./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/loop-invgen/nested6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 9a8b2e8d 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_1.3.100.v20150511-1540.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/loop-invgen/nested6.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-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 32bit --witnessprinter.graph.data.programhash b3a725921be8310e882457f7f33c9ff7dbee0bc2 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 07:06:19,832 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 07:06:19,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 07:06:19,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 07:06:19,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 07:06:19,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 07:06:19,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 07:06:19,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 07:06:19,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 07:06:19,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 07:06:19,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 07:06:19,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 07:06:19,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 07:06:19,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 07:06:19,869 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 07:06:19,870 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 07:06:19,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 07:06:19,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 07:06:19,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 07:06:19,875 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 07:06:19,876 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 07:06:19,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 07:06:19,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 07:06:19,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 07:06:19,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 07:06:19,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 07:06:19,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 07:06:19,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 07:06:19,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 07:06:19,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 07:06:19,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 07:06:19,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 07:06:19,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 07:06:19,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 07:06:19,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 07:06:19,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 07:06:19,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 07:06:19,889 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 07:06:19,889 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 07:06:19,890 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 07:06:19,891 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 07:06:19,892 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-32bit-Automizer_Default.epf [2020-10-20 07:06:19,950 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 07:06:19,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 07:06:19,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 07:06:19,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 07:06:19,955 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 07:06:19,955 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 07:06:19,955 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 07:06:19,955 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 07:06:19,955 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 07:06:19,956 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 07:06:19,956 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 07:06:19,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 07:06:19,956 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 07:06:19,956 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 07:06:19,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 07:06:19,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 07:06:19,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 07:06:19,958 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 07:06:19,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 07:06:19,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 07:06:19,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 07:06:19,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 07:06:19,959 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 07:06:19,959 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 07:06:19,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 07:06:19,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 07:06:19,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 07:06:19,960 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 07:06:19,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 07:06:19,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 07:06:19,960 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 07:06:19,961 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 07:06:19,961 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 07:06:19,962 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR 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 -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3a725921be8310e882457f7f33c9ff7dbee0bc2 [2020-10-20 07:06:20,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 07:06:20,196 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 07:06:20,204 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 07:06:20,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 07:06:20,206 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 07:06:20,208 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/nested6.i [2020-10-20 07:06:20,279 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130d6c8f7/7acf7013daa040758c0c8e3daac7b16f/FLAG5735c3b16 [2020-10-20 07:06:20,814 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 07:06:20,815 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/nested6.i [2020-10-20 07:06:20,822 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130d6c8f7/7acf7013daa040758c0c8e3daac7b16f/FLAG5735c3b16 [2020-10-20 07:06:21,231 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/130d6c8f7/7acf7013daa040758c0c8e3daac7b16f [2020-10-20 07:06:21,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 07:06:21,241 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 07:06:21,242 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 07:06:21,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 07:06:21,248 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 07:06:21,249 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42343282 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21, skipping insertion in model container [2020-10-20 07:06:21,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,262 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 07:06:21,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 07:06:21,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 07:06:21,457 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 07:06:21,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 07:06:21,504 INFO L208 MainTranslator]: Completed translation [2020-10-20 07:06:21,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21 WrapperNode [2020-10-20 07:06:21,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 07:06:21,506 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 07:06:21,506 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 07:06:21,506 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 07:06:21,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,525 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,547 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 07:06:21,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 07:06:21,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 07:06:21,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 07:06:21,555 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,567 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,569 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... [2020-10-20 07:06:21,571 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 07:06:21,572 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 07:06:21,572 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 07:06:21,572 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 07:06:21,573 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 07:06:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 07:06:21,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 07:06:21,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 07:06:21,886 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 07:06:21,886 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-20 07:06:21,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 07:06:21 BoogieIcfgContainer [2020-10-20 07:06:21,889 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 07:06:21,889 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 07:06:21,890 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 07:06:21,893 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 07:06:21,894 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 07:06:21,895 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 07:06:21" (1/3) ... [2020-10-20 07:06:21,896 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3692208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 07:06:21, skipping insertion in model container [2020-10-20 07:06:21,896 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 07:06:21,896 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 07:06:21" (2/3) ... [2020-10-20 07:06:21,897 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@3692208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 07:06:21, skipping insertion in model container [2020-10-20 07:06:21,897 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 07:06:21,897 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 07:06:21" (3/3) ... [2020-10-20 07:06:21,899 INFO L373 chiAutomizerObserver]: Analyzing ICFG nested6.i [2020-10-20 07:06:21,988 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 07:06:21,989 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 07:06:21,989 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 07:06:21,989 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 07:06:21,989 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 07:06:21,990 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 07:06:21,990 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 07:06:21,990 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 07:06:22,008 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states. [2020-10-20 07:06:22,035 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-20 07:06:22,036 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:22,036 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:22,044 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 07:06:22,044 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:06:22,044 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 07:06:22,045 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states. [2020-10-20 07:06:22,048 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 20 [2020-10-20 07:06:22,049 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:22,049 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:22,049 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 07:06:22,050 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:06:22,059 INFO L794 eck$LassoCheckResult]: Stem: 28#ULTIMATE.startENTRYtrue #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 10#L-1true havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 22#L28true assume !!(main_~n~0 < 1000000); 8#L29true assume main_~k~0 == main_~n~0; 6#L29-1true main_~i~0 := 0; 9#L33-3true [2020-10-20 07:06:22,060 INFO L796 eck$LassoCheckResult]: Loop: 9#L33-3true assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 13#L34-2true assume !true; 27#L33-2true main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 9#L33-3true [2020-10-20 07:06:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:22,067 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 1 times [2020-10-20 07:06:22,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:22,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422535488] [2020-10-20 07:06:22,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:22,196 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:22,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:22,211 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:22,239 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:22,240 INFO L82 PathProgramCache]: Analyzing trace with hash 54167, now seen corresponding path program 1 times [2020-10-20 07:06:22,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:22,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804802822] [2020-10-20 07:06:22,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:22,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:22,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804802822] [2020-10-20 07:06:22,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 07:06:22,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 07:06:22,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653537224] [2020-10-20 07:06:22,286 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 07:06:22,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 07:06:22,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 07:06:22,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 07:06:22,302 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-20 07:06:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 07:06:22,310 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-10-20 07:06:22,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 07:06:22,312 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 26 states and 31 transitions. [2020-10-20 07:06:22,315 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-20 07:06:22,319 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 26 states to 16 states and 19 transitions. [2020-10-20 07:06:22,321 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-20 07:06:22,321 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-20 07:06:22,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 19 transitions. [2020-10-20 07:06:22,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 07:06:22,322 INFO L691 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-20 07:06:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states and 19 transitions. [2020-10-20 07:06:22,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-20 07:06:22,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-20 07:06:22,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-10-20 07:06:22,349 INFO L714 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-20 07:06:22,349 INFO L594 BuchiCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-10-20 07:06:22,350 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 07:06:22,350 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states and 19 transitions. [2020-10-20 07:06:22,351 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2020-10-20 07:06:22,351 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:22,351 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:22,352 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1] [2020-10-20 07:06:22,352 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:06:22,352 INFO L794 eck$LassoCheckResult]: Stem: 76#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 73#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 67#L28 assume !!(main_~n~0 < 1000000); 68#L29 assume main_~k~0 == main_~n~0; 69#L29-1 main_~i~0 := 0; 70#L33-3 [2020-10-20 07:06:22,352 INFO L796 eck$LassoCheckResult]: Loop: 70#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 72#L34-2 assume !(main_~j~0 < main_~n~0); 74#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 70#L33-3 [2020-10-20 07:06:22,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:22,353 INFO L82 PathProgramCache]: Analyzing trace with hash 28695784, now seen corresponding path program 2 times [2020-10-20 07:06:22,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:22,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194559715] [2020-10-20 07:06:22,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:22,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:22,377 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:22,381 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:22,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:22,382 INFO L82 PathProgramCache]: Analyzing trace with hash 51904, now seen corresponding path program 1 times [2020-10-20 07:06:22,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:22,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027417936] [2020-10-20 07:06:22,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:22,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:22,389 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:22,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:22,394 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:22,396 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:22,397 INFO L82 PathProgramCache]: Analyzing trace with hash 177631353, now seen corresponding path program 1 times [2020-10-20 07:06:22,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:22,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23210049] [2020-10-20 07:06:22,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:22,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23210049] [2020-10-20 07:06:22,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 07:06:22,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 07:06:22,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107580889] [2020-10-20 07:06:22,504 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:22,505 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:22,505 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:22,506 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:22,506 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:06:22,506 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:22,506 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:22,506 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:22,506 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2020-10-20 07:06:22,507 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:22,507 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:22,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:22,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:22,634 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:22,635 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:22,645 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:22,645 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:22,654 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:06:22,655 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post5=0} Honda state: {ULTIMATE.start_main_#t~post5=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:22,685 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:22,685 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:22,726 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:06:22,726 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:22,957 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 07:06:22,959 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:22,960 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:22,960 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:22,960 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:22,960 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 07:06:22,960 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:22,960 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:22,961 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:22,961 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration2_Loop [2020-10-20 07:06:22,961 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:22,961 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:22,962 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:22,966 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:23,017 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:23,023 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:23,042 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:23,045 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:23,046 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:23,046 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:23,046 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:23,047 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:23,049 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:23,049 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:23,057 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:23,114 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:23,116 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:23,117 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:23,117 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:23,117 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:23,117 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:23,122 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:23,123 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:06:23,131 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 07:06:23,139 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-20 07:06:23,139 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:23,171 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 07:06:23,171 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 07:06:23,171 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 07:06:23,172 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2020-10-20 07:06:23,215 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 07:06:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:23,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:23,299 WARN L261 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:23,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:23,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:23,322 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 [2020-10-20 07:06:23,324 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-20 07:06:23,387 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states and 19 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 28 states and 36 transitions. Complement of second has 4 states. [2020-10-20 07:06:23,388 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 [2020-10-20 07:06:23,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:23,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 19 transitions. [2020-10-20 07:06:23,391 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 3 letters. [2020-10-20 07:06:23,392 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:23,393 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-20 07:06:23,393 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:23,393 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 19 transitions. Stem has 5 letters. Loop has 6 letters. [2020-10-20 07:06:23,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:23,394 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 28 states and 36 transitions. [2020-10-20 07:06:23,396 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-20 07:06:23,397 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 28 states to 27 states and 34 transitions. [2020-10-20 07:06:23,397 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2020-10-20 07:06:23,397 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-20 07:06:23,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 34 transitions. [2020-10-20 07:06:23,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:23,398 INFO L691 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 07:06:23,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 34 transitions. [2020-10-20 07:06:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-20 07:06:23,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-20 07:06:23,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 33 transitions. [2020-10-20 07:06:23,402 INFO L714 BuchiCegarLoop]: Abstraction has 26 states and 33 transitions. [2020-10-20 07:06:23,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 07:06:23,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 07:06:23,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 07:06:23,403 INFO L87 Difference]: Start difference. First operand 26 states and 33 transitions. Second operand 4 states. [2020-10-20 07:06:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 07:06:23,454 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2020-10-20 07:06:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 07:06:23,455 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 47 states and 59 transitions. [2020-10-20 07:06:23,457 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 18 [2020-10-20 07:06:23,458 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 47 states to 47 states and 59 transitions. [2020-10-20 07:06:23,458 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2020-10-20 07:06:23,459 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 25 [2020-10-20 07:06:23,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 59 transitions. [2020-10-20 07:06:23,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:23,459 INFO L691 BuchiCegarLoop]: Abstraction has 47 states and 59 transitions. [2020-10-20 07:06:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states and 59 transitions. [2020-10-20 07:06:23,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 27. [2020-10-20 07:06:23,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-20 07:06:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2020-10-20 07:06:23,477 INFO L714 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 07:06:23,478 INFO L594 BuchiCegarLoop]: Abstraction has 27 states and 34 transitions. [2020-10-20 07:06:23,478 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 07:06:23,479 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 27 states and 34 transitions. [2020-10-20 07:06:23,480 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2020-10-20 07:06:23,481 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:23,481 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:23,481 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-20 07:06:23,481 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2020-10-20 07:06:23,481 INFO L794 eck$LassoCheckResult]: Stem: 252#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 247#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 236#L28 assume !!(main_~n~0 < 1000000); 237#L29 assume main_~k~0 == main_~n~0; 238#L29-1 main_~i~0 := 0; 239#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 243#L34-2 [2020-10-20 07:06:23,482 INFO L796 eck$LassoCheckResult]: Loop: 243#L34-2 assume !!(main_~j~0 < main_~n~0); 250#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 233#L36-2 assume !(main_~k~0 < main_~n~0); 248#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 243#L34-2 [2020-10-20 07:06:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:23,483 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 1 times [2020-10-20 07:06:23,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:23,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326654066] [2020-10-20 07:06:23,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,512 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,523 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,527 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:23,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:23,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1850272, now seen corresponding path program 1 times [2020-10-20 07:06:23,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:23,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90769018] [2020-10-20 07:06:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:23,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:23,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90769018] [2020-10-20 07:06:23,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 07:06:23,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 07:06:23,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268522510] [2020-10-20 07:06:23,551 INFO L811 eck$LassoCheckResult]: loop already infeasible [2020-10-20 07:06:23,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 07:06:23,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 07:06:23,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 07:06:23,552 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. cyclomatic complexity: 9 Second operand 4 states. [2020-10-20 07:06:23,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 07:06:23,599 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2020-10-20 07:06:23,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 07:06:23,600 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 36 transitions. [2020-10-20 07:06:23,601 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 07:06:23,602 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 36 transitions. [2020-10-20 07:06:23,602 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-20 07:06:23,602 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 16 [2020-10-20 07:06:23,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 36 transitions. [2020-10-20 07:06:23,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:23,603 INFO L691 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-20 07:06:23,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 36 transitions. [2020-10-20 07:06:23,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-20 07:06:23,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-20 07:06:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2020-10-20 07:06:23,607 INFO L714 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-20 07:06:23,607 INFO L594 BuchiCegarLoop]: Abstraction has 29 states and 36 transitions. [2020-10-20 07:06:23,607 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 07:06:23,607 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 36 transitions. [2020-10-20 07:06:23,608 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2020-10-20 07:06:23,609 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:23,609 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:23,609 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1] [2020-10-20 07:06:23,610 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-20 07:06:23,610 INFO L794 eck$LassoCheckResult]: Stem: 315#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 311#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 301#L28 assume !!(main_~n~0 < 1000000); 302#L29 assume main_~k~0 == main_~n~0; 303#L29-1 main_~i~0 := 0; 304#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 308#L34-2 [2020-10-20 07:06:23,610 INFO L796 eck$LassoCheckResult]: Loop: 308#L34-2 assume !!(main_~j~0 < main_~n~0); 316#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 293#L18-3 assume !(0 == __VERIFIER_assert_~cond); 294#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 318#L18-6 assume !(0 == __VERIFIER_assert_~cond); 313#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 308#L34-2 [2020-10-20 07:06:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:23,611 INFO L82 PathProgramCache]: Analyzing trace with hash 889569326, now seen corresponding path program 2 times [2020-10-20 07:06:23,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:23,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398438044] [2020-10-20 07:06:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,623 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,632 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,643 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:23,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:23,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1807888138, now seen corresponding path program 1 times [2020-10-20 07:06:23,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:23,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199774132] [2020-10-20 07:06:23,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,661 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,664 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:23,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:23,665 INFO L82 PathProgramCache]: Analyzing trace with hash 32528759, now seen corresponding path program 1 times [2020-10-20 07:06:23,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:23,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279012844] [2020-10-20 07:06:23,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,683 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:23,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:23,702 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:23,754 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-20 07:06:23,754 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 07:06:23,820 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:23,820 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:23,820 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:23,820 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:23,820 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:06:23,821 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:23,821 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:23,821 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:23,821 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2020-10-20 07:06:23,821 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:23,821 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:23,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:23,826 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:23,837 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:23,841 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:23,915 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:23,915 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:23,927 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:23,927 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:23,932 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:06:23,932 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post6=0} Honda state: {ULTIMATE.start_main_#t~post6=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:23,986 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:23,986 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:24,040 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:06:24,041 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:24,439 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 07:06:24,443 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:24,443 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:24,443 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:24,443 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:24,443 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 07:06:24,443 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:24,444 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:24,444 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:24,444 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration4_Loop [2020-10-20 07:06:24,444 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:24,444 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:24,446 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:24,448 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:24,460 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:24,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:24,546 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:24,546 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:24,570 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:24,572 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:24,572 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:24,572 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:24,572 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:24,573 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:24,573 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:24,573 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:24,578 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:24,639 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:24,642 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:24,642 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:24,642 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:24,642 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:24,643 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:24,645 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:24,645 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:24,648 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 07:06:24,684 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2020-10-20 07:06:24,684 INFO L444 ModelExtractionUtils]: 1 out of 5 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:24,688 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 07:06:24,689 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 07:06:24,689 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 07:06:24,689 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~j~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~j~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2020-10-20 07:06:24,723 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 07:06:24,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:24,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:24,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:24,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:24,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:24,780 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 [2020-10-20 07:06:24,780 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9 Second operand 3 states. [2020-10-20 07:06:24,813 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 29 states and 36 transitions. cyclomatic complexity: 9. Second operand 3 states. Result 72 states and 91 transitions. Complement of second has 7 states. [2020-10-20 07:06:24,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:24,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-20 07:06:24,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 6 letters. [2020-10-20 07:06:24,815 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:24,815 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 12 letters. Loop has 6 letters. [2020-10-20 07:06:24,816 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:24,816 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 6 letters. Loop has 12 letters. [2020-10-20 07:06:24,816 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:24,816 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 72 states and 91 transitions. [2020-10-20 07:06:24,828 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2020-10-20 07:06:24,830 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 72 states to 57 states and 72 transitions. [2020-10-20 07:06:24,830 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-10-20 07:06:24,830 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 22 [2020-10-20 07:06:24,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 72 transitions. [2020-10-20 07:06:24,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:24,831 INFO L691 BuchiCegarLoop]: Abstraction has 57 states and 72 transitions. [2020-10-20 07:06:24,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states and 72 transitions. [2020-10-20 07:06:24,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2020-10-20 07:06:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-20 07:06:24,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-20 07:06:24,834 INFO L714 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-20 07:06:24,834 INFO L594 BuchiCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-20 07:06:24,835 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 07:06:24,835 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 44 states and 55 transitions. [2020-10-20 07:06:24,835 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 13 [2020-10-20 07:06:24,836 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:24,836 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:24,836 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 07:06:24,836 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:06:24,836 INFO L794 eck$LassoCheckResult]: Stem: 479#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 474#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 462#L28 assume !!(main_~n~0 < 1000000); 463#L29 assume main_~k~0 == main_~n~0; 464#L29-1 main_~i~0 := 0; 465#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 469#L34-2 assume !!(main_~j~0 < main_~n~0); 483#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 459#L36-2 [2020-10-20 07:06:24,837 INFO L796 eck$LassoCheckResult]: Loop: 459#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 466#L18 assume !(0 == __VERIFIER_assert_~cond); 458#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 459#L36-2 [2020-10-20 07:06:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 177631345, now seen corresponding path program 1 times [2020-10-20 07:06:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:24,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598771315] [2020-10-20 07:06:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:24,847 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:24,855 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:24,859 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash 70956, now seen corresponding path program 1 times [2020-10-20 07:06:24,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:24,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908084499] [2020-10-20 07:06:24,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:24,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:24,877 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:24,887 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:24,888 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:24,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 415731388, now seen corresponding path program 1 times [2020-10-20 07:06:24,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:24,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251379003] [2020-10-20 07:06:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:24,927 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:24,949 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:24,958 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:25,024 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:25,025 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:25,025 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:25,025 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:25,025 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:06:25,025 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:25,025 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:25,025 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:25,025 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2020-10-20 07:06:25,025 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:25,026 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:25,027 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:25,041 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:25,044 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:25,093 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:25,094 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:25,100 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:25,100 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:25,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:06:25,143 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:25,374 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 07:06:25,376 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:25,376 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:25,377 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:25,377 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:25,377 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 07:06:25,377 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:25,377 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:25,377 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:25,378 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration5_Loop [2020-10-20 07:06:25,378 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:25,378 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:25,379 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:25,392 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:25,401 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:25,450 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:25,450 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:25,462 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:25,463 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:25,464 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:25,467 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:25,467 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:25,467 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:25,469 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:25,469 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:06:25,473 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 07:06:25,478 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 07:06:25,478 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:25,482 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 07:06:25,483 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 07:06:25,483 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 07:06:25,483 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~k~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2020-10-20 07:06:25,516 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 07:06:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:25,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:25,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:25,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:25,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:25,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:25,570 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 [2020-10-20 07:06:25,570 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15 Second operand 3 states. [2020-10-20 07:06:25,622 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 44 states and 55 transitions. cyclomatic complexity: 15. Second operand 3 states. Result 133 states and 168 transitions. Complement of second has 7 states. [2020-10-20 07:06:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:25,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-10-20 07:06:25,623 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 3 letters. [2020-10-20 07:06:25,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:25,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 11 letters. Loop has 3 letters. [2020-10-20 07:06:25,624 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:25,624 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 8 letters. Loop has 6 letters. [2020-10-20 07:06:25,625 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:25,625 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 133 states and 168 transitions. [2020-10-20 07:06:25,630 INFO L131 ngComponentsAnalysis]: Automaton has 4 accepting balls. 25 [2020-10-20 07:06:25,632 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 133 states to 98 states and 122 transitions. [2020-10-20 07:06:25,635 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 35 [2020-10-20 07:06:25,635 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 36 [2020-10-20 07:06:25,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 98 states and 122 transitions. [2020-10-20 07:06:25,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:25,636 INFO L691 BuchiCegarLoop]: Abstraction has 98 states and 122 transitions. [2020-10-20 07:06:25,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states and 122 transitions. [2020-10-20 07:06:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 68. [2020-10-20 07:06:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-20 07:06:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-20 07:06:25,652 INFO L714 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-20 07:06:25,652 INFO L594 BuchiCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-20 07:06:25,652 INFO L427 BuchiCegarLoop]: ======== Iteration 6============ [2020-10-20 07:06:25,653 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 68 states and 84 transitions. [2020-10-20 07:06:25,653 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 19 [2020-10-20 07:06:25,654 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:25,655 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:25,655 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 07:06:25,656 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1, 1, 1] [2020-10-20 07:06:25,656 INFO L794 eck$LassoCheckResult]: Stem: 713#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 709#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 696#L28 assume !!(main_~n~0 < 1000000); 697#L29 assume main_~k~0 == main_~n~0; 698#L29-1 main_~i~0 := 0; 699#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 704#L34-2 assume !!(main_~j~0 < main_~n~0); 734#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 738#L18-3 assume !(0 == __VERIFIER_assert_~cond); 737#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 736#L18-6 assume !(0 == __VERIFIER_assert_~cond); 735#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 730#L34-2 assume !(main_~j~0 < main_~n~0); 732#L33-2 main_#t~post5 := main_~i~0;main_~i~0 := 1 + main_#t~post5;havoc main_#t~post5; 729#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 727#L34-2 [2020-10-20 07:06:25,656 INFO L796 eck$LassoCheckResult]: Loop: 727#L34-2 assume !!(main_~j~0 < main_~n~0); 722#L35 assume !(0 != main_#t~nondet7);havoc main_#t~nondet7;__VERIFIER_assert_#in~cond := (if main_~k~0 >= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 723#L18-3 assume !(0 == __VERIFIER_assert_~cond); 733#L18-5 __VERIFIER_assert_#in~cond := (if main_~k~0 <= main_~n~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 731#L18-6 assume !(0 == __VERIFIER_assert_~cond); 728#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 727#L34-2 [2020-10-20 07:06:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:25,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1598319404, now seen corresponding path program 1 times [2020-10-20 07:06:25,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:25,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061859985] [2020-10-20 07:06:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061859985] [2020-10-20 07:06:25,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540875623] [2020-10-20 07:06:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 07:06:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-20 07:06:25,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:25,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 07:06:25,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-20 07:06:25,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519854369] [2020-10-20 07:06:25,926 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 07:06:25,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:25,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1807888138, now seen corresponding path program 2 times [2020-10-20 07:06:25,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:25,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547788992] [2020-10-20 07:06:25,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:25,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:25,937 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:25,939 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:25,961 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-10-20 07:06:25,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-20 07:06:26,031 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:26,031 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:26,031 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:26,032 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:26,032 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:06:26,032 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:26,032 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:26,032 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:26,032 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2020-10-20 07:06:26,032 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:26,033 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:26,034 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,046 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,049 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,062 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,115 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:26,115 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:26,121 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:26,121 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:26,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:06:26,157 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:26,450 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 07:06:26,452 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:26,453 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:26,453 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:26,453 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:26,453 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 07:06:26,453 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:26,453 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:26,453 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:26,453 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration6_Loop [2020-10-20 07:06:26,453 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:26,453 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:26,455 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,467 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,472 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,474 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:26,531 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:26,531 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:26,548 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:26,549 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:26,549 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:26,550 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:26,550 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:26,550 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:26,551 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:26,551 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:26,555 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 07:06:26,562 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 07:06:26,562 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:26,571 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 07:06:26,571 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 07:06:26,571 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 07:06:26,571 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~n~0, ULTIMATE.start_main_~j~0) = 1*ULTIMATE.start_main_~n~0 - 1*ULTIMATE.start_main_~j~0 Supporting invariants [] [2020-10-20 07:06:26,600 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 07:06:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:26,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:26,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:26,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:26,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:26,649 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 [2020-10-20 07:06:26,649 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand 3 states. [2020-10-20 07:06:26,675 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand 3 states. Result 124 states and 156 transitions. Complement of second has 7 states. [2020-10-20 07:06:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:26,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-20 07:06:26,677 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-20 07:06:26,677 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:26,677 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 07:06:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:26,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:26,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:26,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:26,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:26,725 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 [2020-10-20 07:06:26,725 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand 3 states. [2020-10-20 07:06:26,744 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand 3 states. Result 124 states and 156 transitions. Complement of second has 7 states. [2020-10-20 07:06:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 19 transitions. [2020-10-20 07:06:26,746 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 19 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-20 07:06:26,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:26,746 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 07:06:26,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:26,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:26,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:26,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:26,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:26,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:26,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:26,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:26,835 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 [2020-10-20 07:06:26,835 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24 Second operand 3 states. [2020-10-20 07:06:26,860 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 68 states and 84 transitions. cyclomatic complexity: 24. Second operand 3 states. Result 124 states and 155 transitions. Complement of second has 6 states. [2020-10-20 07:06:26,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:26,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:26,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2020-10-20 07:06:26,861 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-20 07:06:26,862 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:26,862 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 21 letters. Loop has 6 letters. [2020-10-20 07:06:26,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:26,863 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 12 letters. [2020-10-20 07:06:26,863 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:26,864 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 124 states and 155 transitions. [2020-10-20 07:06:26,866 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2020-10-20 07:06:26,867 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 124 states to 75 states and 93 transitions. [2020-10-20 07:06:26,867 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 16 [2020-10-20 07:06:26,867 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2020-10-20 07:06:26,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 93 transitions. [2020-10-20 07:06:26,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:26,868 INFO L691 BuchiCegarLoop]: Abstraction has 75 states and 93 transitions. [2020-10-20 07:06:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states and 93 transitions. [2020-10-20 07:06:26,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 49. [2020-10-20 07:06:26,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-20 07:06:26,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2020-10-20 07:06:26,872 INFO L714 BuchiCegarLoop]: Abstraction has 49 states and 62 transitions. [2020-10-20 07:06:26,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 07:06:26,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-20 07:06:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-20 07:06:26,873 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 12 states. [2020-10-20 07:06:26,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 07:06:26,976 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2020-10-20 07:06:26,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-20 07:06:26,976 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 148 states and 181 transitions. [2020-10-20 07:06:26,978 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 9 [2020-10-20 07:06:26,980 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 148 states to 144 states and 177 transitions. [2020-10-20 07:06:26,980 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 21 [2020-10-20 07:06:26,980 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 21 [2020-10-20 07:06:26,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 144 states and 177 transitions. [2020-10-20 07:06:26,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 07:06:26,981 INFO L691 BuchiCegarLoop]: Abstraction has 144 states and 177 transitions. [2020-10-20 07:06:26,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states and 177 transitions. [2020-10-20 07:06:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 61. [2020-10-20 07:06:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-20 07:06:26,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-20 07:06:26,986 INFO L714 BuchiCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-20 07:06:26,986 INFO L594 BuchiCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-20 07:06:26,986 INFO L427 BuchiCegarLoop]: ======== Iteration 7============ [2020-10-20 07:06:26,986 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 61 states and 76 transitions. [2020-10-20 07:06:26,987 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2020-10-20 07:06:26,987 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 07:06:26,988 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 07:06:26,988 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 07:06:26,988 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2020-10-20 07:06:26,989 INFO L794 eck$LassoCheckResult]: Stem: 1629#ULTIMATE.startENTRY #NULL.base, #NULL.offset := 0, 0;#valid := #valid[0 := 0];assume 0 < #StackHeapBarrier;call #t~string0.base, #t~string0.offset := #Ultimate.allocOnStack(2);call write~init~int(48, #t~string0.base, #t~string0.offset, 1);call write~init~int(0, #t~string0.base, 1 + #t~string0.offset, 1);call #t~string1.base, #t~string1.offset := #Ultimate.allocOnStack(9); 1625#L-1 havoc main_#res;havoc main_#t~nondet3, main_#t~nondet4, main_#t~nondet7, main_#t~post8, main_#t~post6, main_#t~post5, main_~i~0, main_~j~0, main_~k~0, main_~n~0;havoc main_~i~0;havoc main_~j~0;havoc main_~k~0;havoc main_~n~0;main_~k~0 := main_#t~nondet3;havoc main_#t~nondet3;main_~n~0 := main_#t~nondet4;havoc main_#t~nondet4; 1613#L28 assume !!(main_~n~0 < 1000000); 1614#L29 assume main_~k~0 == main_~n~0; 1615#L29-1 main_~i~0 := 0; 1616#L33-3 assume !!(main_~i~0 < main_~n~0);main_~j~0 := 2 * main_~i~0; 1620#L34-2 assume !!(main_~j~0 < main_~n~0); 1628#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 1631#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1618#L18 assume !(0 == __VERIFIER_assert_~cond); 1611#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 1612#L36-2 assume !(main_~k~0 < main_~n~0); 1642#L18-8 main_#t~post6 := main_~j~0;main_~j~0 := 1 + main_#t~post6;havoc main_#t~post6; 1633#L34-2 assume !!(main_~j~0 < main_~n~0); 1632#L35 assume 0 != main_#t~nondet7;havoc main_#t~nondet7;main_~k~0 := main_~j~0; 1610#L36-2 [2020-10-20 07:06:26,989 INFO L796 eck$LassoCheckResult]: Loop: 1610#L36-2 assume !!(main_~k~0 < main_~n~0);__VERIFIER_assert_#in~cond := (if main_~k~0 >= 2 * main_~i~0 then 1 else 0);havoc __VERIFIER_assert_~cond;__VERIFIER_assert_~cond := __VERIFIER_assert_#in~cond; 1617#L18 assume !(0 == __VERIFIER_assert_~cond); 1609#L18-2 main_#t~post8 := main_~k~0;main_~k~0 := 1 + main_#t~post8;havoc main_#t~post8; 1610#L36-2 [2020-10-20 07:06:26,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:26,989 INFO L82 PathProgramCache]: Analyzing trace with hash 951911067, now seen corresponding path program 1 times [2020-10-20 07:06:26,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:26,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794727103] [2020-10-20 07:06:26,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794727103] [2020-10-20 07:06:27,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968676215] [2020-10-20 07:06:27,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 07:06:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:27,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 07:06:27,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-20 07:06:27,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197900619] [2020-10-20 07:06:27,122 INFO L799 eck$LassoCheckResult]: stem already infeasible [2020-10-20 07:06:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:27,122 INFO L82 PathProgramCache]: Analyzing trace with hash 70956, now seen corresponding path program 2 times [2020-10-20 07:06:27,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 07:06:27,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691627254] [2020-10-20 07:06:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 07:06:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:27,133 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 07:06:27,142 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 07:06:27,145 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 07:06:27,196 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:27,196 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:27,196 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:27,196 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:27,196 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 07:06:27,196 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,196 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:27,196 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:27,197 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2020-10-20 07:06:27,197 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:27,197 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:27,198 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:27,203 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:27,206 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:27,258 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:27,258 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,264 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:27,265 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:27,268 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:06:27,268 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Honda state: {ULTIMATE.start___VERIFIER_assert_~cond=1, ULTIMATE.start___VERIFIER_assert_#in~cond=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 07:06:27,290 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:27,291 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,293 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 07:06:27,293 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~post8=0} Honda state: {ULTIMATE.start_main_#t~post8=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,317 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 07:06:27,317 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,348 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 07:06:27,348 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 07:06:27,564 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 07:06:27,566 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 07:06:27,566 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 07:06:27,566 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 07:06:27,566 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 07:06:27,566 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 07:06:27,567 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,567 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 07:06:27,567 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 07:06:27,567 INFO L133 ssoRankerPreferences]: Filename of dumped script: nested6.i_Iteration7_Loop [2020-10-20 07:06:27,567 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 07:06:27,567 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 07:06:27,568 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:27,573 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:27,582 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2020-10-20 07:06:27,638 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 07:06:27,638 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,642 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:27,643 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:27,644 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:27,644 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:27,644 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:27,644 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:27,645 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:27,645 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:06:27,648 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,670 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2020-10-20 07:06:27,672 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 07:06:27,672 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 07:06:27,672 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 07:06:27,672 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 07:06:27,673 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 07:06:27,674 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 07:06:27,674 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 07:06:27,676 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 07:06:27,679 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 07:06:27,679 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 07:06:27,682 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 07:06:27,682 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 07:06:27,682 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 07:06:27,682 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~k~0, ULTIMATE.start_main_~n~0) = -1*ULTIMATE.start_main_~k~0 + 1*ULTIMATE.start_main_~n~0 Supporting invariants [] [2020-10-20 07:06:27,703 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 07:06:27,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:27,750 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 [2020-10-20 07:06:27,751 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21 Second operand 3 states. [2020-10-20 07:06:27,802 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21. Second operand 3 states. Result 116 states and 148 transitions. Complement of second has 7 states. [2020-10-20 07:06:27,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:27,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-10-20 07:06:27,803 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2020-10-20 07:06:27,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:27,804 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 07:06:27,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:27,850 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 [2020-10-20 07:06:27,850 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21 Second operand 3 states. [2020-10-20 07:06:27,885 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21. Second operand 3 states. Result 116 states and 148 transitions. Complement of second has 7 states. [2020-10-20 07:06:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:27,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:27,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 28 transitions. [2020-10-20 07:06:27,886 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 28 transitions. Stem has 15 letters. Loop has 3 letters. [2020-10-20 07:06:27,886 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:27,887 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 07:06:27,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 07:06:27,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 07:06:27,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 07:06:27,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 07:06:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 07:06:27,944 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 [2020-10-20 07:06:27,944 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21 Second operand 3 states. [2020-10-20 07:06:27,991 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 61 states and 76 transitions. cyclomatic complexity: 21. Second operand 3 states. Result 95 states and 120 transitions. Complement of second has 6 states. [2020-10-20 07:06:27,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2020-10-20 07:06:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 07:06:27,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 33 transitions. [2020-10-20 07:06:27,992 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 3 letters. [2020-10-20 07:06:27,993 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:27,993 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 18 letters. Loop has 3 letters. [2020-10-20 07:06:27,993 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:27,993 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 33 transitions. Stem has 15 letters. Loop has 6 letters. [2020-10-20 07:06:27,993 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 07:06:27,993 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 95 states and 120 transitions. [2020-10-20 07:06:27,995 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 07:06:27,995 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 95 states to 0 states and 0 transitions. [2020-10-20 07:06:27,995 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 07:06:27,995 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 07:06:27,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 07:06:27,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 07:06:27,996 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 07:06:27,996 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 07:06:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 07:06:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 07:06:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 07:06:27,997 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 6 states. [2020-10-20 07:06:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 07:06:27,997 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-20 07:06:27,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 07:06:27,997 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-20 07:06:27,997 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 07:06:27,997 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 07:06:27,997 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 07:06:27,998 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 07:06:27,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 07:06:27,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 07:06:27,998 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 07:06:27,999 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 07:06:27,999 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 07:06:27,999 INFO L427 BuchiCegarLoop]: ======== Iteration 8============ [2020-10-20 07:06:27,999 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 07:06:27,999 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 07:06:28,000 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 07:06:28,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 07:06:28 BoogieIcfgContainer [2020-10-20 07:06:28,007 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 07:06:28,007 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 07:06:28,007 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 07:06:28,008 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 07:06:28,008 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 07:06:21" (3/4) ... [2020-10-20 07:06:28,012 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 07:06:28,012 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 07:06:28,015 INFO L168 Benchmark]: Toolchain (without parser) took 6778.52 ms. Allocated memory was 42.5 MB in the beginning and 64.5 MB in the end (delta: 22.0 MB). Free memory was 23.2 MB in the beginning and 36.4 MB in the end (delta: -13.2 MB). Peak memory consumption was 8.8 MB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,015 INFO L168 Benchmark]: CDTParser took 1.00 ms. Allocated memory is still 32.0 MB. Free memory was 10.7 MB in the beginning and 10.6 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,016 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.39 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 22.4 MB in the beginning and 24.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,017 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.71 ms. Allocated memory is still 43.0 MB. Free memory was 24.5 MB in the beginning and 22.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,018 INFO L168 Benchmark]: Boogie Preprocessor took 24.68 ms. Allocated memory is still 43.0 MB. Free memory was 22.6 MB in the beginning and 21.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,019 INFO L168 Benchmark]: RCFGBuilder took 316.89 ms. Allocated memory was 43.0 MB in the beginning and 46.1 MB in the end (delta: 3.1 MB). Free memory was 21.3 MB in the beginning and 25.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,020 INFO L168 Benchmark]: BuchiAutomizer took 6117.36 ms. Allocated memory was 46.1 MB in the beginning and 64.5 MB in the end (delta: 18.4 MB). Free memory was 25.7 MB in the beginning and 36.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-20 07:06:28,020 INFO L168 Benchmark]: Witness Printer took 4.93 ms. Allocated memory is still 64.5 MB. Free memory is still 36.4 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 07:06:28,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.00 ms. Allocated memory is still 32.0 MB. Free memory was 10.7 MB in the beginning and 10.6 MB in the end (delta: 45.6 kB). Peak memory consumption was 45.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 263.39 ms. Allocated memory was 42.5 MB in the beginning and 43.0 MB in the end (delta: 524.3 kB). Free memory was 22.4 MB in the beginning and 24.5 MB in the end (delta: -2.1 MB). Peak memory consumption was 13.6 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 40.71 ms. Allocated memory is still 43.0 MB. Free memory was 24.5 MB in the beginning and 22.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 24.68 ms. Allocated memory is still 43.0 MB. Free memory was 22.6 MB in the beginning and 21.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 316.89 ms. Allocated memory was 43.0 MB in the beginning and 46.1 MB in the end (delta: 3.1 MB). Free memory was 21.3 MB in the beginning and 25.7 MB in the end (delta: -4.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 6117.36 ms. Allocated memory was 46.1 MB in the beginning and 64.5 MB in the end (delta: 18.4 MB). Free memory was 25.7 MB in the beginning and 36.4 MB in the end (delta: -10.7 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. * Witness Printer took 4.93 ms. Allocated memory is still 64.5 MB. Free memory is still 36.4 MB. There was no memory consumed. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 10 terminating modules (5 trivial, 3 deterministic, 2 nondeterministic). One deterministic module has affine ranking function n + -1 * i and consists of 3 locations. One deterministic module has affine ranking function -1 * j + n and consists of 4 locations. One deterministic module has affine ranking function -1 * k + n and consists of 4 locations. One nondeterministic module has affine ranking function n + -1 * j and consists of 4 locations. One nondeterministic module has affine ranking function -1 * k + n and consists of 4 locations. 5 modules have a trivial ranking function, the largest among these consists of 12 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 6.0s and 8 iterations. TraceHistogramMax:2. Analysis of lassos took 4.6s. Construction of modules took 0.3s. Büchi inclusion checks took 0.8s. Highest rank in rank-based complementation 3. Minimization of det autom 3. Minimization of nondet autom 7. Automata minimization 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 173 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 68 states and ocurred in iteration 5. Nontrivial modules had stage [3, 0, 2, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 221 SDtfs, 350 SDslu, 142 SDs, 0 SdLazy, 296 SolverSat, 27 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time LassoAnalysisResults: nont0 unkn0 SFLI2 SFLT2 conc0 concLT1 SILN0 SILU0 SILI0 SILT2 lasso0 LassoPreprocessingBenchmarks: Lassos: inital22 mio100 ax100 hnf98 lsp74 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq144 hnf94 smp100 dnf100 smp100 tf109 neg100 sie108 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 33ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 4 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 5 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 1.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...