./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted/Collatz_bounded.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerTermination.xml -i ../sv-benchmarks/c/termination-crafted/Collatz_bounded.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 fb8f212b8045dc9be8518316cbae752ce6111a4a93244dc89f86b0ea27a978ef --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 09:18:48,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 09:18:48,055 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 09:18:48,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 09:18:48,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 09:18:48,085 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 09:18:48,086 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 09:18:48,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 09:18:48,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 09:18:48,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 09:18:48,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 09:18:48,090 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 09:18:48,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 09:18:48,091 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 09:18:48,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 09:18:48,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 09:18:48,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 09:18:48,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 09:18:48,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 09:18:48,098 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 09:18:48,099 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 09:18:48,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 09:18:48,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 09:18:48,102 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 09:18:48,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 09:18:48,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 09:18:48,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 09:18:48,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 09:18:48,106 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 09:18:48,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 09:18:48,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 09:18:48,107 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 09:18:48,116 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 09:18:48,116 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 09:18:48,117 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 09:18:48,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 09:18:48,118 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 09:18:48,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 09:18:48,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 09:18:48,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 09:18:48,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 09:18:48,120 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2021-12-16 09:18:48,163 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 09:18:48,163 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 09:18:48,163 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 09:18:48,163 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 09:18:48,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 09:18:48,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 09:18:48,164 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 09:18:48,164 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2021-12-16 09:18:48,164 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Use old map elimination=false [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2021-12-16 09:18:48,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2021-12-16 09:18:48,165 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2021-12-16 09:18:48,166 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 09:18:48,166 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 09:18:48,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 09:18:48,167 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-12-16 09:18:48,167 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb8f212b8045dc9be8518316cbae752ce6111a4a93244dc89f86b0ea27a978ef [2021-12-16 09:18:48,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 09:18:48,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 09:18:48,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 09:18:48,436 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 09:18:48,437 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 09:18:48,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted/Collatz_bounded.c [2021-12-16 09:18:48,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4feced243/954af2dcc95b4b47b2807918817623ad/FLAG69ce15ecb [2021-12-16 09:18:48,951 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 09:18:48,969 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted/Collatz_bounded.c [2021-12-16 09:18:48,973 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4feced243/954af2dcc95b4b47b2807918817623ad/FLAG69ce15ecb [2021-12-16 09:18:49,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4feced243/954af2dcc95b4b47b2807918817623ad [2021-12-16 09:18:49,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 09:18:49,380 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 09:18:49,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 09:18:49,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 09:18:49,398 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 09:18:49,399 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,399 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503b1059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49, skipping insertion in model container [2021-12-16 09:18:49,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,404 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 09:18:49,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 09:18:49,577 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:18:49,580 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 09:18:49,596 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 09:18:49,605 INFO L208 MainTranslator]: Completed translation [2021-12-16 09:18:49,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49 WrapperNode [2021-12-16 09:18:49,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 09:18:49,606 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 09:18:49,606 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 09:18:49,606 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 09:18:49,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,615 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,625 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 16 [2021-12-16 09:18:49,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 09:18:49,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 09:18:49,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 09:18:49,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 09:18:49,635 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,635 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,636 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,643 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,643 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 09:18:49,644 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 09:18:49,644 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 09:18:49,645 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 09:18:49,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (1/1) ... [2021-12-16 09:18:49,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:49,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:49,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:49,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2021-12-16 09:18:49,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 09:18:49,695 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 09:18:49,732 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 09:18:49,733 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 09:18:49,830 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 09:18:49,835 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 09:18:49,835 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-16 09:18:49,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:18:49 BoogieIcfgContainer [2021-12-16 09:18:49,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 09:18:49,837 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2021-12-16 09:18:49,837 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2021-12-16 09:18:49,839 INFO L275 PluginConnector]: BuchiAutomizer initialized [2021-12-16 09:18:49,840 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:18:49,840 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.12 09:18:49" (1/3) ... [2021-12-16 09:18:49,841 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@213569e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:18:49, skipping insertion in model container [2021-12-16 09:18:49,841 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:18:49,841 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 09:18:49" (2/3) ... [2021-12-16 09:18:49,842 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@213569e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.12 09:18:49, skipping insertion in model container [2021-12-16 09:18:49,842 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2021-12-16 09:18:49,842 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 09:18:49" (3/3) ... [2021-12-16 09:18:49,843 INFO L388 chiAutomizerObserver]: Analyzing ICFG Collatz_bounded.c [2021-12-16 09:18:49,872 INFO L359 BuchiCegarLoop]: Interprodecural is true [2021-12-16 09:18:49,873 INFO L360 BuchiCegarLoop]: Hoare is false [2021-12-16 09:18:49,873 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2021-12-16 09:18:49,873 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2021-12-16 09:18:49,873 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-12-16 09:18:49,873 INFO L364 BuchiCegarLoop]: Difference is false [2021-12-16 09:18:49,873 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-12-16 09:18:49,873 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2021-12-16 09:18:49,882 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:49,899 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:18:49,900 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:18:49,900 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:18:49,903 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 09:18:49,903 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:18:49,903 INFO L425 BuchiCegarLoop]: ======== Iteration 1============ [2021-12-16 09:18:49,904 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:49,905 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:18:49,905 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:18:49,905 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:18:49,906 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2021-12-16 09:18:49,906 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:18:49,910 INFO L791 eck$LassoCheckResult]: Stem: 6#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 8#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~y~0#1;main_~y~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 9#L14true assume !(main_~y~0#1 >= 113383); 7#L16-2true [2021-12-16 09:18:49,911 INFO L793 eck$LassoCheckResult]: Loop: 7#L16-2true assume !!(main_~y~0#1 > 1); 3#L16true assume 0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); 7#L16-2true [2021-12-16 09:18:49,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:49,917 INFO L85 PathProgramCache]: Analyzing trace with hash 29860, now seen corresponding path program 1 times [2021-12-16 09:18:49,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:49,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386350066] [2021-12-16 09:18:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:49,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:49,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:49,976 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:49,998 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1476, now seen corresponding path program 1 times [2021-12-16 09:18:50,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:50,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254165291] [2021-12-16 09:18:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:50,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,032 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:50,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,048 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:50,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:50,050 INFO L85 PathProgramCache]: Analyzing trace with hash 28695975, now seen corresponding path program 1 times [2021-12-16 09:18:50,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:50,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734989005] [2021-12-16 09:18:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:50,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,067 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,085 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:50,193 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:50,194 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:50,194 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:50,194 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:50,194 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:18:50,194 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,194 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:50,194 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:50,195 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration1_Loop [2021-12-16 09:18:50,195 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:50,195 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:50,205 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:50,294 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:50,295 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:18:50,296 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,309 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2021-12-16 09:18:50,311 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:18:50,311 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:50,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:50,361 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,362 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2021-12-16 09:18:50,365 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:18:50,365 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:50,408 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:18:50,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:50,413 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:50,413 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:50,414 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:50,414 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:50,414 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:18:50,414 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,414 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:50,414 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:50,414 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration1_Loop [2021-12-16 09:18:50,414 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:50,414 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:50,415 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:50,471 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:50,474 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:18:50,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2021-12-16 09:18:50,491 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:50,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:50,497 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:50,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:50,498 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:50,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:18:50,500 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:18:50,500 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:50,515 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:18:50,520 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:18:50,520 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:18:50,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,523 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2021-12-16 09:18:50,560 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:18:50,560 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:18:50,560 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:18:50,561 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 1*ULTIMATE.start_main_~y~0#1 Supporting invariants [] [2021-12-16 09:18:50,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:50,578 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:18:50,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:50,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:50,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:18:50,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:50,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 09:18:50,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:50,666 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 [2021-12-16 09:18:50,668 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:50,693 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 28 states and 35 transitions. Complement of second has 8 states. [2021-12-16 09:18:50,695 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 [2021-12-16 09:18:50,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 16 transitions. [2021-12-16 09:18:50,699 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 2 letters. [2021-12-16 09:18:50,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:50,700 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:18:50,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:50,700 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 16 transitions. Stem has 3 letters. Loop has 4 letters. [2021-12-16 09:18:50,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:50,701 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 35 transitions. [2021-12-16 09:18:50,703 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:18:50,706 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 9 states and 12 transitions. [2021-12-16 09:18:50,706 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-12-16 09:18:50,707 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2021-12-16 09:18:50,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 12 transitions. [2021-12-16 09:18:50,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:18:50,708 INFO L681 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-12-16 09:18:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 12 transitions. [2021-12-16 09:18:50,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-16 09:18:50,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:50,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2021-12-16 09:18:50,724 INFO L704 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-12-16 09:18:50,724 INFO L587 BuchiCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-12-16 09:18:50,725 INFO L425 BuchiCegarLoop]: ======== Iteration 2============ [2021-12-16 09:18:50,725 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 12 transitions. [2021-12-16 09:18:50,725 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:18:50,725 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:18:50,725 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:18:50,726 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2021-12-16 09:18:50,726 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:18:50,726 INFO L791 eck$LassoCheckResult]: Stem: 84#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 85#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~y~0#1;main_~y~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 87#L14 assume !(main_~y~0#1 >= 113383); 88#L16-2 assume !!(main_~y~0#1 > 1); 80#L16 assume !(0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2));main_~y~0#1 := 1 + 3 * main_~y~0#1; 81#L16-2 [2021-12-16 09:18:50,726 INFO L793 eck$LassoCheckResult]: Loop: 81#L16-2 assume !!(main_~y~0#1 > 1); 86#L16 assume 0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); 81#L16-2 [2021-12-16 09:18:50,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash 28695977, now seen corresponding path program 1 times [2021-12-16 09:18:50,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:50,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226659596] [2021-12-16 09:18:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:50,727 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,733 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,737 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1476, now seen corresponding path program 2 times [2021-12-16 09:18:50,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:50,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394914548] [2021-12-16 09:18:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:50,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:50,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,742 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,745 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:50,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:50,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1807030636, now seen corresponding path program 1 times [2021-12-16 09:18:50,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:50,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050116833] [2021-12-16 09:18:50,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:50,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,753 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:50,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:50,759 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:50,777 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:50,778 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:50,778 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:50,778 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:50,778 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:18:50,778 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,778 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:50,778 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:50,778 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration2_Loop [2021-12-16 09:18:50,778 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:50,778 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:50,779 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:50,832 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:50,832 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:18:50,832 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2021-12-16 09:18:50,836 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:18:50,836 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:50,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:50,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,865 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2021-12-16 09:18:50,867 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:18:50,867 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:50,906 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:18:50,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2021-12-16 09:18:50,914 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:50,914 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:50,914 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:50,914 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:50,914 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:18:50,914 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,914 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:50,914 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:50,914 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration2_Loop [2021-12-16 09:18:50,915 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:50,915 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:50,915 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:50,955 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:50,955 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:18:50,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,964 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2021-12-16 09:18:50,973 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:50,979 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:50,979 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:50,979 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:50,979 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:50,979 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:18:50,981 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:18:50,981 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:50,992 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:18:50,994 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:18:50,994 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:18:50,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:50,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:50,996 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:50,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2021-12-16 09:18:50,998 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:18:50,998 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:18:50,998 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:18:50,998 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 1*ULTIMATE.start_main_~y~0#1 Supporting invariants [] [2021-12-16 09:18:51,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:51,050 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:18:51,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,088 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:51,100 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 [2021-12-16 09:18:51,100 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 9 states and 12 transitions. cyclomatic complexity: 5 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) [2021-12-16 09:18:51,108 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 9 states and 12 transitions. cyclomatic complexity: 5. 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 13 states and 18 transitions. Complement of second has 5 states. [2021-12-16 09:18:51,109 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 [2021-12-16 09:18:51,109 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) [2021-12-16 09:18:51,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-12-16 09:18:51,110 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 2 letters. [2021-12-16 09:18:51,110 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,110 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2021-12-16 09:18:51,110 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,110 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 5 letters. Loop has 4 letters. [2021-12-16 09:18:51,110 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,114 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 18 transitions. [2021-12-16 09:18:51,115 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:18:51,115 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 18 transitions. [2021-12-16 09:18:51,115 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2021-12-16 09:18:51,115 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-12-16 09:18:51,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 18 transitions. [2021-12-16 09:18:51,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:18:51,116 INFO L681 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-12-16 09:18:51,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 18 transitions. [2021-12-16 09:18:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-12-16 09:18:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:51,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 18 transitions. [2021-12-16 09:18:51,117 INFO L704 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-12-16 09:18:51,117 INFO L587 BuchiCegarLoop]: Abstraction has 13 states and 18 transitions. [2021-12-16 09:18:51,117 INFO L425 BuchiCegarLoop]: ======== Iteration 3============ [2021-12-16 09:18:51,117 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 18 transitions. [2021-12-16 09:18:51,118 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2021-12-16 09:18:51,118 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:18:51,118 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:18:51,118 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1] [2021-12-16 09:18:51,125 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2021-12-16 09:18:51,126 INFO L791 eck$LassoCheckResult]: Stem: 148#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 149#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~y~0#1;main_~y~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 152#L14 assume !(main_~y~0#1 >= 113383); 153#L16-2 assume !!(main_~y~0#1 > 1); 144#L16 assume !(0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2));main_~y~0#1 := 1 + 3 * main_~y~0#1; 145#L16-2 assume !!(main_~y~0#1 > 1); 154#L16 assume !(0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2));main_~y~0#1 := 1 + 3 * main_~y~0#1; 150#L16-2 [2021-12-16 09:18:51,126 INFO L793 eck$LassoCheckResult]: Loop: 150#L16-2 assume !!(main_~y~0#1 > 1); 151#L16 assume 0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); 150#L16-2 [2021-12-16 09:18:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1807030638, now seen corresponding path program 2 times [2021-12-16 09:18:51,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:51,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622107698] [2021-12-16 09:18:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:51,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:51,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 09:18:51,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622107698] [2021-12-16 09:18:51,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622107698] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 09:18:51,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981761146] [2021-12-16 09:18:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 09:18:51,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 09:18:51,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,216 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 09:18:51,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 09:18:51,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 09:18:51,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2021-12-16 09:18:51,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:51,363 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 09:18:51,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981761146] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 09:18:51,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 09:18:51,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2021-12-16 09:18:51,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044919584] [2021-12-16 09:18:51,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 09:18:51,366 INFO L796 eck$LassoCheckResult]: stem already infeasible [2021-12-16 09:18:51,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1476, now seen corresponding path program 3 times [2021-12-16 09:18:51,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:51,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432006326] [2021-12-16 09:18:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:51,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,374 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,392 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:51,409 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:51,410 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:51,410 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:51,410 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:51,410 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:18:51,410 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,410 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:51,410 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:51,410 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration3_Loop [2021-12-16 09:18:51,410 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:51,411 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:51,411 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:51,451 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:51,451 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:18:51,451 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,458 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2021-12-16 09:18:51,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:18:51,460 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:51,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:51,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,489 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2021-12-16 09:18:51,492 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:18:51,492 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:51,530 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:18:51,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:51,533 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:51,533 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:51,533 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:51,533 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:51,533 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:18:51,533 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,533 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:51,534 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:51,534 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration3_Loop [2021-12-16 09:18:51,534 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:51,534 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:51,534 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:51,570 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:51,570 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:18:51,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,586 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2021-12-16 09:18:51,588 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:51,595 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:51,595 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:51,595 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:51,595 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:51,595 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:18:51,596 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:18:51,596 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:51,598 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2021-12-16 09:18:51,602 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2021-12-16 09:18:51,602 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2021-12-16 09:18:51,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,603 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2021-12-16 09:18:51,605 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2021-12-16 09:18:51,605 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2021-12-16 09:18:51,605 INFO L513 LassoAnalysis]: Proved termination. [2021-12-16 09:18:51,605 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~y~0#1) = 1*ULTIMATE.start_main_~y~0#1 Supporting invariants [] [2021-12-16 09:18:51,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:51,632 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2021-12-16 09:18:51,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,658 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:51,669 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 [2021-12-16 09:18:51,669 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 8 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) [2021-12-16 09:18:51,676 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 8. 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 15 states and 22 transitions. Complement of second has 5 states. [2021-12-16 09:18:51,677 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 [2021-12-16 09:18:51,677 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) [2021-12-16 09:18:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-12-16 09:18:51,678 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2021-12-16 09:18:51,678 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,678 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 09:18:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,702 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:51,712 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 [2021-12-16 09:18:51,712 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 8 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) [2021-12-16 09:18:51,718 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 8. 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 15 states and 22 transitions. Complement of second has 5 states. [2021-12-16 09:18:51,719 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 [2021-12-16 09:18:51,719 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) [2021-12-16 09:18:51,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2021-12-16 09:18:51,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 7 letters. Loop has 2 letters. [2021-12-16 09:18:51,720 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,720 INFO L634 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2021-12-16 09:18:51,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 13 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 09:18:51,742 WARN L261 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 09:18:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 09:18:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 09:18:51,751 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 [2021-12-16 09:18:51,752 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 8 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) [2021-12-16 09:18:51,759 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 18 transitions. cyclomatic complexity: 8. 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 17 states and 25 transitions. Complement of second has 4 states. [2021-12-16 09:18:51,759 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 [2021-12-16 09:18:51,760 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) [2021-12-16 09:18:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2021-12-16 09:18:51,760 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 2 letters. [2021-12-16 09:18:51,760 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,761 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 9 letters. Loop has 2 letters. [2021-12-16 09:18:51,761 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,761 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 7 letters. Loop has 4 letters. [2021-12-16 09:18:51,761 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2021-12-16 09:18:51,761 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 17 states and 25 transitions. [2021-12-16 09:18:51,762 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:18:51,762 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 17 states to 15 states and 21 transitions. [2021-12-16 09:18:51,762 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2021-12-16 09:18:51,762 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2021-12-16 09:18:51,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 21 transitions. [2021-12-16 09:18:51,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:18:51,763 INFO L681 BuchiCegarLoop]: Abstraction has 15 states and 21 transitions. [2021-12-16 09:18:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states and 21 transitions. [2021-12-16 09:18:51,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 7. [2021-12-16 09:18:51,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:51,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 9 transitions. [2021-12-16 09:18:51,764 INFO L704 BuchiCegarLoop]: Abstraction has 7 states and 9 transitions. [2021-12-16 09:18:51,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 09:18:51,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 09:18:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 09:18:51,767 INFO L87 Difference]: Start difference. First operand 7 states and 9 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 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) [2021-12-16 09:18:51,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 09:18:51,782 INFO L93 Difference]: Finished difference Result 11 states and 14 transitions. [2021-12-16 09:18:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 09:18:51,783 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 14 transitions. [2021-12-16 09:18:51,783 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2021-12-16 09:18:51,783 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 10 states and 13 transitions. [2021-12-16 09:18:51,783 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2021-12-16 09:18:51,783 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2021-12-16 09:18:51,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 13 transitions. [2021-12-16 09:18:51,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2021-12-16 09:18:51,784 INFO L681 BuchiCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-12-16 09:18:51,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 13 transitions. [2021-12-16 09:18:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 8. [2021-12-16 09:18:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 8 states have (on average 1.25) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 09:18:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2021-12-16 09:18:51,785 INFO L704 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-16 09:18:51,785 INFO L587 BuchiCegarLoop]: Abstraction has 8 states and 10 transitions. [2021-12-16 09:18:51,785 INFO L425 BuchiCegarLoop]: ======== Iteration 4============ [2021-12-16 09:18:51,785 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 10 transitions. [2021-12-16 09:18:51,785 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2021-12-16 09:18:51,785 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2021-12-16 09:18:51,786 INFO L119 BuchiIsEmpty]: Starting construction of run [2021-12-16 09:18:51,786 INFO L842 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1] [2021-12-16 09:18:51,786 INFO L843 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1] [2021-12-16 09:18:51,786 INFO L791 eck$LassoCheckResult]: Stem: 358#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 359#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet0#1, main_~y~0#1;main_~y~0#1 := main_#t~nondet0#1;havoc main_#t~nondet0#1; 360#L14 assume !(main_~y~0#1 >= 113383); 361#L16-2 assume !!(main_~y~0#1 > 1); 354#L16 [2021-12-16 09:18:51,786 INFO L793 eck$LassoCheckResult]: Loop: 354#L16 assume !(0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2));main_~y~0#1 := 1 + 3 * main_~y~0#1; 355#L16-2 assume !!(main_~y~0#1 > 1); 356#L16 assume 0 == (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then main_~y~0#1 % 2 - 2 else main_~y~0#1 % 2);main_~y~0#1 := (if main_~y~0#1 < 0 && 0 != main_~y~0#1 % 2 then 1 + main_~y~0#1 / 2 else main_~y~0#1 / 2); 357#L16-2 assume !!(main_~y~0#1 > 1); 354#L16 [2021-12-16 09:18:51,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,786 INFO L85 PathProgramCache]: Analyzing trace with hash 925676, now seen corresponding path program 1 times [2021-12-16 09:18:51,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:51,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819836555] [2021-12-16 09:18:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:51,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,789 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,791 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:51,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1565113, now seen corresponding path program 1 times [2021-12-16 09:18:51,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:51,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001852354] [2021-12-16 09:18:51,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:51,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,797 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,801 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:51,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 09:18:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 183374884, now seen corresponding path program 2 times [2021-12-16 09:18:51,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 09:18:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20053524] [2021-12-16 09:18:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 09:18:51,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 09:18:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,807 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 09:18:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 09:18:51,812 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 09:18:51,847 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:51,847 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:51,847 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:51,848 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:51,848 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:18:51,848 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,848 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:51,848 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:51,848 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration4_Loop [2021-12-16 09:18:51,848 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:51,848 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:51,849 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:51,895 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:51,895 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:18:51,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,912 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2021-12-16 09:18:51,914 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:18:51,914 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:51,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:51,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:51,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:51,949 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:51,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Waiting until timeout for monitored process [2021-12-16 09:18:51,951 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:18:51,951 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:52,047 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2021-12-16 09:18:52,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (16)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,051 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:52,051 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:52,051 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:52,051 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:52,051 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2021-12-16 09:18:52,051 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,051 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:52,051 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:52,052 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration4_Loop [2021-12-16 09:18:52,052 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:52,052 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:52,052 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:52,096 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:52,096 INFO L490 LassoAnalysis]: Using template 'affine'. [2021-12-16 09:18:52,096 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,110 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2021-12-16 09:18:52,115 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,121 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:52,121 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,121 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,121 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,121 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2021-12-16 09:18:52,123 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2021-12-16 09:18:52,123 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,124 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,173 INFO L490 LassoAnalysis]: Using template '2-nested'. [2021-12-16 09:18:52,173 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,174 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2021-12-16 09:18:52,176 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,182 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:52,183 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,183 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,183 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,183 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-12-16 09:18:52,185 INFO L401 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2021-12-16 09:18:52,185 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,208 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,242 INFO L490 LassoAnalysis]: Using template '3-nested'. [2021-12-16 09:18:52,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2021-12-16 09:18:52,249 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,255 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:52,255 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,256 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,256 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,256 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-12-16 09:18:52,259 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-12-16 09:18:52,259 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,264 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,284 INFO L490 LassoAnalysis]: Using template '4-nested'. [2021-12-16 09:18:52,284 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,285 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2021-12-16 09:18:52,288 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,295 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2021-12-16 09:18:52,295 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,295 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,295 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,295 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-12-16 09:18:52,298 INFO L401 nArgumentSynthesizer]: We have 5 Motzkin's Theorem applications. [2021-12-16 09:18:52,298 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,308 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,324 INFO L490 LassoAnalysis]: Using template '2-phase'. [2021-12-16 09:18:52,324 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,325 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2021-12-16 09:18:52,328 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,334 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-12-16 09:18:52,334 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-12-16 09:18:52,334 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,334 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,334 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,334 INFO L205 nArgumentSynthesizer]: 3 template conjuncts. [2021-12-16 09:18:52,337 INFO L401 nArgumentSynthesizer]: We have 3 Motzkin's Theorem applications. [2021-12-16 09:18:52,337 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,352 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,368 INFO L490 LassoAnalysis]: Using template '3-phase'. [2021-12-16 09:18:52,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,384 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2021-12-16 09:18:52,388 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,395 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-12-16 09:18:52,395 INFO L338 nArgumentSynthesizer]: Template has degree 2. [2021-12-16 09:18:52,395 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,395 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,395 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,395 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-12-16 09:18:52,400 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-12-16 09:18:52,400 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,426 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,442 INFO L490 LassoAnalysis]: Using template '4-phase'. [2021-12-16 09:18:52,442 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,448 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2021-12-16 09:18:52,451 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,458 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-12-16 09:18:52,458 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-12-16 09:18:52,458 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,458 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,458 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,458 INFO L205 nArgumentSynthesizer]: 5 template conjuncts. [2021-12-16 09:18:52,463 INFO L401 nArgumentSynthesizer]: We have 5 Motzkin's Theorem applications. [2021-12-16 09:18:52,463 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,491 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,506 INFO L490 LassoAnalysis]: Using template '2-lex'. [2021-12-16 09:18:52,507 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,507 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2021-12-16 09:18:52,510 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,516 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-12-16 09:18:52,516 INFO L338 nArgumentSynthesizer]: Template has degree 1. [2021-12-16 09:18:52,516 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,516 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,516 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,516 INFO L205 nArgumentSynthesizer]: 4 template conjuncts. [2021-12-16 09:18:52,519 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2021-12-16 09:18:52,519 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,534 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,552 INFO L490 LassoAnalysis]: Using template '3-lex'. [2021-12-16 09:18:52,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,553 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2021-12-16 09:18:52,556 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2021-12-16 09:18:52,563 WARN L333 nArgumentSynthesizer]: Using a linear SMT query and a templates of degree > 0, hence this method is incomplete. [2021-12-16 09:18:52,563 INFO L338 nArgumentSynthesizer]: Template has degree 3. [2021-12-16 09:18:52,563 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2021-12-16 09:18:52,563 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2021-12-16 09:18:52,563 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2021-12-16 09:18:52,563 INFO L205 nArgumentSynthesizer]: 6 template conjuncts. [2021-12-16 09:18:52,568 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2021-12-16 09:18:52,568 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2021-12-16 09:18:52,580 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2021-12-16 09:18:52,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,607 INFO L210 LassoAnalysis]: Preferences: [2021-12-16 09:18:52,607 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2021-12-16 09:18:52,607 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2021-12-16 09:18:52,607 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2021-12-16 09:18:52,607 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2021-12-16 09:18:52,607 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,607 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2021-12-16 09:18:52,607 INFO L132 ssoRankerPreferences]: Path of dumped script: [2021-12-16 09:18:52,607 INFO L133 ssoRankerPreferences]: Filename of dumped script: Collatz_bounded.c_Iteration4_Lasso [2021-12-16 09:18:52,607 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2021-12-16 09:18:52,607 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2021-12-16 09:18:52,608 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:52,615 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:52,616 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2021-12-16 09:18:52,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,701 INFO L294 LassoAnalysis]: Preprocessing complete. [2021-12-16 09:18:52,701 INFO L404 LassoAnalysis]: Checking for nontermination... [2021-12-16 09:18:52,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,702 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,728 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2021-12-16 09:18:52,728 INFO L160 nArgumentSynthesizer]: Using integer mode. [2021-12-16 09:18:52,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2021-12-16 09:18:52,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2021-12-16 09:18:52,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2021-12-16 09:18:52,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 09:18:52,764 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2021-12-16 09:18:52,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2021-12-16 09:18:52,766 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2021-12-16 09:18:52,766 INFO L160 nArgumentSynthesizer]: Using integer mode.