [2021-10-29 00:01:20,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:20,649 INFO L85 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2021-10-29 00:01:20,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:20,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603404626] [2021-10-29 00:01:20,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:20,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:20,673 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:20,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:20,682 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:20,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2021-10-29 00:01:20,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:20,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843541054] [2021-10-29 00:01:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:20,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:20,694 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 00:01:20,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 00:01:20,698 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-29 00:01:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:20,700 INFO L85 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2021-10-29 00:01:20,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-29 00:01:20,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310481761] [2021-10-29 00:01:20,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 00:01:20,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 00:01:20,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:20,755 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-29 00:01:20,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310481761] [2021-10-29 00:01:20,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310481761] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 00:01:20,755 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 00:01:20,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 00:01:20,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982528080] [2021-10-29 00:01:20,773 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:20,773 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:20,773 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:20,773 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:20,773 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-10-29 00:01:20,773 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,774 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:20,774 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:20,774 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2021-10-29 00:01:20,774 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:20,774 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:20,776 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,778 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,785 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:20,837 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:20,837 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-10-29 00:01:20,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,838 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,845 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:20,845 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:20,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-10-29 00:01:20,876 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-10-29 00:01:20,876 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-10-29 00:01:20,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:20,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,913 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,916 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-10-29 00:01:20,916 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:20,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-10-29 00:01:20,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-10-29 00:01:20,957 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:20,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:20,958 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:20,965 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-10-29 00:01:20,965 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-10-29 00:01:20,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-10-29 00:01:21,063 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-10-29 00:01:21,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:21,067 INFO L210 LassoAnalysis]: Preferences: [2021-10-29 00:01:21,067 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-10-29 00:01:21,067 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-10-29 00:01:21,067 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-10-29 00:01:21,067 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-10-29 00:01:21,067 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:21,067 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-10-29 00:01:21,067 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-10-29 00:01:21,067 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2021-10-29 00:01:21,067 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-10-29 00:01:21,068 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-10-29 00:01:21,069 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:21,073 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:21,104 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-10-29 00:01:21,176 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-10-29 00:01:21,177 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-10-29 00:01:21,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:21,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:21,188 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:21,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-10-29 00:01:21,237 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 [2021-10-29 00:01:21,252 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:21,252 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:21,252 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-10-29 00:01:21,252 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:21,254 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-10-29 00:01:21,254 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-10-29 00:01:21,284 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-10-29 00:01:21,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:21,325 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:21,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:21,326 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:21,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-10-29 00:01:21,332 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 [2021-10-29 00:01:21,339 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-10-29 00:01:21,339 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-10-29 00:01:21,339 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-10-29 00:01:21,339 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2021-10-29 00:01:21,339 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-10-29 00:01:21,341 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-10-29 00:01:21,341 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-10-29 00:01:21,364 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-10-29 00:01:21,368 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-10-29 00:01:21,368 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-10-29 00:01:21,368 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-10-29 00:01:21,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 [2021-10-29 00:01:21,369 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-10-29 00:01:21,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-10-29 00:01:21,370 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-10-29 00:01:21,370 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-10-29 00:01:21,371 INFO L513 LassoAnalysis]: Proved termination. [2021-10-29 00:01:21,371 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2021-10-29 00:01:21,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:21,408 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-10-29 00:01:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:21,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:21,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 00:01:21,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:21,476 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:21,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:21,510 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-29 00:01:21,511 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 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) [2021-10-29 00:01:21,515 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. 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) Result 7 states and 8 transitions. Complement of second has 3 states. [2021-10-29 00:01:21,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-10-29 00:01:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-10-29 00:01:21,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-10-29 00:01:21,516 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-29 00:01:21,516 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:21,517 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-29 00:01:21,520 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 00:01:21,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:21,553 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:21,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:21,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:21,576 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-29 00:01:21,577 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 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) [2021-10-29 00:01:21,580 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. 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) Result 7 states and 8 transitions. Complement of second has 3 states. [2021-10-29 00:01:21,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2021-10-29 00:01:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-10-29 00:01:21,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2021-10-29 00:01:21,582 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-29 00:01:21,582 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:21,582 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-10-29 00:01:21,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 00:01:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 00:01:21,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:21,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 00:01:21,627 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-29 00:01:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 00:01:21,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 00:01:21,659 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 2 loop predicates [2021-10-29 00:01:21,659 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 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) [2021-10-29 00:01:21,672 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. 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) Result 8 states and 9 transitions. Complement of second has 4 states. [2021-10-29 00:01:21,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2021-10-29 00:01:21,673 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-10-29 00:01:21,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-10-29 00:01:21,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2021-10-29 00:01:21,674 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:21,674 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-10-29 00:01:21,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:21,675 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2021-10-29 00:01:21,675 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-10-29 00:01:21,675 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2021-10-29 00:01:21,677 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-29 00:01:21,677 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2021-10-29 00:01:21,677 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-29 00:01:21,677 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-29 00:01:21,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-29 00:01:21,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-29 00:01:21,677 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:21,678 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:21,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-29 00:01:21,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 00:01:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 00:01:21,682 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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) [2021-10-29 00:01:21,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 00:01:21,683 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2021-10-29 00:01:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 00:01:21,683 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2021-10-29 00:01:21,683 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-29 00:01:21,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2021-10-29 00:01:21,684 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-10-29 00:01:21,684 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-10-29 00:01:21,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-10-29 00:01:21,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-10-29 00:01:21,684 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:21,684 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:21,684 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-29 00:01:21,684 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-10-29 00:01:21,685 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-10-29 00:01:21,685 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-10-29 00:01:21,685 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-10-29 00:01:21,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 29.10 12:01:21 BoogieIcfgContainer [2021-10-29 00:01:21,691 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-10-29 00:01:21,692 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 00:01:21,692 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 00:01:21,692 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 00:01:21,692 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 12:01:17" (3/4) ... [2021-10-29 00:01:21,695 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 00:01:21,695 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 00:01:21,699 INFO L168 Benchmark]: Toolchain (without parser) took 4845.92 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 67.4 MB in the beginning and 92.5 MB in the end (delta: -25.1 MB). Peak memory consumption was 8.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:21,699 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 98.6 MB. Free memory is still 52.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:01:21,700 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.27 ms. Allocated memory is still 98.6 MB. Free memory was 67.2 MB in the beginning and 76.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:21,701 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.46 ms. Allocated memory is still 98.6 MB. Free memory was 76.3 MB in the beginning and 74.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:01:21,702 INFO L168 Benchmark]: Boogie Preprocessor took 16.45 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 73.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:21,702 INFO L168 Benchmark]: RCFGBuilder took 215.33 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 66.5 MB in the end (delta: 7.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:21,703 INFO L168 Benchmark]: BuchiAutomizer took 4288.17 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 66.5 MB in the beginning and 92.5 MB in the end (delta: -26.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. [2021-10-29 00:01:21,704 INFO L168 Benchmark]: Witness Printer took 4.06 ms. Allocated memory is still 132.1 MB. Free memory is still 92.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 00:01:21,707 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 98.6 MB. Free memory is still 52.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.27 ms. Allocated memory is still 98.6 MB. Free memory was 67.2 MB in the beginning and 76.3 MB in the end (delta: -9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.46 ms. Allocated memory is still 98.6 MB. Free memory was 76.3 MB in the beginning and 74.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 16.45 ms. Allocated memory is still 98.6 MB. Free memory was 74.9 MB in the beginning and 73.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 215.33 ms. Allocated memory is still 98.6 MB. Free memory was 73.9 MB in the beginning and 66.5 MB in the end (delta: 7.4 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 4288.17 ms. Allocated memory was 98.6 MB in the beginning and 132.1 MB in the end (delta: 33.6 MB). Free memory was 66.5 MB in the beginning and 92.5 MB in the end (delta: -26.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 16.1 GB. * Witness Printer took 4.06 ms. Allocated memory is still 132.1 MB. Free memory is still 92.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 4 locations. One deterministic module has affine ranking function x and consists of 3 locations. One deterministic module has affine ranking function -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 4.2s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 3.5s. Construction of modules took 0.0s. Büchi inclusion checks took 0.5s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 42 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax202 hnf100 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 50ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.8s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-10-29 00:01:21,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-29 00:01:21,940 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7514aecd-a7aa-4df8-8390-20090b18b56a/bin/uautomizer-GMMbpWq8iD/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request...