./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 f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/Piecewise.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX --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-f8e1c90 [2021-11-09 08:32:31,192 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 08:32:31,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 08:32:31,258 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 08:32:31,259 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 08:32:31,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 08:32:31,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 08:32:31,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 08:32:31,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 08:32:31,280 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 08:32:31,281 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 08:32:31,282 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 08:32:31,283 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 08:32:31,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 08:32:31,285 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 08:32:31,287 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 08:32:31,288 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 08:32:31,289 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 08:32:31,295 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 08:32:31,305 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 08:32:31,308 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 08:32:31,309 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 08:32:31,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 08:32:31,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 08:32:31,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 08:32:31,323 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 08:32:31,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 08:32:31,325 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 08:32:31,326 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 08:32:31,327 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 08:32:31,328 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 08:32:31,329 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 08:32:31,331 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 08:32:31,332 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 08:32:31,333 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 08:32:31,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 08:32:31,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 08:32:31,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 08:32:31,335 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 08:32:31,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 08:32:31,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 08:32:31,337 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-11-09 08:32:31,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 08:32:31,364 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 08:32:31,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 08:32:31,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 08:32:31,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 08:32:31,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 08:32:31,366 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 08:32:31,366 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-11-09 08:32:31,366 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-11-09 08:32:31,367 INFO L138 SettingsManager]: * Use old map elimination=false [2021-11-09 08:32:31,367 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-11-09 08:32:31,367 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-11-09 08:32:31,367 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-11-09 08:32:31,368 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 08:32:31,368 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 08:32:31,368 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 08:32:31,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 08:32:31,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-11-09 08:32:31,369 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-11-09 08:32:31,369 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-11-09 08:32:31,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 08:32:31,369 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-11-09 08:32:31,370 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 08:32:31,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-11-09 08:32:31,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 08:32:31,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 08:32:31,371 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 08:32:31,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 08:32:31,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 08:32:31,372 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-11-09 08:32:31,372 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_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac2fbc3b92c237eee672d002679ee7a51e4ecff20f91c05c8145e18adc82f593 [2021-11-09 08:32:31,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 08:32:31,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 08:32:31,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 08:32:31,660 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 08:32:31,661 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 08:32:31,662 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/termination-crafted/Piecewise.c [2021-11-09 08:32:31,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/data/a36e4bae6/ebafc24b17ed41ffbe5b74666e18ac59/FLAG7d64dd9cf [2021-11-09 08:32:32,274 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 08:32:32,276 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/sv-benchmarks/c/termination-crafted/Piecewise.c [2021-11-09 08:32:32,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/data/a36e4bae6/ebafc24b17ed41ffbe5b74666e18ac59/FLAG7d64dd9cf [2021-11-09 08:32:32,650 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/data/a36e4bae6/ebafc24b17ed41ffbe5b74666e18ac59 [2021-11-09 08:32:32,653 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 08:32:32,654 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 08:32:32,656 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 08:32:32,656 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 08:32:32,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 08:32:32,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d90fac5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32, skipping insertion in model container [2021-11-09 08:32:32,662 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,670 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 08:32:32,690 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 08:32:32,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:32:32,897 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 08:32:32,914 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 08:32:32,927 INFO L208 MainTranslator]: Completed translation [2021-11-09 08:32:32,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32 WrapperNode [2021-11-09 08:32:32,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 08:32:32,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 08:32:32,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 08:32:32,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 08:32:32,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,946 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,965 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 08:32:32,966 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 08:32:32,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 08:32:32,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 08:32:32,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,978 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,978 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,987 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:32,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 08:32:32,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 08:32:32,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 08:32:32,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 08:32:32,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (1/1) ... [2021-11-09 08:32:33,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:33,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:33,033 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:33,055 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-11-09 08:32:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 08:32:33,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 08:32:33,268 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 08:32:33,269 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-09 08:32:33,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:33 BoogieIcfgContainer [2021-11-09 08:32:33,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 08:32:33,275 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-11-09 08:32:33,275 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-11-09 08:32:33,279 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-11-09 08:32:33,280 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 08:32:33,280 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 09.11 08:32:32" (1/3) ... [2021-11-09 08:32:33,281 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@92d3b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 08:32:33, skipping insertion in model container [2021-11-09 08:32:33,282 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 08:32:33,282 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 08:32:32" (2/3) ... [2021-11-09 08:32:33,283 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@92d3b26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 09.11 08:32:33, skipping insertion in model container [2021-11-09 08:32:33,284 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-11-09 08:32:33,284 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:33" (3/3) ... [2021-11-09 08:32:33,285 INFO L389 chiAutomizerObserver]: Analyzing ICFG Piecewise.c [2021-11-09 08:32:33,363 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-11-09 08:32:33,363 INFO L360 BuchiCegarLoop]: Hoare is false [2021-11-09 08:32:33,364 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-11-09 08:32:33,364 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-11-09 08:32:33,364 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-11-09 08:32:33,364 INFO L364 BuchiCegarLoop]: Difference is false [2021-11-09 08:32:33,364 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-11-09 08:32:33,365 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-11-09 08:32:33,379 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) [2021-11-09 08:32:33,398 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:33,398 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:33,398 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:33,407 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-11-09 08:32:33,407 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 08:32:33,408 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-11-09 08:32:33,409 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) [2021-11-09 08:32:33,411 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:33,411 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:33,411 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:33,412 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1] [2021-11-09 08:32:33,412 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 08:32:33,418 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 [2021-11-09 08:32:33,419 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 [2021-11-09 08:32:33,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:33,425 INFO L85 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2021-11-09 08:32:33,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:33,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760545712] [2021-11-09 08:32:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:33,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:33,523 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:33,557 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:33,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:33,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2021-11-09 08:32:33,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:33,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21870466] [2021-11-09 08:32:33,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:33,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:33,588 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:33,606 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:33,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:33,620 INFO L85 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2021-11-09 08:32:33,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:33,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017901239] [2021-11-09 08:32:33,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:33,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:33,631 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:33,642 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:33,796 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:33,797 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:33,797 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:33,797 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:33,797 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 08:32:33,797 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:33,798 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:33,798 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:33,798 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-11-09 08:32:33,798 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:33,799 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:33,832 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:33,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:33,853 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:33,938 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:33,939 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 08:32:33,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:33,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:33,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:33,948 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:33,948 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:33,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-11-09 08:32:33,983 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:33,983 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: [] [2021-11-09 08:32:34,019 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-11-09 08:32:34,026 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:34,027 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:34,044 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:34,045 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: [] [2021-11-09 08:32:34,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,080 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,091 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:34,091 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:34,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-11-09 08:32:34,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,149 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,155 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 08:32:34,155 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:34,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-11-09 08:32:34,219 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 08:32:34,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,221 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:34,221 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:34,222 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:34,222 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:34,222 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 08:32:34,222 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,222 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:34,222 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:34,222 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration1_Loop [2021-11-09 08:32:34,222 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:34,223 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:34,225 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:34,231 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:34,237 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:34,326 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:34,331 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 08:32:34,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,334 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-11-09 08:32:34,340 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 [2021-11-09 08:32:34,350 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:34,350 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:34,350 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:34,350 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:34,356 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 08:32:34,356 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 08:32:34,375 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 08:32:34,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,399 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-11-09 08:32:34,404 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 [2021-11-09 08:32:34,413 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:34,413 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:34,413 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:34,414 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:34,417 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 08:32:34,418 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 08:32:34,449 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 08:32:34,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,471 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-11-09 08:32:34,482 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 [2021-11-09 08:32:34,489 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:34,490 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 08:32:34,490 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:34,490 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:34,490 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:34,492 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 08:32:34,493 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 08:32:34,508 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 08:32:34,512 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-09 08:32:34,512 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-09 08:32:34,514 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:34,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:34,520 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:34,523 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 08:32:34,523 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 08:32:34,524 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 08:32:34,524 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-11-09 08:32:34,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-11-09 08:32:34,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,565 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 08:32:34,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:34,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:34,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:34,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:34,642 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 [2021-11-09 08:32:34,643 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) [2021-11-09 08:32:34,699 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. [2021-11-09 08:32:34,700 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 [2021-11-09 08:32:34,702 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) [2021-11-09 08:32:34,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 19 transitions. [2021-11-09 08:32:34,704 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 2 letters. [2021-11-09 08:32:34,705 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:34,705 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 3 letters. Loop has 2 letters. [2021-11-09 08:32:34,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:34,706 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 19 transitions. Stem has 1 letters. Loop has 4 letters. [2021-11-09 08:32:34,706 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:34,707 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 48 transitions. [2021-11-09 08:32:34,711 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-09 08:32:34,715 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 13 states and 19 transitions. [2021-11-09 08:32:34,716 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-11-09 08:32:34,716 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-11-09 08:32:34,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 19 transitions. [2021-11-09 08:32:34,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 08:32:34,717 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 19 transitions. [2021-11-09 08:32:34,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 19 transitions. [2021-11-09 08:32:34,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-09 08:32:34,746 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) [2021-11-09 08:32:34,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 18 transitions. [2021-11-09 08:32:34,748 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-11-09 08:32:34,748 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 18 transitions. [2021-11-09 08:32:34,748 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-11-09 08:32:34,748 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 18 transitions. [2021-11-09 08:32:34,749 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2021-11-09 08:32:34,749 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:34,749 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:34,750 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2021-11-09 08:32:34,750 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 08:32:34,751 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 [2021-11-09 08:32:34,751 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 [2021-11-09 08:32:34,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2021-11-09 08:32:34,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:34,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958849480] [2021-11-09 08:32:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:34,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:34,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:34,784 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:34,789 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash 44836, now seen corresponding path program 1 times [2021-11-09 08:32:34,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:34,799 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132106487] [2021-11-09 08:32:34,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:34,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:34,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:34,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:34,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:34,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 08:32:34,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132106487] [2021-11-09 08:32:34,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132106487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 08:32:34,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 08:32:34,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 08:32:34,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073196794] [2021-11-09 08:32:34,917 INFO L808 eck$LassoCheckResult]: loop already infeasible [2021-11-09 08:32:34,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 08:32:34,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 08:32:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-09 08:32:34,925 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) [2021-11-09 08:32:34,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 08:32:34,966 INFO L93 Difference]: Finished difference Result 13 states and 16 transitions. [2021-11-09 08:32:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 08:32:34,967 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 16 transitions. [2021-11-09 08:32:34,971 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:34,972 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 9 states and 12 transitions. [2021-11-09 08:32:34,972 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-11-09 08:32:34,973 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-11-09 08:32:34,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-11-09 08:32:34,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 08:32:34,973 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-11-09 08:32:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-11-09 08:32:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2021-11-09 08:32:34,977 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) [2021-11-09 08:32:34,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 11 transitions. [2021-11-09 08:32:34,978 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-09 08:32:34,978 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 11 transitions. [2021-11-09 08:32:34,978 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-11-09 08:32:34,979 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 11 transitions. [2021-11-09 08:32:34,981 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:34,981 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:34,982 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:34,982 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-11-09 08:32:34,982 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 08:32:34,983 INFO L791 eck$LassoCheckResult]: Stem: 114#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 115#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 119#L23 assume !(main_~q~0 < main_~p~0); 121#L26 [2021-11-09 08:32:34,983 INFO L793 eck$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 [2021-11-09 08:32:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:34,984 INFO L85 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2021-11-09 08:32:34,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:34,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207495743] [2021-11-09 08:32:34,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:34,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:35,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:35,013 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:35,019 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:35,025 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 1 times [2021-11-09 08:32:35,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:35,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746674969] [2021-11-09 08:32:35,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:35,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:35,039 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:35,047 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:35,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash 925832530, now seen corresponding path program 1 times [2021-11-09 08:32:35,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:35,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089424139] [2021-11-09 08:32:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:35,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:35,061 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:35,084 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:35,165 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:35,165 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:35,165 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:35,165 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:35,165 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 08:32:35,166 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,166 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:35,166 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:35,166 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-11-09 08:32:35,166 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:35,166 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:35,170 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:35,173 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:35,187 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:35,274 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:35,274 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 08:32:35,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,279 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:35,288 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:35,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2021-11-09 08:32:35,311 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:35,312 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: [] [2021-11-09 08:32:35,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:35,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,358 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:35,358 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:35,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-11-09 08:32:35,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:35,423 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,425 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 08:32:35,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:35,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-11-09 08:32:35,625 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 08:32:35,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:35,630 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:35,630 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:35,630 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:35,630 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:35,630 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 08:32:35,630 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,630 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:35,630 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:35,631 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration3_Loop [2021-11-09 08:32:35,631 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:35,631 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:35,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:35,635 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:35,649 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:35,739 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:35,740 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 08:32:35,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,743 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,748 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 [2021-11-09 08:32:35,757 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:35,757 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:35,757 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:35,757 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:35,760 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 08:32:35,761 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 08:32:35,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-11-09 08:32:35,774 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 08:32:35,810 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Ended with exit code 0 [2021-11-09 08:32:35,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,812 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-11-09 08:32:35,815 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 [2021-11-09 08:32:35,824 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:35,825 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 08:32:35,825 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:35,825 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:35,825 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:35,827 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 08:32:35,827 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 08:32:35,847 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 08:32:35,861 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-09 08:32:35,861 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-09 08:32:35,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:35,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:35,863 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:35,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-11-09 08:32:35,885 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 08:32:35,885 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 08:32:35,885 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 08:32:35,886 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-11-09 08:32:35,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:35,909 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 08:32:35,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:35,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:35,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:35,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:35,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:36,001 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 [2021-11-09 08:32:36,001 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) [2021-11-09 08:32:36,020 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. [2021-11-09 08:32:36,020 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 [2021-11-09 08:32:36,021 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) [2021-11-09 08:32:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-09 08:32:36,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2021-11-09 08:32:36,021 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:36,021 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2021-11-09 08:32:36,022 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:36,022 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2021-11-09 08:32:36,022 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:36,022 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 16 states and 20 transitions. [2021-11-09 08:32:36,023 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:36,023 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 16 states to 13 states and 17 transitions. [2021-11-09 08:32:36,024 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-11-09 08:32:36,024 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-11-09 08:32:36,024 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2021-11-09 08:32:36,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 08:32:36,024 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-11-09 08:32:36,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2021-11-09 08:32:36,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2021-11-09 08:32:36,025 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) [2021-11-09 08:32:36,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-09 08:32:36,026 INFO L704 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-09 08:32:36,026 INFO L587 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-09 08:32:36,026 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-11-09 08:32:36,026 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2021-11-09 08:32:36,027 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:36,027 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:36,027 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:36,027 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1] [2021-11-09 08:32:36,028 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 08:32:36,028 INFO L791 eck$LassoCheckResult]: Stem: 181#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 182#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 186#L23 assume !(main_~q~0 < main_~p~0); 192#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 190#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 191#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 183#L26-2 [2021-11-09 08:32:36,028 INFO L793 eck$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 [2021-11-09 08:32:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash 925832528, now seen corresponding path program 1 times [2021-11-09 08:32:36,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:36,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878176412] [2021-11-09 08:32:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,036 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,044 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2021-11-09 08:32:36,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:36,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526153312] [2021-11-09 08:32:36,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,049 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,086 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,087 INFO L85 PathProgramCache]: Analyzing trace with hash 666829459, now seen corresponding path program 2 times [2021-11-09 08:32:36,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:36,087 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806568177] [2021-11-09 08:32:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:36,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,096 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:36,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,111 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:36,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:36,145 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:36,145 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:36,145 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:36,145 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:36,145 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 08:32:36,146 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,146 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:36,146 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:36,146 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-11-09 08:32:36,146 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:36,146 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:36,147 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,157 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,161 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,211 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:36,211 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 08:32:36,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,213 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,223 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:36,224 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:36,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-11-09 08:32:36,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:36,279 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,283 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,288 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 08:32:36,288 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:36,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-11-09 08:32:36,347 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 08:32:36,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:36,350 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:36,350 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:36,350 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:36,350 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:36,351 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 08:32:36,351 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,351 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:36,351 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:36,351 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration4_Loop [2021-11-09 08:32:36,351 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:36,351 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:36,352 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,360 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,405 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:36,405 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 08:32:36,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,406 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-11-09 08:32:36,415 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 [2021-11-09 08:32:36,424 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:36,424 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 08:32:36,424 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:36,424 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:36,424 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:36,426 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 08:32:36,426 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 08:32:36,439 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 08:32:36,443 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-09 08:32:36,443 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-09 08:32:36,443 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,444 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,450 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 08:32:36,450 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 08:32:36,450 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 08:32:36,450 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-11-09 08:32:36,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-11-09 08:32:36,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:36,487 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 08:32:36,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:36,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:36,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:36,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:36,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:36,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:36,554 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 [2021-11-09 08:32:36,554 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) [2021-11-09 08:32:36,569 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. [2021-11-09 08:32:36,569 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 [2021-11-09 08:32:36,570 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) [2021-11-09 08:32:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-09 08:32:36,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2021-11-09 08:32:36,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:36,570 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-09 08:32:36,570 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:36,571 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 4 letters. [2021-11-09 08:32:36,571 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:36,571 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 34 transitions. [2021-11-09 08:32:36,572 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:36,573 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 23 states and 30 transitions. [2021-11-09 08:32:36,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2021-11-09 08:32:36,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2021-11-09 08:32:36,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2021-11-09 08:32:36,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 08:32:36,574 INFO L681 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2021-11-09 08:32:36,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2021-11-09 08:32:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-11-09 08:32:36,576 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) [2021-11-09 08:32:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 28 transitions. [2021-11-09 08:32:36,577 INFO L704 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-09 08:32:36,577 INFO L587 BuchiCegarLoop]: Abstraction has 21 states and 28 transitions. [2021-11-09 08:32:36,577 INFO L425 BuchiCegarLoop]: ======== Iteration 5============ [2021-11-09 08:32:36,577 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states and 28 transitions. [2021-11-09 08:32:36,578 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2021-11-09 08:32:36,578 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:36,578 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:36,578 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-11-09 08:32:36,578 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2021-11-09 08:32:36,578 INFO L791 eck$LassoCheckResult]: Stem: 265#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 266#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 283#L23 assume !(main_~q~0 < main_~p~0); 281#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 280#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 275#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 267#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 269#L23 assume !(main_~q~0 < main_~p~0); 271#L26 [2021-11-09 08:32:36,579 INFO L793 eck$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 [2021-11-09 08:32:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,579 INFO L85 PathProgramCache]: Analyzing trace with hash 666829461, now seen corresponding path program 3 times [2021-11-09 08:32:36,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:36,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046939198] [2021-11-09 08:32:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,587 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,594 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:36,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,595 INFO L85 PathProgramCache]: Analyzing trace with hash 47414, now seen corresponding path program 2 times [2021-11-09 08:32:36,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:36,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697506471] [2021-11-09 08:32:36,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,601 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:36,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,605 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1292746274, now seen corresponding path program 4 times [2021-11-09 08:32:36,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:36,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068584850] [2021-11-09 08:32:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:36,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,613 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:36,643 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:36,689 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:36,689 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:36,689 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:36,689 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:36,689 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 08:32:36,689 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,689 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:36,689 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:36,689 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-11-09 08:32:36,689 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:36,690 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:36,692 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,699 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,713 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:36,771 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:36,771 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 08:32:36,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,775 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-11-09 08:32:36,790 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:36,791 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:36,809 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:36,809 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: [] [2021-11-09 08:32:36,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:36,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,846 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-11-09 08:32:36,853 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:36,853 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:36,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:36,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:36,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:36,915 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:36,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 08:32:36,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:36,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-11-09 08:32:37,077 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 08:32:37,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:37,080 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:37,080 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:37,080 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:37,080 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:37,080 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 08:32:37,081 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,081 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:37,081 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:37,081 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration5_Loop [2021-11-09 08:32:37,081 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:37,081 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:37,082 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:37,105 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:37,108 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:37,159 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:37,159 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 08:32:37,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:37,164 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:37,173 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 [2021-11-09 08:32:37,182 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:37,182 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 08:32:37,182 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:37,182 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:37,183 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:37,185 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 08:32:37,185 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 08:32:37,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-11-09 08:32:37,198 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 08:32:37,201 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-09 08:32:37,201 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-09 08:32:37,201 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:37,203 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:37,205 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 08:32:37,205 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 08:32:37,205 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 08:32:37,205 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-11-09 08:32:37,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-11-09 08:32:37,234 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2021-11-09 08:32:37,235 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 08:32:37,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:37,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:37,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:37,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:37,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:37,365 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 [2021-11-09 08:32:37,366 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) [2021-11-09 08:32:37,385 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. [2021-11-09 08:32:37,385 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 [2021-11-09 08:32:37,386 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) [2021-11-09 08:32:37,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-09 08:32:37,386 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-09 08:32:37,386 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:37,386 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-09 08:32:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:37,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:37,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:37,507 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 [2021-11-09 08:32:37,508 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) [2021-11-09 08:32:37,533 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. [2021-11-09 08:32:37,533 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 [2021-11-09 08:32:37,534 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) [2021-11-09 08:32:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2021-11-09 08:32:37,534 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-09 08:32:37,534 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:37,535 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-09 08:32:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:37,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:37,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:37,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:37,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:37,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:37,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:37,644 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 [2021-11-09 08:32:37,644 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) [2021-11-09 08:32:37,677 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. [2021-11-09 08:32:37,679 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 [2021-11-09 08:32:37,679 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) [2021-11-09 08:32:37,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 10 transitions. [2021-11-09 08:32:37,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 3 letters. [2021-11-09 08:32:37,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:37,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 11 letters. Loop has 3 letters. [2021-11-09 08:32:37,680 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:37,680 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 10 transitions. Stem has 8 letters. Loop has 6 letters. [2021-11-09 08:32:37,681 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:37,681 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 42 transitions. [2021-11-09 08:32:37,682 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2021-11-09 08:32:37,683 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 25 states and 33 transitions. [2021-11-09 08:32:37,683 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2021-11-09 08:32:37,683 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2021-11-09 08:32:37,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 33 transitions. [2021-11-09 08:32:37,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 08:32:37,683 INFO L681 BuchiCegarLoop]: Abstraction has 25 states and 33 transitions. [2021-11-09 08:32:37,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states and 33 transitions. [2021-11-09 08:32:37,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-11-09 08:32:37,685 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) [2021-11-09 08:32:37,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-11-09 08:32:37,686 INFO L704 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-09 08:32:37,686 INFO L587 BuchiCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-11-09 08:32:37,686 INFO L425 BuchiCegarLoop]: ======== Iteration 6============ [2021-11-09 08:32:37,686 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 21 transitions. [2021-11-09 08:32:37,686 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-11-09 08:32:37,687 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:37,687 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:37,687 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1] [2021-11-09 08:32:37,687 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2021-11-09 08:32:37,687 INFO L791 eck$LassoCheckResult]: Stem: 516#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 517#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 519#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 524#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 522#L23 assume !(main_~q~0 < main_~p~0); 523#L26 [2021-11-09 08:32:37,687 INFO L793 eck$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 [2021-11-09 08:32:37,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,688 INFO L85 PathProgramCache]: Analyzing trace with hash 29863400, now seen corresponding path program 1 times [2021-11-09 08:32:37,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:37,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228963547] [2021-11-09 08:32:37,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:37,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:37,693 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:37,706 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,707 INFO L85 PathProgramCache]: Analyzing trace with hash 45563257, now seen corresponding path program 1 times [2021-11-09 08:32:37,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:37,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547151995] [2021-11-09 08:32:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:37,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:37,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:37,712 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:37,716 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash -974968846, now seen corresponding path program 5 times [2021-11-09 08:32:37,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:37,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668410990] [2021-11-09 08:32:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:37,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:37,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:37,734 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:37,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:37,741 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:37,813 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:37,814 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:37,814 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:37,814 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:37,814 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 08:32:37,814 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,814 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:37,814 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:37,814 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-11-09 08:32:37,814 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:37,814 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:37,816 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:37,821 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:37,824 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:37,900 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:37,900 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 08:32:37,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:37,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:37,903 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:37,903 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:37,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-11-09 08:32:37,924 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:37,924 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: [] [2021-11-09 08:32:37,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2021-11-09 08:32:37,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:37,946 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:37,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-11-09 08:32:37,947 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:37,947 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:37,960 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:37,960 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: [] [2021-11-09 08:32:37,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:37,980 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:37,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:37,981 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:37,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-11-09 08:32:37,984 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:37,984 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:38,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2021-11-09 08:32:38,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:38,021 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:38,025 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 08:32:38,025 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:38,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2021-11-09 08:32:38,223 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 08:32:38,225 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2021-11-09 08:32:38,226 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:38,226 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:38,226 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:38,226 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:38,226 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 08:32:38,226 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,226 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:38,226 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:38,226 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration6_Loop [2021-11-09 08:32:38,226 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:38,226 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:38,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:38,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:38,247 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:38,316 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:38,316 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 08:32:38,316 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:38,317 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:38,319 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 [2021-11-09 08:32:38,328 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:38,328 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:38,328 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:38,329 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:38,331 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-11-09 08:32:38,331 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2021-11-09 08:32:38,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Waiting until timeout for monitored process [2021-11-09 08:32:38,347 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-11-09 08:32:38,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (29)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:38,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:38,387 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:38,392 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 [2021-11-09 08:32:38,402 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:38,402 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 08:32:38,402 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:38,402 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:38,402 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:38,404 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 08:32:38,404 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 08:32:38,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Waiting until timeout for monitored process [2021-11-09 08:32:38,423 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 08:32:38,428 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-11-09 08:32:38,428 INFO L444 ModelExtractionUtils]: 3 out of 6 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-11-09 08:32:38,429 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:38,430 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:38,431 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 08:32:38,431 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 08:32:38,432 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 08:32:38,432 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~p~0) = 1*ULTIMATE.start_main_~p~0 Supporting invariants [] [2021-11-09 08:32:38,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Waiting until timeout for monitored process [2021-11-09 08:32:38,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (30)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:38,469 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 08:32:38,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:38,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:38,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:38,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:32:38,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:38,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:38,594 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 [2021-11-09 08:32:38,594 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) [2021-11-09 08:32:38,617 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. [2021-11-09 08:32:38,617 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 [2021-11-09 08:32:38,618 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) [2021-11-09 08:32:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2021-11-09 08:32:38,618 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 5 letters. Loop has 5 letters. [2021-11-09 08:32:38,618 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:38,618 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-09 08:32:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:38,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 18 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:38,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:38,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 08:32:38,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:38,720 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 [2021-11-09 08:32:38,720 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) [2021-11-09 08:32:38,757 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. [2021-11-09 08:32:38,757 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 [2021-11-09 08:32:38,757 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) [2021-11-09 08:32:38,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2021-11-09 08:32:38,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 5 letters. [2021-11-09 08:32:38,758 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:38,758 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 10 letters. Loop has 5 letters. [2021-11-09 08:32:38,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:38,759 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 5 letters. Loop has 10 letters. [2021-11-09 08:32:38,759 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:38,759 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 44 transitions. [2021-11-09 08:32:38,760 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-09 08:32:38,761 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 26 states and 35 transitions. [2021-11-09 08:32:38,761 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-11-09 08:32:38,761 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2021-11-09 08:32:38,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 35 transitions. [2021-11-09 08:32:38,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-11-09 08:32:38,762 INFO L681 BuchiCegarLoop]: Abstraction has 26 states and 35 transitions. [2021-11-09 08:32:38,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states and 35 transitions. [2021-11-09 08:32:38,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-09 08:32:38,764 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) [2021-11-09 08:32:38,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-11-09 08:32:38,765 INFO L704 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-09 08:32:38,765 INFO L587 BuchiCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-11-09 08:32:38,765 INFO L425 BuchiCegarLoop]: ======== Iteration 7============ [2021-11-09 08:32:38,765 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 25 states and 34 transitions. [2021-11-09 08:32:38,766 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-11-09 08:32:38,766 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-11-09 08:32:38,766 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-11-09 08:32:38,767 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1] [2021-11-09 08:32:38,767 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-11-09 08:32:38,767 INFO L791 eck$LassoCheckResult]: Stem: 695#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_#t~nondet2, main_#t~nondet3, main_~p~0, main_~q~0;havoc main_~p~0;havoc main_~q~0;main_~q~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~p~0 := main_#t~nondet1;havoc main_#t~nondet1; 696#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 698#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 713#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 701#L23 assume !(main_~q~0 < main_~p~0); 702#L26 assume main_~p~0 < main_~q~0;main_~p~0 := main_~p~0 - 1;main_~q~0 := main_#t~nondet3;havoc main_#t~nondet3; 712#L26-2 assume !!((main_~q~0 > 0 && main_~p~0 > 0) && main_~p~0 != main_~q~0); 710#L23 assume main_~q~0 < main_~p~0;main_~q~0 := main_~q~0 - 1;main_~p~0 := main_#t~nondet2;havoc main_#t~nondet2; 709#L26-2 [2021-11-09 08:32:38,767 INFO L793 eck$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 [2021-11-09 08:32:38,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:38,768 INFO L85 PathProgramCache]: Analyzing trace with hash 602336749, now seen corresponding path program 6 times [2021-11-09 08:32:38,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:38,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920713140] [2021-11-09 08:32:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:38,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:38,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:38,775 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:38,802 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:38,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:38,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 3 times [2021-11-09 08:32:38,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:38,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848387716] [2021-11-09 08:32:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:38,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:38,807 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:38,810 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:38,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash -974968848, now seen corresponding path program 7 times [2021-11-09 08:32:38,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 08:32:38,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523701961] [2021-11-09 08:32:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 08:32:38,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 08:32:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:38,818 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-09 08:32:38,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-09 08:32:38,840 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-09 08:32:38,860 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (31)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:38,870 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:38,870 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:38,870 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:38,870 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:38,870 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-11-09 08:32:38,870 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,870 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:38,870 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:38,870 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-11-09 08:32:38,870 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:38,871 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:38,871 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:38,877 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:38,880 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:38,928 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:38,928 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-11-09 08:32:38,928 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:38,929 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:38,934 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:38,934 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:38,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Waiting until timeout for monitored process [2021-11-09 08:32:38,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:38,956 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: [] [2021-11-09 08:32:38,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (32)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:38,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:38,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:38,976 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:38,977 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:38,977 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:38,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Waiting until timeout for monitored process [2021-11-09 08:32:38,992 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2021-11-09 08:32:38,993 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: [] [2021-11-09 08:32:39,012 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (33)] Ended with exit code 0 [2021-11-09 08:32:39,012 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:39,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:39,013 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:39,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Waiting until timeout for monitored process [2021-11-09 08:32:39,014 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-11-09 08:32:39,014 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:39,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (34)] Ended with exit code 0 [2021-11-09 08:32:39,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:39,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:39,044 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:39,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Waiting until timeout for monitored process [2021-11-09 08:32:39,048 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-11-09 08:32:39,048 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-11-09 08:32:39,097 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-11-09 08:32:39,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (35)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:39,100 INFO L210 LassoAnalysis]: Preferences: [2021-11-09 08:32:39,100 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-11-09 08:32:39,100 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-11-09 08:32:39,100 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-11-09 08:32:39,100 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-11-09 08:32:39,100 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:39,100 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-11-09 08:32:39,100 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-11-09 08:32:39,100 INFO L133 ssoRankerPreferences]: Filename of dumped script: Piecewise.c_Iteration7_Loop [2021-11-09 08:32:39,100 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-11-09 08:32:39,100 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-11-09 08:32:39,101 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:39,121 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:39,123 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-11-09 08:32:39,159 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-11-09 08:32:39,159 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-11-09 08:32:39,159 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:39,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:39,160 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:39,172 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 [2021-11-09 08:32:39,181 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-11-09 08:32:39,181 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-11-09 08:32:39,181 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-11-09 08:32:39,181 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-11-09 08:32:39,181 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-11-09 08:32:39,183 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-11-09 08:32:39,183 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-11-09 08:32:39,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Waiting until timeout for monitored process [2021-11-09 08:32:39,199 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-11-09 08:32:39,201 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2021-11-09 08:32:39,202 INFO L444 ModelExtractionUtils]: 3 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2021-11-09 08:32:39,202 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-11-09 08:32:39,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 08:32:39,203 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-11-09 08:32:39,204 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-11-09 08:32:39,205 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-11-09 08:32:39,205 INFO L513 LassoAnalysis]: Proved termination. [2021-11-09 08:32:39,205 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~q~0) = 1*ULTIMATE.start_main_~q~0 Supporting invariants [] [2021-11-09 08:32:39,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Waiting until timeout for monitored process [2021-11-09 08:32:39,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (36)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:39,238 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-11-09 08:32:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:39,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:39,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:39,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:39,301 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 [2021-11-09 08:32:39,301 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) [2021-11-09 08:32:39,314 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. [2021-11-09 08:32:39,314 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 [2021-11-09 08:32:39,314 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) [2021-11-09 08:32:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-09 08:32:39,315 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-09 08:32:39,315 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:39,315 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-09 08:32:39,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:39,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:39,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:39,379 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 [2021-11-09 08:32:39,379 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) [2021-11-09 08:32:39,392 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. [2021-11-09 08:32:39,396 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 [2021-11-09 08:32:39,396 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) [2021-11-09 08:32:39,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-11-09 08:32:39,396 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-09 08:32:39,396 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:39,396 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-11-09 08:32:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 08:32:39,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-09 08:32:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 08:32:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 08:32:39,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 08:32:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 08:32:39,465 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 [2021-11-09 08:32:39,465 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) [2021-11-09 08:32:39,480 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. [2021-11-09 08:32:39,481 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 [2021-11-09 08:32:39,481 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) [2021-11-09 08:32:39,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-11-09 08:32:39,482 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 2 letters. [2021-11-09 08:32:39,482 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:39,482 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 10 letters. Loop has 2 letters. [2021-11-09 08:32:39,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:39,483 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 8 letters. Loop has 4 letters. [2021-11-09 08:32:39,483 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-11-09 08:32:39,483 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 35 states and 46 transitions. [2021-11-09 08:32:39,484 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-09 08:32:39,485 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 35 states to 0 states and 0 transitions. [2021-11-09 08:32:39,485 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2021-11-09 08:32:39,485 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2021-11-09 08:32:39,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2021-11-09 08:32:39,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-11-09 08:32:39,485 INFO L681 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 08:32:39,486 INFO L704 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 08:32:39,486 INFO L587 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-09 08:32:39,486 INFO L425 BuchiCegarLoop]: ======== Iteration 8============ [2021-11-09 08:32:39,486 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2021-11-09 08:32:39,486 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2021-11-09 08:32:39,486 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2021-11-09 08:32:39,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 09.11 08:32:39 BoogieIcfgContainer [2021-11-09 08:32:39,493 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2021-11-09 08:32:39,493 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-09 08:32:39,493 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-09 08:32:39,494 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-09 08:32:39,494 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 08:32:33" (3/4) ... [2021-11-09 08:32:39,497 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-09 08:32:39,497 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-09 08:32:39,498 INFO L168 Benchmark]: Toolchain (without parser) took 6843.13 ms. Allocated memory was 81.8 MB in the beginning and 121.6 MB in the end (delta: 39.8 MB). Free memory was 44.7 MB in the beginning and 62.3 MB in the end (delta: -17.5 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. [2021-11-09 08:32:39,498 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 61.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:32:39,499 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.79 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 44.5 MB in the beginning and 75.4 MB in the end (delta: -30.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-11-09 08:32:39,499 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.73 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 74.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:32:39,500 INFO L168 Benchmark]: Boogie Preprocessor took 22.22 ms. Allocated memory is still 98.6 MB. Free memory was 74.0 MB in the beginning and 73.1 MB in the end (delta: 903.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:32:39,500 INFO L168 Benchmark]: RCFGBuilder took 283.32 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 65.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-09 08:32:39,500 INFO L168 Benchmark]: BuchiAutomizer took 6218.34 ms. Allocated memory was 98.6 MB in the beginning and 121.6 MB in the end (delta: 23.1 MB). Free memory was 65.4 MB in the beginning and 62.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. [2021-11-09 08:32:39,501 INFO L168 Benchmark]: Witness Printer took 3.45 ms. Allocated memory is still 121.6 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-09 08:32:39,502 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 81.8 MB. Free memory is still 61.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 272.79 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 44.5 MB in the beginning and 75.4 MB in the end (delta: -30.9 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.73 ms. Allocated memory is still 98.6 MB. Free memory was 75.4 MB in the beginning and 74.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.22 ms. Allocated memory is still 98.6 MB. Free memory was 74.0 MB in the beginning and 73.1 MB in the end (delta: 903.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 283.32 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 65.4 MB in the end (delta: 7.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * BuchiAutomizer took 6218.34 ms. Allocated memory was 98.6 MB in the beginning and 121.6 MB in the end (delta: 23.1 MB). Free memory was 65.4 MB in the beginning and 62.3 MB in the end (delta: 3.1 MB). Peak memory consumption was 28.3 MB. Max. memory is 16.1 GB. * Witness Printer took 3.45 ms. Allocated memory is still 121.6 MB. Free memory is still 62.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 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 6.1s and 8 iterations. TraceHistogramMax:3. Analysis of lassos took 4.6s. Construction of modules took 0.1s. Büchi inclusion checks took 1.2s. 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: 43ms 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! [2021-11-09 08:32:39,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (37)] Forceful destruction successful, exit code 0 [2021-11-09 08:32:39,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7e041c22-56f3-4547-bc8f-aba0e67b15eb/bin/uautomizer-IVEQpCNsaX/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