./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/Piecewise.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/Piecewise.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU --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 ac2fbc3b92c237eee672d002679ee7a51e4ecff20f91c05c8145e18adc82f593 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:36:20,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:36:20,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:36:20,564 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:36:20,565 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:36:20,569 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:36:20,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:36:20,575 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:36:20,578 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:36:20,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:36:20,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:36:20,589 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:36:20,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:36:20,592 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:36:20,595 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:36:20,605 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:36:20,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:36:20,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:36:20,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:36:20,617 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:36:20,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:36:20,622 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:36:20,626 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:36:20,627 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:36:20,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:36:20,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:36:20,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:36:20,643 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:36:20,644 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:36:20,645 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:36:20,646 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:36:20,647 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:36:20,649 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:36:20,650 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:36:20,651 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:36:20,652 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:36:20,653 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:36:20,653 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:36:20,653 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:36:20,654 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:36:20,655 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:36:20,656 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-02 22:36:20,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:36:20,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:36:20,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:36:20,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:36:20,685 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:36:20,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:36:20,686 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:36:20,686 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-02 22:36:20,687 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-02 22:36:20,687 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-02 22:36:20,687 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-02 22:36:20,687 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-02 22:36:20,688 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-02 22:36:20,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:36:20,688 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:36:20,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:36:20,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:36:20,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-02 22:36:20,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-02 22:36:20,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-02 22:36:20,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 22:36:20,690 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-02 22:36:20,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:36:20,690 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-02 22:36:20,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:36:20,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:36:20,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:36:20,691 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:36:20,691 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:36:20,693 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-02 22:36:20,693 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_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac2fbc3b92c237eee672d002679ee7a51e4ecff20f91c05c8145e18adc82f593 [2021-11-02 22:36:20,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:36:20,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:36:21,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:36:21,004 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:36:21,005 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:36:21,006 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/termination-crafted/Piecewise.c [2021-11-02 22:36:21,138 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/data/a60203e16/125efde3a0aa4bdba2c7ff534c305ae6/FLAG938bd4499 [2021-11-02 22:36:21,632 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:36:21,633 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/sv-benchmarks/c/termination-crafted/Piecewise.c [2021-11-02 22:36:21,645 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/data/a60203e16/125efde3a0aa4bdba2c7ff534c305ae6/FLAG938bd4499 [2021-11-02 22:36:21,982 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/data/a60203e16/125efde3a0aa4bdba2c7ff534c305ae6 [2021-11-02 22:36:21,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:36:21,986 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 22:36:21,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:36:21,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:36:21,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:36:21,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:36:21" (1/1) ... [2021-11-02 22:36:21,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1223e2f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:21, skipping insertion in model container [2021-11-02 22:36:21,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:36:21" (1/1) ... [2021-11-02 22:36:22,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:36:22,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:36:22,167 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:36:22,176 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:36:22,210 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:36:22,222 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:36:22,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22 WrapperNode [2021-11-02 22:36:22,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:36:22,225 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 22:36:22,225 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 22:36:22,225 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 22:36:22,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,240 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,260 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 22:36:22,262 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:36:22,262 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:36:22,262 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:36:22,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,274 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,284 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:36:22,285 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:36:22,285 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:36:22,286 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:36:22,287 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (1/1) ... [2021-11-02 22:36:22,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:22,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:22,323 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:22,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-02 22:36:22,388 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:36:22,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:36:22,576 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:36:22,577 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-02 22:36:22,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:36:22 BoogieIcfgContainer [2021-11-02 22:36:22,583 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:36:22,584 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-02 22:36:22,584 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-02 22:36:22,589 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-02 22:36:22,590 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-02 22:36:22,591 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 02.11 10:36:21" (1/3) ... [2021-11-02 22:36:22,593 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@79edb121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 10:36:22, skipping insertion in model container [2021-11-02 22:36:22,593 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-02 22:36:22,594 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:36:22" (2/3) ... [2021-11-02 22:36:22,594 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@79edb121 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 02.11 10:36:22, skipping insertion in model container [2021-11-02 22:36:22,595 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-02 22:36:22,595 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:36:22" (3/3) ... [2021-11-02 22:36:22,596 INFO L389 chiAutomizerObserver]: Analyzing ICFG Piecewise.c [2021-11-02 22:36:22,670 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-02 22:36:22,670 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-02 22:36:22,671 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-02 22:36:22,671 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-02 22:36:22,671 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-02 22:36:22,671 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-02 22:36:22,671 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-02 22:36:22,671 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-02 22:36:22,687 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:22,706 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:22,706 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:22,706 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:22,713 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-11-02 22:36:22,714 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-02 22:36:22,714 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-02 22:36:22,714 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:22,715 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:22,715 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:22,716 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:22,716 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-11-02 22:36:22,716 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-02 22:36:22,723 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 5#L26-2true [2021-11-02 22:36:22,724 INFO L793 eck$LassoCheckResult]: Loop: 5#L26-2true assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 6#L23true assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 5#L26-2true [2021-11-02 22:36:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:22,730 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-11-02 22:36:22,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:22,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765924147] [2021-11-02 22:36:22,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:22,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:22,819 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:22,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:22,839 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:22,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:22,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-11-02 22:36:22,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:22,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689975977] [2021-11-02 22:36:22,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:22,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:22,863 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:22,883 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:22,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:22,888 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-11-02 22:36:22,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:22,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64423307] [2021-11-02 22:36:22,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:22,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:22,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:22,914 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:22,921 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:23,026 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:23,028 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:23,029 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:23,035 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:23,036 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-02 22:36:23,036 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,036 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:23,036 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:23,036 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-11-02 22:36:23,036 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:23,037 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:23,072 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:23,083 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:23,087 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:23,230 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:23,231 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-02 22:36:23,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,236 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:23,242 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:23,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-02 22:36:23,269 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:23,269 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: [] [2021-11-02 22:36:23,291 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,293 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-02 22:36:23,294 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:23,294 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:23,308 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:23,309 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: [] [2021-11-02 22:36:23,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,340 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-02 22:36:23,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:23,342 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:23,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2021-11-02 22:36:23,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-02 22:36:23,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-02 22:36:23,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:23,478 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-02 22:36:23,481 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,482 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:23,482 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:23,482 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:23,482 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:23,482 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-02 22:36:23,482 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,482 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:23,483 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:23,483 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-11-02 22:36:23,483 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:23,483 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:23,485 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:23,506 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:23,510 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:23,602 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:23,607 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-02 22:36:23,609 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,609 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,610 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,617 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 [2021-11-02 22:36:23,627 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:23,628 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:23,628 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:23,628 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:23,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-02 22:36:23,661 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-02 22:36:23,662 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-02 22:36:23,678 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-02 22:36:23,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,715 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-02 22:36:23,718 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-02 22:36:23,726 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:23,726 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:23,726 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:23,726 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:23,732 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-02 22:36:23,732 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-02 22:36:23,757 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-02 22:36:23,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,797 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,804 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 [2021-11-02 22:36:23,815 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:23,815 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-02 22:36:23,816 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:23,816 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:23,816 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:23,822 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-02 22:36:23,822 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-02 22:36:23,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-02 22:36:23,841 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-02 22:36:23,847 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-02 22:36:23,848 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-02 22:36:23,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:23,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:23,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:23,878 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-02 22:36:23,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-02 22:36:23,878 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-02 22:36:23,878 INFO L513 LassoAnalysis]: Proved termination. [2021-11-02 22:36:23,879 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-11-02 22:36:23,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:23,910 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-02 22:36:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:23,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:23,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:24,040 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 [2021-11-02 22:36:24,042 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-02 22:36:24,106 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0). 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 37 states and 48 transitions. Complement of second has 8 states. [2021-11-02 22:36:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:24,109 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) [2021-11-02 22:36:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-11-02 22:36:24,111 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 2 letters. [2021-11-02 22:36:24,112 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:24,112 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 3 letters. Loop has 2 letters. [2021-11-02 22:36:24,113 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:24,113 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 4 letters. [2021-11-02 22:36:24,113 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:24,114 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 48 transitions. [2021-11-02 22:36:24,118 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-02 22:36:24,122 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 13 states and 19 transitions. [2021-11-02 22:36:24,123 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-11-02 22:36:24,124 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-11-02 22:36:24,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-11-02 22:36:24,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-02 22:36:24,125 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-11-02 22:36:24,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-11-02 22:36:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-02 22:36:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2021-11-02 22:36:24,147 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-11-02 22:36:24,147 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-11-02 22:36:24,147 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-02 22:36:24,147 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2021-11-02 22:36:24,148 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-02 22:36:24,148 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:24,149 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:24,149 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-02 22:36:24,149 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-02 22:36:24,149 INFO L791 eck$LassoCheckResult]: Stem: 82#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 83#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 85#L23 [2021-11-02 22:36:24,150 INFO L793 eck$LassoCheckResult]: Loop: 85#L23 assume !(main_~q~0 < main_~p~0); 88#L26 assume !(main_~p~0 < main_~q~0); 84#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 85#L23 [2021-11-02 22:36:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-11-02 22:36:24,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:24,151 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845353338] [2021-11-02 22:36:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:24,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,157 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,162 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:24,162 INFO L85 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2021-11-02 22:36:24,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:24,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757138612] [2021-11-02 22:36:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:24,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:24,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:24,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:36:24,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757138612] [2021-11-02 22:36:24,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757138612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:36:24,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:36:24,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 22:36:24,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815698230] [2021-11-02 22:36:24,212 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-11-02 22:36:24,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:36:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:36:24,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:36:24,216 INFO L87 Difference]: Start difference. First operand 12 states and 18 transitions. cyclomatic complexity: 9 Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 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) [2021-11-02 22:36:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:36:24,233 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-11-02 22:36:24,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:36:24,235 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-11-02 22:36:24,236 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:24,236 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 12 transitions. [2021-11-02 22:36:24,236 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-11-02 22:36:24,237 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-11-02 22:36:24,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-11-02 22:36:24,237 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-02 22:36:24,237 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-11-02 22:36:24,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-11-02 22:36:24,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-11-02 22:36:24,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:24,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-11-02 22:36:24,239 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-02 22:36:24,239 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-02 22:36:24,239 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-02 22:36:24,239 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-11-02 22:36:24,240 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:24,240 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:24,240 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:24,240 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-02 22:36:24,240 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-02 22:36:24,240 INFO L791 eck$LassoCheckResult]: Stem: 114#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 115#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 119#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-11-02 22:36:24,241 INFO L793 eck$LassoCheckResult]: Loop: 121#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 116#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 117#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-11-02 22:36:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:24,241 INFO L85 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-11-02 22:36:24,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:24,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813593620] [2021-11-02 22:36:24,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:24,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,247 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:24,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,252 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2021-11-02 22:36:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:24,254 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818270013] [2021-11-02 22:36:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:24,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,260 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,266 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:24,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2021-11-02 22:36:24,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:24,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555853810] [2021-11-02 22:36:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:24,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:24,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,276 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:24,284 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:24,336 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:24,336 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:24,336 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:24,336 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:24,336 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-02 22:36:24,336 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,336 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:24,336 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:24,337 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-11-02 22:36:24,337 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:24,337 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:24,339 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:24,342 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:24,355 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:24,439 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:24,439 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-02 22:36:24,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:24,442 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:24,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:24,447 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:24,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-02 22:36:24,466 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:24,466 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: [] [2021-11-02 22:36:24,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:24,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:24,506 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:24,512 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:24,512 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:24,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-02 22:36:24,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:24,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:24,568 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:24,574 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-02 22:36:24,575 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:24,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-02 22:36:24,779 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-02 22:36:24,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:24,785 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:24,785 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:24,785 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:24,785 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:24,786 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-02 22:36:24,786 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,786 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:24,786 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:24,786 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-11-02 22:36:24,786 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:24,786 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:24,787 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:24,793 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:24,808 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:24,910 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:24,910 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-02 22:36:24,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:24,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:24,922 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 [2021-11-02 22:36:24,933 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:24,933 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:24,933 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:24,933 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:24,944 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-02 22:36:24,945 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-02 22:36:24,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-02 22:36:24,961 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-02 22:36:24,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:24,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:24,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:24,998 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:25,002 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 [2021-11-02 22:36:25,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-02 22:36:25,021 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:25,021 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-02 22:36:25,022 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:25,022 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:25,022 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:25,024 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-02 22:36:25,024 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-02 22:36:25,043 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-02 22:36:25,062 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-02 22:36:25,062 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-02 22:36:25,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:25,077 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:25,090 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-02 22:36:25,090 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-02 22:36:25,090 INFO L513 LassoAnalysis]: Proved termination. [2021-11-02 22:36:25,090 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-11-02 22:36:25,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-02 22:36:25,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:25,132 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-02 22:36:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:25,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:25,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:25,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:25,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:25,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:25,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:25,271 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-02 22:36:25,271 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5 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) [2021-11-02 22:36:25,299 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 8 states and 11 transitions. cyclomatic complexity: 5. 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) Result 16 states and 20 transitions. Complement of second has 7 states. [2021-11-02 22:36:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-11-02 22:36:25,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-02 22:36:25,317 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2021-11-02 22:36:25,317 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:25,318 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2021-11-02 22:36:25,320 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:25,320 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2021-11-02 22:36:25,321 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:25,321 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 20 transitions. [2021-11-02 22:36:25,346 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:25,347 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 17 transitions. [2021-11-02 22:36:25,347 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-11-02 22:36:25,347 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-11-02 22:36:25,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2021-11-02 22:36:25,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-02 22:36:25,347 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-02 22:36:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2021-11-02 22:36:25,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-02 22:36:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 11 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) [2021-11-02 22:36:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-02 22:36:25,350 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-02 22:36:25,350 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-02 22:36:25,350 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-02 22:36:25,350 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2021-11-02 22:36:25,352 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:25,352 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:25,352 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:25,353 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-11-02 22:36:25,353 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-02 22:36:25,353 INFO L791 eck$LassoCheckResult]: Stem: 181#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 182#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 186#L23 assume !(main_~q~0 < main_~p~0); 192#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 190#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 191#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 183#L26-2 [2021-11-02 22:36:25,353 INFO L793 eck$LassoCheckResult]: Loop: 183#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 184#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 183#L26-2 [2021-11-02 22:36:25,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:25,354 INFO L85 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2021-11-02 22:36:25,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:25,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979201730] [2021-11-02 22:36:25,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:25,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:25,370 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:25,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:25,383 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:25,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:25,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-11-02 22:36:25,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:25,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904062485] [2021-11-02 22:36:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:25,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:25,389 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:25,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:25,398 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash 666829459, now seen corresponding path program 2 times [2021-11-02 22:36:25,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:25,399 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562828837] [2021-11-02 22:36:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:25,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:25,424 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:25,434 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:25,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:25,494 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:25,494 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:25,494 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:25,495 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:25,495 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-02 22:36:25,495 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,495 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:25,495 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:25,495 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-11-02 22:36:25,495 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:25,497 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:25,499 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:25,511 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:25,514 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:25,572 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:25,572 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-02 22:36:25,573 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:25,574 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:25,582 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:25,582 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:25,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-02 22:36:25,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:25,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:25,625 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:25,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-02 22:36:25,626 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-02 22:36:25,626 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:25,688 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-02 22:36:25,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:25,695 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:25,695 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:25,695 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:25,695 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:25,695 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-02 22:36:25,695 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,695 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:25,696 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:25,696 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-11-02 22:36:25,696 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:25,696 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:25,697 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:25,708 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:25,711 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:25,761 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:25,761 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-02 22:36:25,761 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:25,762 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:25,777 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 [2021-11-02 22:36:25,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:25,787 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-02 22:36:25,787 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:25,787 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:25,787 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:25,789 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-02 22:36:25,789 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-02 22:36:25,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-02 22:36:25,805 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-02 22:36:25,810 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-02 22:36:25,810 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-02 22:36:25,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:25,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:25,811 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:25,817 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-02 22:36:25,817 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-02 22:36:25,817 INFO L513 LassoAnalysis]: Proved termination. [2021-11-02 22:36:25,817 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-11-02 22:36:25,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-02 22:36:25,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:25,854 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-02 22:36:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:25,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:25,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:25,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:25,925 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 [2021-11-02 22:36:25,925 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7 Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:25,949 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 27 states and 34 transitions. Complement of second has 5 states. [2021-11-02 22:36:25,949 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 [2021-11-02 22:36:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:25,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-02 22:36:25,950 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-02 22:36:25,951 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:25,951 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-02 22:36:25,951 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:25,951 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2021-11-02 22:36:25,951 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:25,952 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2021-11-02 22:36:25,961 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:25,963 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 30 transitions. [2021-11-02 22:36:25,964 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-11-02 22:36:25,964 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-11-02 22:36:25,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2021-11-02 22:36:25,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-02 22:36:25,965 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-02 22:36:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2021-11-02 22:36:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-11-02 22:36:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-11-02 22:36:25,973 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-02 22:36:25,973 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-02 22:36:25,973 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-02 22:36:25,973 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 28 transitions. [2021-11-02 22:36:25,974 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-02 22:36:25,975 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:25,975 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:25,976 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-11-02 22:36:25,976 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-02 22:36:25,976 INFO L791 eck$LassoCheckResult]: Stem: 265#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 266#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 283#L23 assume !(main_~q~0 < main_~p~0); 281#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 280#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 275#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 267#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 269#L23 assume !(main_~q~0 < main_~p~0); 271#L26 [2021-11-02 22:36:25,976 INFO L793 eck$LassoCheckResult]: Loop: 271#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 278#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 279#L23 assume !(main_~q~0 < main_~p~0); 271#L26 [2021-11-02 22:36:25,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:25,977 INFO L85 PathProgramCache]: Analyzing trace with hash 666829461, now seen corresponding path program 3 times [2021-11-02 22:36:25,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:25,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972839876] [2021-11-02 22:36:25,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:25,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:26,000 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:26,023 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:26,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:26,024 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 2 times [2021-11-02 22:36:26,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:26,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673339193] [2021-11-02 22:36:26,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:26,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:26,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:26,030 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:26,034 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:26,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1292746274, now seen corresponding path program 4 times [2021-11-02 22:36:26,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:26,036 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082786806] [2021-11-02 22:36:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:26,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:26,045 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:26,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:26,056 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:26,106 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:26,106 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:26,106 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:26,106 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:26,106 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-02 22:36:26,106 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,106 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:26,107 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:26,107 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-11-02 22:36:26,107 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:26,107 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:26,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:26,116 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:26,134 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:26,205 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:26,205 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-02 22:36:26,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:26,206 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:26,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-02 22:36:26,219 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:26,219 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:26,242 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:26,242 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: [] [2021-11-02 22:36:26,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:26,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:26,282 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:26,285 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:26,285 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:26,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-02 22:36:26,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:26,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:26,337 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:26,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-02 22:36:26,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-02 22:36:26,339 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:26,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-02 22:36:26,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:26,533 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:26,533 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:26,534 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:26,534 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:26,534 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-02 22:36:26,534 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,534 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:26,534 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:26,534 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-11-02 22:36:26,534 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:26,534 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:26,535 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:26,561 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:26,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:26,626 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:26,626 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-02 22:36:26,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:26,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:26,630 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 [2021-11-02 22:36:26,639 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:26,640 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-02 22:36:26,640 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:26,640 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:26,640 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:26,642 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-02 22:36:26,642 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-02 22:36:26,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-02 22:36:26,653 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-02 22:36:26,666 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-02 22:36:26,666 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-02 22:36:26,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:26,670 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:26,674 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-02 22:36:26,674 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-02 22:36:26,674 INFO L513 LassoAnalysis]: Proved termination. [2021-11-02 22:36:26,675 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-11-02 22:36:26,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-02 22:36:26,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:26,712 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-02 22:36:26,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:26,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:26,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:26,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:26,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:26,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:26,810 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-02 22:36:26,811 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:26,875 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 28 states and 35 transitions. Complement of second has 7 states. [2021-11-02 22:36:26,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:26,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:26,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-02 22:36:26,878 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-02 22:36:26,878 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:26,878 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-02 22:36:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:26,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:26,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:26,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:26,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:26,972 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-02 22:36:26,972 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:26,994 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 25 states and 34 transitions. Complement of second has 7 states. [2021-11-02 22:36:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2021-11-02 22:36:26,995 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-02 22:36:26,995 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:26,995 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-02 22:36:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:27,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:27,063 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2021-11-02 22:36:27,064 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12 Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:27,081 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states and 28 transitions. cyclomatic complexity: 12. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 34 states and 42 transitions. Complement of second has 6 states. [2021-11-02 22:36:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:27,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-11-02 22:36:27,082 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-02 22:36:27,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:27,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 11 letters. Loop has 3 letters. [2021-11-02 22:36:27,083 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:27,083 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 6 letters. [2021-11-02 22:36:27,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:27,084 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 42 transitions. [2021-11-02 22:36:27,085 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-02 22:36:27,086 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 25 states and 33 transitions. [2021-11-02 22:36:27,086 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-11-02 22:36:27,086 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-11-02 22:36:27,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 33 transitions. [2021-11-02 22:36:27,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-02 22:36:27,086 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-02 22:36:27,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 33 transitions. [2021-11-02 22:36:27,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-02 22:36:27,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 16 states have (on average 1.3125) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:27,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-02 22:36:27,089 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-02 22:36:27,089 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-02 22:36:27,089 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-02 22:36:27,089 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 21 transitions. [2021-11-02 22:36:27,090 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-11-02 22:36:27,090 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:27,090 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:27,090 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-11-02 22:36:27,090 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2021-11-02 22:36:27,091 INFO L791 eck$LassoCheckResult]: Stem: 516#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 517#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 519#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 524#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 522#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-11-02 22:36:27,091 INFO L793 eck$LassoCheckResult]: Loop: 523#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 520#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 521#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 528#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 529#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-11-02 22:36:27,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:27,091 INFO L85 PathProgramCache]: Analyzing trace with hash 29863400, now seen corresponding path program 1 times [2021-11-02 22:36:27,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:27,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643513019] [2021-11-02 22:36:27,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:27,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:27,097 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:27,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:27,102 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:27,103 INFO L85 PathProgramCache]: Analyzing trace with hash 45563257, now seen corresponding path program 1 times [2021-11-02 22:36:27,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:27,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698619198] [2021-11-02 22:36:27,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:27,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:27,110 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:27,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:27,115 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:27,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:27,116 INFO L85 PathProgramCache]: Analyzing trace with hash -974968846, now seen corresponding path program 5 times [2021-11-02 22:36:27,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:27,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565238367] [2021-11-02 22:36:27,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:27,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:27,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:27,124 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:27,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:27,133 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:27,204 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:27,204 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:27,204 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:27,205 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:27,205 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-02 22:36:27,205 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,205 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:27,205 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:27,205 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-11-02 22:36:27,205 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:27,205 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:27,207 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:27,210 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:27,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:27,292 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:27,292 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-02 22:36:27,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,294 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,296 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:27,297 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:27,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-02 22:36:27,314 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:27,314 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_9=1} Honda state: {v_rep~unnamed0~0~true_9=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-02 22:36:27,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:27,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,352 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,354 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:27,354 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:27,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-11-02 22:36:27,382 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:27,382 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_9=0} Honda state: {v_rep~unnamed0~0~false_9=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-02 22:36:27,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Ended with exit code 0 [2021-11-02 22:36:27,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,411 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-02 22:36:27,413 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:27,413 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:27,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:27,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,478 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,480 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-02 22:36:27,480 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:27,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-02 22:36:27,690 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-02 22:36:27,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:27,693 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:27,693 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:27,694 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:27,694 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:27,694 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-02 22:36:27,694 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,694 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:27,694 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:27,694 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-11-02 22:36:27,694 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:27,694 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:27,695 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:27,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:27,710 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:27,772 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:27,772 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-02 22:36:27,773 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,774 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,782 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-02 22:36:27,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-02 22:36:27,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:27,791 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:27,791 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:27,791 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:27,794 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-02 22:36:27,794 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-02 22:36:27,807 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-02 22:36:27,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:27,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,843 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,850 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 [2021-11-02 22:36:27,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-02 22:36:27,857 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:27,858 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-02 22:36:27,858 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:27,858 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:27,858 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:27,859 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-02 22:36:27,859 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-02 22:36:27,868 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-02 22:36:27,871 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-02 22:36:27,871 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-02 22:36:27,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:27,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:27,872 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:27,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-11-02 22:36:27,873 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-02 22:36:27,875 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-02 22:36:27,875 INFO L513 LassoAnalysis]: Proved termination. [2021-11-02 22:36:27,875 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-11-02 22:36:27,895 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Ended with exit code 0 [2021-11-02 22:36:27,895 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-02 22:36:27,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:27,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:27,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:27,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:36:27,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:28,004 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 4 loop predicates [2021-11-02 22:36:28,004 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-11-02 22:36:28,029 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) Result 31 states and 39 transitions. Complement of second has 7 states. [2021-11-02 22:36:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-11-02 22:36:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-02 22:36:28,030 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 5 letters. [2021-11-02 22:36:28,031 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:28,031 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-02 22:36:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:28,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:28,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 22:36:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:28,139 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 4 loop predicates [2021-11-02 22:36:28,139 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8 Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-11-02 22:36:28,185 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 21 transitions. cyclomatic complexity: 8. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) Result 33 states and 44 transitions. Complement of second has 8 states. [2021-11-02 22:36:28,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 3 non-accepting loop states 1 accepting loop states [2021-11-02 22:36:28,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-11-02 22:36:28,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-11-02 22:36:28,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 5 letters. [2021-11-02 22:36:28,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:28,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 10 letters. Loop has 5 letters. [2021-11-02 22:36:28,186 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:28,186 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 10 letters. [2021-11-02 22:36:28,187 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:28,187 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 44 transitions. [2021-11-02 22:36:28,189 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-02 22:36:28,190 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 26 states and 35 transitions. [2021-11-02 22:36:28,190 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-11-02 22:36:28,191 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-11-02 22:36:28,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-11-02 22:36:28,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-02 22:36:28,191 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-02 22:36:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-11-02 22:36:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-02 22:36:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-02 22:36:28,239 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-02 22:36:28,239 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-02 22:36:28,239 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-11-02 22:36:28,239 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 34 transitions. [2021-11-02 22:36:28,245 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-02 22:36:28,245 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-02 22:36:28,245 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-02 22:36:28,245 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-11-02 22:36:28,246 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-02 22:36:28,246 INFO L791 eck$LassoCheckResult]: Stem: 695#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 696#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 698#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 713#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 701#L23 assume !(main_~q~0 < main_~p~0); 702#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 712#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 710#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 709#L26-2 [2021-11-02 22:36:28,246 INFO L793 eck$LassoCheckResult]: Loop: 709#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 708#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 709#L26-2 [2021-11-02 22:36:28,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,247 INFO L85 PathProgramCache]: Analyzing trace with hash 602336749, now seen corresponding path program 6 times [2021-11-02 22:36:28,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:28,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816292176] [2021-11-02 22:36:28,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:28,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:28,273 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:28,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:28,292 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 3 times [2021-11-02 22:36:28,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:28,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593946065] [2021-11-02 22:36:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:28,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:28,298 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:28,300 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:28,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,301 INFO L85 PathProgramCache]: Analyzing trace with hash -974968848, now seen corresponding path program 7 times [2021-11-02 22:36:28,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:36:28,302 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676458109] [2021-11-02 22:36:28,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:36:28,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:36:28,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:28,324 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:36:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:36:28,336 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:36:28,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:28,377 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:28,377 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:28,377 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:28,377 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:28,377 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-02 22:36:28,378 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,378 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:28,378 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:28,378 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-11-02 22:36:28,378 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:28,378 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:28,382 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:28,385 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:28,388 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:28,445 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:28,445 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-02 22:36:28,445 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:28,450 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,454 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:28,454 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:28,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-02 22:36:28,475 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:28,476 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_11=1} Honda state: {v_rep~unnamed0~0~true_11=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-02 22:36:28,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:28,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:28,501 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-11-02 22:36:28,502 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:28,502 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:28,519 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-02 22:36:28,520 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_11=0} Honda state: {v_rep~unnamed0~0~false_11=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2021-11-02 22:36:28,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:28,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:28,543 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-11-02 22:36:28,545 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-02 22:36:28,545 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:28,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:28,579 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-02 22:36:28,583 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-02 22:36:28,583 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-02 22:36:28,629 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-02 22:36:28,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Ended with exit code 0 [2021-11-02 22:36:28,632 INFO L210 LassoAnalysis]: Preferences: [2021-11-02 22:36:28,632 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-02 22:36:28,632 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-02 22:36:28,632 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-02 22:36:28,632 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-02 22:36:28,632 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,632 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-02 22:36:28,633 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-02 22:36:28,633 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-11-02 22:36:28,633 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-02 22:36:28,633 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-02 22:36:28,634 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:28,645 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:28,648 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-02 22:36:28,697 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-02 22:36:28,697 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-02 22:36:28,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:28,698 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,711 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-11-02 22:36:28,723 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-02 22:36:28,723 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-02 22:36:28,724 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-02 22:36:28,724 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-02 22:36:28,724 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-02 22:36:28,726 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-02 22:36:28,726 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-02 22:36:28,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-11-02 22:36:28,741 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-02 22:36:28,745 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-02 22:36:28,745 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-02 22:36:28,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-02 22:36:28,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:36:28,747 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-02 22:36:28,749 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-02 22:36:28,749 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-02 22:36:28,749 INFO L513 LassoAnalysis]: Proved termination. [2021-11-02 22:36:28,750 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-11-02 22:36:28,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-11-02 22:36:28,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Ended with exit code 0 [2021-11-02 22:36:28,778 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-02 22:36:28,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:28,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:28,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:28,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:28,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:28,877 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 [2021-11-02 22:36:28,878 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:28,897 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 33 states and 43 transitions. Complement of second has 5 states. [2021-11-02 22:36:28,898 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 [2021-11-02 22:36:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:28,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-02 22:36:28,899 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-02 22:36:28,899 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:28,899 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-02 22:36:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:28,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:28,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:28,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:28,970 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 [2021-11-02 22:36:28,970 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:28,985 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 33 states and 43 transitions. Complement of second has 5 states. [2021-11-02 22:36:28,988 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 [2021-11-02 22:36:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-02 22:36:28,989 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-02 22:36:28,989 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:28,989 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-02 22:36:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:36:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:29,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:36:29,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:29,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:36:29,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 22:36:29,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:36:29,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:36:29,065 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 [2021-11-02 22:36:29,066 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15 Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:29,082 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 25 states and 34 transitions. cyclomatic complexity: 15. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 35 states and 46 transitions. Complement of second has 4 states. [2021-11-02 22:36:29,083 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 [2021-11-02 22:36:29,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 22:36:29,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-11-02 22:36:29,084 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-02 22:36:29,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:29,084 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2021-11-02 22:36:29,084 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:29,084 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 4 letters. [2021-11-02 22:36:29,085 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-02 22:36:29,085 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 46 transitions. [2021-11-02 22:36:29,087 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-02 22:36:29,087 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2021-11-02 22:36:29,087 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-11-02 22:36:29,087 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-11-02 22:36:29,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-11-02 22:36:29,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-02 22:36:29,088 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 22:36:29,088 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 22:36:29,088 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-02 22:36:29,088 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-11-02 22:36:29,088 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-11-02 22:36:29,089 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-02 22:36:29,089 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-11-02 22:36:29,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 02.11 10:36:29 BoogieIcfgContainer [2021-11-02 22:36:29,096 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-02 22:36:29,097 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:36:29,097 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:36:29,097 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:36:29,098 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:36:22" (3/4) ... [2021-11-02 22:36:29,101 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:36:29,102 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:36:29,104 INFO L168 Benchmark]: Toolchain (without parser) took 7116.28 ms. Allocated memory was 88.1 MB in the beginning and 146.8 MB in the end (delta: 58.7 MB). Free memory was 55.8 MB in the beginning and 84.5 MB in the end (delta: -28.7 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:36:29,104 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory is still 43.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:36:29,105 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.84 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 55.5 MB in the beginning and 99.4 MB in the end (delta: -43.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-02 22:36:29,106 INFO L168 Benchmark]: Boogie Procedure Inliner took 36.25 ms. Allocated memory is still 121.6 MB. Free memory was 99.4 MB in the beginning and 98.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:36:29,107 INFO L168 Benchmark]: Boogie Preprocessor took 22.82 ms. Allocated memory is still 121.6 MB. Free memory was 98.1 MB in the beginning and 97.3 MB in the end (delta: 714.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:36:29,108 INFO L168 Benchmark]: RCFGBuilder took 297.78 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 89.7 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-11-02 22:36:29,108 INFO L168 Benchmark]: BuchiAutomizer took 6512.24 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 89.4 MB in the beginning and 85.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:36:29,109 INFO L168 Benchmark]: Witness Printer took 5.04 ms. Allocated memory is still 146.8 MB. Free memory was 85.6 MB in the beginning and 84.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:36:29,111 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 88.1 MB. Free memory is still 43.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 235.84 ms. Allocated memory was 88.1 MB in the beginning and 121.6 MB in the end (delta: 33.6 MB). Free memory was 55.5 MB in the beginning and 99.4 MB in the end (delta: -43.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 36.25 ms. Allocated memory is still 121.6 MB. Free memory was 99.4 MB in the beginning and 98.1 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.82 ms. Allocated memory is still 121.6 MB. Free memory was 98.1 MB in the beginning and 97.3 MB in the end (delta: 714.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 297.78 ms. Allocated memory is still 121.6 MB. Free memory was 97.3 MB in the beginning and 89.7 MB in the end (delta: 7.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6512.24 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 89.4 MB in the beginning and 85.6 MB in the end (delta: 3.8 MB). Peak memory consumption was 31.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.04 ms. Allocated memory is still 146.8 MB. Free memory was 85.6 MB in the beginning and 84.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (1 trivial, 4 deterministic, 2 nondeterministic). One deterministic module has affine ranking function q and consists of 5 locations. One deterministic module has affine ranking function p and consists of 4 locations. One deterministic module has affine ranking function q and consists of 3 locations. One deterministic module has affine ranking function p and consists of 5 locations. One nondeterministic module has affine ranking function p and consists of 4 locations. One nondeterministic module has affine ranking function q and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.4s and 8 iterations. TraceHistogramMax:3. Analysis of lassos took 4.7s. Construction of modules took 0.1s. Büchi inclusion checks took 1.3s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 15 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 25 states and ocurred in iteration 6. Nontrivial modules had stage [3, 1, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/2 HoareTripleCheckerStatistics: 56 SDtfs, 69 SDslu, 9 SDs, 0 SdLazy, 123 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI1 SFLT6 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital20 mio100 ax162 hnf100 lsp62 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq159 hnf93 smp90 dnf100 smp100 tf107 neg98 sie118 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 69ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 6 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2021-11-02 22:36:29,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-11-02 22:36:29,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4b63d965-c10c-4701-b1a4-3193465293f4/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE