./Ultimate.py --spec ../sv-benchmarks/c/properties/termination.prp --file ../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 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/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(F end) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash df3ddc93bc6339292c9158119f1fdb949bb8842d ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 06:34:17,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:34:17,045 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:34:17,089 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:34:17,089 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:34:17,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:34:17,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:34:17,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:34:17,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:34:17,115 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:34:17,117 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:34:17,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:34:17,118 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:34:17,122 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:34:17,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:34:17,125 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:34:17,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:34:17,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:34:17,130 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:34:17,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:34:17,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:34:17,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:34:17,142 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:34:17,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:34:17,154 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:34:17,154 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:34:17,154 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:34:17,157 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:34:17,158 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:34:17,159 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:34:17,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:34:17,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:34:17,162 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:34:17,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:34:17,167 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:34:17,167 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:34:17,168 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:34:17,170 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:34:17,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:34:17,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:34:17,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:34:17,174 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Termination-64bit-Automizer_Default.epf [2020-10-20 06:34:17,215 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:34:17,215 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:34:17,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:34:17,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:34:17,217 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:34:17,217 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2020-10-20 06:34:17,218 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2020-10-20 06:34:17,218 INFO L138 SettingsManager]: * Use old map elimination=false [2020-10-20 06:34:17,218 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2020-10-20 06:34:17,218 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2020-10-20 06:34:17,219 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2020-10-20 06:34:17,219 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:34:17,220 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:34:17,220 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:34:17,220 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:34:17,220 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2020-10-20 06:34:17,221 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2020-10-20 06:34:17,221 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2020-10-20 06:34:17,221 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:34:17,221 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2020-10-20 06:34:17,222 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:34:17,222 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2020-10-20 06:34:17,222 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:34:17,222 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:34:17,223 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2020-10-20 06:34:17,223 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:34:17,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:34:17,223 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:34:17,223 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2020-10-20 06:34:17,225 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2020-10-20 06:34:17,225 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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> df3ddc93bc6339292c9158119f1fdb949bb8842d [2020-10-20 06:34:17,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:34:17,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:34:17,445 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:34:17,446 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:34:17,447 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:34:17,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2020-10-20 06:34:17,507 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c233088ab/f78033526de448a6bc20631c38c74659/FLAG66c62036e [2020-10-20 06:34:17,960 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:34:17,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a.c [2020-10-20 06:34:17,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c233088ab/f78033526de448a6bc20631c38c74659/FLAG66c62036e [2020-10-20 06:34:18,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c233088ab/f78033526de448a6bc20631c38c74659 [2020-10-20 06:34:18,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:34:18,371 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:34:18,372 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:34:18,372 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:34:18,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:34:18,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79c6109c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18, skipping insertion in model container [2020-10-20 06:34:18,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,389 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:34:18,406 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:34:18,635 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:34:18,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:34:18,657 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:34:18,671 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:34:18,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18 WrapperNode [2020-10-20 06:34:18,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:34:18,673 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:34:18,673 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:34:18,673 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:34:18,682 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,687 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:34:18,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:34:18,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:34:18,705 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:34:18,713 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,713 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,716 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (1/1) ... [2020-10-20 06:34:18,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:34:18,722 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:34:18,722 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:34:18,722 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:34:18,723 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (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 06:34:18,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:34:18,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:34:18,915 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:34:18,915 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-20 06:34:18,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:34:18 BoogieIcfgContainer [2020-10-20 06:34:18,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:34:18,918 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2020-10-20 06:34:18,918 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2020-10-20 06:34:18,922 INFO L275 PluginConnector]: BuchiAutomizer initialized [2020-10-20 06:34:18,923 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:34:18,923 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.10 06:34:18" (1/3) ... [2020-10-20 06:34:18,925 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ea98d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:34:18, skipping insertion in model container [2020-10-20 06:34:18,925 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:34:18,925 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:34:18" (2/3) ... [2020-10-20 06:34:18,925 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@5ea98d73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.10 06:34:18, skipping insertion in model container [2020-10-20 06:34:18,925 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2020-10-20 06:34:18,926 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:34:18" (3/3) ... [2020-10-20 06:34:18,928 INFO L373 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a.c [2020-10-20 06:34:18,986 INFO L359 BuchiCegarLoop]: Interprodecural is true [2020-10-20 06:34:18,987 INFO L360 BuchiCegarLoop]: Hoare is false [2020-10-20 06:34:18,987 INFO L361 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2020-10-20 06:34:18,987 INFO L362 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:34:18,987 INFO L363 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:34:18,987 INFO L364 BuchiCegarLoop]: Difference is false [2020-10-20 06:34:18,988 INFO L365 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:34:18,988 INFO L368 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2020-10-20 06:34:19,003 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-10-20 06:34:19,025 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:19,025 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:34:19,025 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:34:19,031 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:34:19,031 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:34:19,031 INFO L427 BuchiCegarLoop]: ======== Iteration 1============ [2020-10-20 06:34:19,031 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2020-10-20 06:34:19,032 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:19,032 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:34:19,032 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:34:19,032 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1] [2020-10-20 06:34:19,032 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:34:19,039 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 3#L17-2true [2020-10-20 06:34:19,039 INFO L796 eck$LassoCheckResult]: Loop: 3#L17-2true assume !!(0 != main_~x~0); 5#L17true assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 3#L17-2true [2020-10-20 06:34:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:19,044 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2020-10-20 06:34:19,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:19,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226464970] [2020-10-20 06:34:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:19,131 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:19,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:19,134 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:19,151 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:19,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2020-10-20 06:34:19,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:19,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161073067] [2020-10-20 06:34:19,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:19,163 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:19,167 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:19,168 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2020-10-20 06:34:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:19,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936212807] [2020-10-20 06:34:19,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:19,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:19,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:19,182 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:19,261 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:19,262 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:19,262 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:19,263 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:19,263 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:34:19,263 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:19,263 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:19,263 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:19,264 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2020-10-20 06:34:19,264 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:19,264 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:19,290 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 06:34:19,301 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 06:34:19,307 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 06:34:19,406 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:19,407 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) [2020-10-20 06:34:19,426 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:19,426 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:19,438 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:34:19,438 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_1=0} Honda state: {v_rep~unnamed0~0~false_1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 06:34:19,490 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:19,490 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:34:19,496 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:34:19,496 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_1=1} Honda state: {v_rep~unnamed0~0~true_1=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 06:34:19,532 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:19,532 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 4 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 5 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:19,564 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:34:19,564 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:34:19,600 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:34:19,603 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:19,603 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:19,603 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:19,604 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:19,604 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:34:19,604 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:19,604 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:19,604 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:19,604 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration1_Loop [2020-10-20 06:34:19,604 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:19,604 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:19,607 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 06:34:19,613 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 06:34:19,619 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 06:34:19,692 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:19,697 INFO L489 LassoAnalysis]: Using template 'affine'. 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 06:34:19,707 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 06:34:19,711 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:19,711 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:19,712 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:19,712 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:19,718 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:34:19,718 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:34:19,728 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 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 06:34:19,766 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 06:34:19,771 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:19,771 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:19,771 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:19,771 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:19,780 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:34:19,781 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:34:19,795 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:34:19,846 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 06:34:19,850 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:19,850 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:34:19,850 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:19,851 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:19,851 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:19,853 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:34:19,854 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:19,859 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:34:19,865 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:34:19,865 INFO L444 ModelExtractionUtils]: 0 out of 3 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 9 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:19,879 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:34:19,880 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:34:19,880 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:34:19,881 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2020-10-20 06:34:19,908 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:34:19,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:19,945 WARN L261 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:34:19,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:19,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:19,959 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 06:34:19,979 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-20 06:34:19,980 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2020-10-20 06:34:20,056 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2020-10-20 06:34:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2020-10-20 06:34:20,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:34:20,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2020-10-20 06:34:20,062 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2020-10-20 06:34:20,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:20,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-20 06:34:20,064 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:20,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2020-10-20 06:34:20,064 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:20,065 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2020-10-20 06:34:20,073 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:20,079 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2020-10-20 06:34:20,080 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-20 06:34:20,080 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2020-10-20 06:34:20,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2020-10-20 06:34:20,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:34:20,081 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:34:20,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2020-10-20 06:34:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2020-10-20 06:34:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2020-10-20 06:34:20,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2020-10-20 06:34:20,113 INFO L714 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:34:20,114 INFO L594 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2020-10-20 06:34:20,114 INFO L427 BuchiCegarLoop]: ======== Iteration 2============ [2020-10-20 06:34:20,114 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2020-10-20 06:34:20,115 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:20,115 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:34:20,115 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:34:20,116 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2020-10-20 06:34:20,116 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:34:20,116 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 69#L17-2 assume !!(0 != main_~x~0); 67#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 63#L17-2 [2020-10-20 06:34:20,116 INFO L796 eck$LassoCheckResult]: Loop: 63#L17-2 assume !!(0 != main_~x~0); 64#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 63#L17-2 [2020-10-20 06:34:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2020-10-20 06:34:20,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:20,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645819565] [2020-10-20 06:34:20,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,130 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,139 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,142 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:20,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2020-10-20 06:34:20,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:20,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579549705] [2020-10-20 06:34:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,149 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,157 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:20,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,158 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2020-10-20 06:34:20,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:20,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6256946] [2020-10-20 06:34:20,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:20,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:34:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6256946] [2020-10-20 06:34:20,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801040386] [2020-10-20 06:34:20,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:34:20,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:20,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 12 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:34:20,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-20 06:34:20,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2020-10-20 06:34:20,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659328614] [2020-10-20 06:34:20,323 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:20,323 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:20,324 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:20,324 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:20,324 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:34:20,324 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,324 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:20,324 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:20,324 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2020-10-20 06:34:20,325 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:20,325 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:20,327 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 06:34:20,331 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 06:34:20,346 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 06:34:20,394 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:20,394 INFO L404 LassoAnalysis]: Checking for nontermination... 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) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,398 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:20,398 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:34:20,402 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:34:20,403 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~false_3=0} Honda state: {v_rep~unnamed0~0~false_3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 06:34:20,455 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:20,455 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,460 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:34:20,460 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_3=1} Honda state: {v_rep~unnamed0~0~true_3=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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) [2020-10-20 06:34:20,507 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:20,508 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 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 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:34:20,559 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:34:20,559 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,599 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:34:20,600 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:20,601 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:20,601 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:20,601 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:20,601 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:34:20,601 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,601 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:20,601 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:20,602 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration2_Loop [2020-10-20 06:34:20,602 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:20,602 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:20,603 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 06:34:20,607 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 06:34:20,611 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 06:34:20,655 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:20,655 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 06:34:20,669 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 Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,671 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:20,671 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:20,671 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:20,671 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:20,674 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:34:20,674 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:34:20,679 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 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 06:34:20,727 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 06:34:20,729 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:20,729 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:20,729 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:20,729 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:20,738 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:34:20,739 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:34:20,744 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 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 06:34:20,789 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 06:34:20,791 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:20,791 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:34:20,792 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:20,792 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:20,792 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:20,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2020-10-20 06:34:20,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:34:20,800 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:34:20,802 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2020-10-20 06:34:20,803 INFO L444 ModelExtractionUtils]: 1 out of 3 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 18 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,806 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:34:20,807 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:34:20,807 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:34:20,807 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = 1*ULTIMATE.start_main_~x~0 Supporting invariants [] [2020-10-20 06:34:20,840 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:34:20,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:20,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:34:20,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:20,866 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:20,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:20,867 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 06:34:20,867 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 1 loop predicates [2020-10-20 06:34:20,867 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2020-10-20 06:34:20,879 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 11 states and 16 transitions. Complement of second has 5 states. [2020-10-20 06:34:20,880 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 06:34:20,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:34:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2020-10-20 06:34:20,881 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2020-10-20 06:34:20,881 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:20,882 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2020-10-20 06:34:20,882 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:20,882 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2020-10-20 06:34:20,882 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:20,882 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2020-10-20 06:34:20,883 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:20,884 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2020-10-20 06:34:20,884 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2020-10-20 06:34:20,884 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-20 06:34:20,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2020-10-20 06:34:20,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:34:20,885 INFO L691 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-10-20 06:34:20,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2020-10-20 06:34:20,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-10-20 06:34:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-10-20 06:34:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2020-10-20 06:34:20,887 INFO L714 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2020-10-20 06:34:20,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:34:20,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:34:20,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:34:20,892 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2020-10-20 06:34:20,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:34:20,922 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2020-10-20 06:34:20,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:34:20,923 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2020-10-20 06:34:20,924 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:20,924 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2020-10-20 06:34:20,924 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2020-10-20 06:34:20,925 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2020-10-20 06:34:20,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2020-10-20 06:34:20,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:34:20,925 INFO L691 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2020-10-20 06:34:20,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2020-10-20 06:34:20,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2020-10-20 06:34:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 06:34:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2020-10-20 06:34:20,927 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-10-20 06:34:20,927 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2020-10-20 06:34:20,927 INFO L427 BuchiCegarLoop]: ======== Iteration 3============ [2020-10-20 06:34:20,927 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2020-10-20 06:34:20,927 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:20,928 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:34:20,928 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:34:20,928 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2020-10-20 06:34:20,928 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:34:20,928 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 158#L17-2 assume !!(0 != main_~x~0); 154#L17 [2020-10-20 06:34:20,928 INFO L796 eck$LassoCheckResult]: Loop: 154#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 153#L17-2 assume !!(0 != main_~x~0); 154#L17 [2020-10-20 06:34:20,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2020-10-20 06:34:20,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:20,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528199127] [2020-10-20 06:34:20,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,934 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,936 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,937 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:20,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2020-10-20 06:34:20,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:20,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017763970] [2020-10-20 06:34:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,942 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,945 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,946 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:20,946 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2020-10-20 06:34:20,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:20,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560923838] [2020-10-20 06:34:20,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:20,955 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:20,956 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:20,973 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:20,973 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:20,973 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:20,973 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:20,973 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:34:20,974 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:20,974 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:20,974 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:20,974 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2020-10-20 06:34:20,974 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:20,974 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:20,976 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 06:34:20,980 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 06:34:20,988 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 06:34:21,093 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:21,094 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) [2020-10-20 06:34:21,114 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:21,114 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,122 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:34:21,122 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_5=1} Honda state: {v_rep~unnamed0~0~true_5=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 06:34:21,166 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:21,166 INFO L160 nArgumentSynthesizer]: Using integer mode. 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 06:34:21,228 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:34:21,228 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,388 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:34:21,390 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:21,390 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:21,391 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:21,391 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:21,391 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:34:21,391 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,391 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:21,391 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:21,391 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration3_Loop [2020-10-20 06:34:21,391 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:21,392 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:21,394 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 06:34:21,398 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 06:34:21,407 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 06:34:21,476 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:21,476 INFO L489 LassoAnalysis]: Using template 'affine'. 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) [2020-10-20 06:34:21,495 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 06:34:21,497 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:21,497 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:21,497 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:21,498 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:21,500 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:34:21,500 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,505 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 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:34:21,544 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 06:34:21,546 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:21,546 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:34:21,546 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:21,546 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-20 06:34:21,547 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:21,548 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-20 06:34:21,548 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2020-10-20 06:34:21,552 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,556 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:34:21,556 INFO L444 ModelExtractionUtils]: 0 out of 3 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 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:34:21,559 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:34:21,560 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:34:21,560 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:34:21,560 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,597 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:34:21,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:21,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:34:21,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:21,625 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:21,655 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 06:34:21,656 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 06:34:21,656 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2020-10-20 06:34:21,669 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4. Second operand 3 states. Result 11 states and 13 transitions. Complement of second has 5 states. [2020-10-20 06:34:21,670 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 06:34:21,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:34:21,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2020-10-20 06:34:21,670 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2020-10-20 06:34:21,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:21,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-20 06:34:21,671 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:21,671 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2020-10-20 06:34:21,672 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:21,672 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2020-10-20 06:34:21,673 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:21,673 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2020-10-20 06:34:21,673 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2020-10-20 06:34:21,674 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2020-10-20 06:34:21,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2020-10-20 06:34:21,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2020-10-20 06:34:21,674 INFO L691 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2020-10-20 06:34:21,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2020-10-20 06:34:21,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2020-10-20 06:34:21,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-10-20 06:34:21,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2020-10-20 06:34:21,676 INFO L714 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-20 06:34:21,676 INFO L594 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2020-10-20 06:34:21,676 INFO L427 BuchiCegarLoop]: ======== Iteration 4============ [2020-10-20 06:34:21,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2020-10-20 06:34:21,677 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2020-10-20 06:34:21,677 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2020-10-20 06:34:21,678 INFO L119 BuchiIsEmpty]: Starting construction of run [2020-10-20 06:34:21,678 INFO L852 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2020-10-20 06:34:21,678 INFO L853 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2020-10-20 06:34:21,678 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~x~0;havoc main_~x~0;main_~x~0 := main_#t~nondet0;havoc main_#t~nondet0; 203#L17-2 assume !!(0 != main_~x~0); 204#L17 assume main_~x~0 > 0;main_~x~0 := main_~x~0 - 1; 205#L17-2 assume !!(0 != main_~x~0); 206#L17 [2020-10-20 06:34:21,679 INFO L796 eck$LassoCheckResult]: Loop: 206#L17 assume !(main_~x~0 > 0);main_~x~0 := 1 + main_~x~0; 208#L17-2 assume !!(0 != main_~x~0); 206#L17 [2020-10-20 06:34:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2020-10-20 06:34:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:21,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090274185] [2020-10-20 06:34:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:21,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:21,686 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:21,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:21,689 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:21,690 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:21,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:21,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2020-10-20 06:34:21,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:21,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484317436] [2020-10-20 06:34:21,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:21,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:21,696 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:34:21,699 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:34:21,700 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:34:21,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:21,701 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2020-10-20 06:34:21,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:34:21,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114772327] [2020-10-20 06:34:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:34:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:21,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:34:21,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114772327] [2020-10-20 06:34:21,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:34:21,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:34:21,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151654778] [2020-10-20 06:34:21,755 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:21,755 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:21,755 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:21,755 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:21,755 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2020-10-20 06:34:21,755 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:21,755 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:21,755 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:21,755 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2020-10-20 06:34:21,756 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:21,756 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:21,757 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 06:34:21,761 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 06:34:21,768 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 06:34:21,890 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:21,890 INFO L404 LassoAnalysis]: Checking for nontermination... 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 06:34:21,897 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:21,897 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 06:34:21,901 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2020-10-20 06:34:21,901 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {v_rep~unnamed0~0~true_7=1} Honda state: {v_rep~unnamed0~0~true_7=1} Generalized eigenvectors: [] Lambdas: [] Nus: [] 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 06:34:21,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2020-10-20 06:34:21,924 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 06:34:21,952 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2020-10-20 06:34:21,952 INFO L160 nArgumentSynthesizer]: Using integer mode. [2020-10-20 06:34:22,054 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2020-10-20 06:34:22,057 INFO L210 LassoAnalysis]: Preferences: [2020-10-20 06:34:22,057 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2020-10-20 06:34:22,057 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2020-10-20 06:34:22,057 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2020-10-20 06:34:22,057 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2020-10-20 06:34:22,057 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:22,057 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2020-10-20 06:34:22,058 INFO L132 ssoRankerPreferences]: Path of dumped script: [2020-10-20 06:34:22,058 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a.c_Iteration4_Loop [2020-10-20 06:34:22,058 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2020-10-20 06:34:22,058 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2020-10-20 06:34:22,059 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 06:34:22,063 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 06:34:22,070 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 06:34:22,131 INFO L292 LassoAnalysis]: Preprocessing complete. [2020-10-20 06:34:22,132 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) [2020-10-20 06:34:22,144 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 06:34:22,145 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:22,146 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:22,146 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2020-10-20 06:34:22,146 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:22,148 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2020-10-20 06:34:22,149 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2020-10-20 06:34:22,161 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. Waiting until toolchain timeout for monitored process 28 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 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2020-10-20 06:34:22,192 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 06:34:22,194 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2020-10-20 06:34:22,194 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2020-10-20 06:34:22,194 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2020-10-20 06:34:22,194 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2020-10-20 06:34:22,194 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2020-10-20 06:34:22,196 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2020-10-20 06:34:22,196 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:22,199 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2020-10-20 06:34:22,203 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2020-10-20 06:34:22,203 INFO L444 ModelExtractionUtils]: 0 out of 3 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) [2020-10-20 06:34:22,206 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2020-10-20 06:34:22,206 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2020-10-20 06:34:22,206 INFO L510 LassoAnalysis]: Proved termination. [2020-10-20 06:34:22,206 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0) = -2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2020-10-20 06:34:22,237 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2020-10-20 06:34:22,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:22,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:34:22,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:22,265 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:22,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:22,299 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 06:34:22,300 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 06:34:22,300 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-10-20 06:34:22,304 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-10-20 06:34:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-10-20 06:34:22,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:34:22,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-10-20 06:34:22,305 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-20 06:34:22,306 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:22,306 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:34:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:34:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:22,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:22,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:22,348 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 06:34:22,348 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 06:34:22,348 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-10-20 06:34:22,353 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 7 states and 8 transitions. Complement of second has 3 states. [2020-10-20 06:34:22,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2020-10-20 06:34:22,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:34:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2020-10-20 06:34:22,354 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-20 06:34:22,354 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:22,355 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2020-10-20 06:34:22,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:34:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:22,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-20 06:34:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:34:22,375 WARN L261 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:34:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:34:22,394 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 06:34:22,395 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 06:34:22,395 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2020-10-20 06:34:22,412 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3. Second operand 3 states. Result 8 states and 9 transitions. Complement of second has 4 states. [2020-10-20 06:34:22,414 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 06:34:22,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2020-10-20 06:34:22,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2020-10-20 06:34:22,415 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2020-10-20 06:34:22,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:22,415 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2020-10-20 06:34:22,415 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:22,416 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2020-10-20 06:34:22,416 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2020-10-20 06:34:22,416 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2020-10-20 06:34:22,417 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:34:22,417 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2020-10-20 06:34:22,417 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:34:22,417 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:34:22,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:34:22,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:34:22,418 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:34:22,418 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:34:22,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:34:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:34:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:34:22,419 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2020-10-20 06:34:22,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:34:22,419 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2020-10-20 06:34:22,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 06:34:22,420 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2020-10-20 06:34:22,420 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:34:22,420 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:34:22,420 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2020-10-20 06:34:22,421 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2020-10-20 06:34:22,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2020-10-20 06:34:22,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-20 06:34:22,421 INFO L691 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:34:22,421 INFO L714 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:34:22,421 INFO L594 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:34:22,422 INFO L427 BuchiCegarLoop]: ======== Iteration 5============ [2020-10-20 06:34:22,422 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:34:22,422 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2020-10-20 06:34:22,422 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2020-10-20 06:34:22,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.10 06:34:22 BoogieIcfgContainer [2020-10-20 06:34:22,429 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2020-10-20 06:34:22,430 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:34:22,430 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:34:22,430 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:34:22,431 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:34:18" (3/4) ... [2020-10-20 06:34:22,434 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:34:22,435 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:34:22,438 INFO L168 Benchmark]: Toolchain (without parser) took 4071.29 ms. Allocated memory was 34.6 MB in the beginning and 55.1 MB in the end (delta: 20.4 MB). Free memory was 11.7 MB in the beginning and 12.3 MB in the end (delta: -680.4 kB). Peak memory consumption was 19.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,439 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 33.6 MB. Free memory was 18.6 MB in the beginning and 18.5 MB in the end (delta: 41.6 kB). Peak memory consumption was 41.6 kB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,440 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.48 ms. Allocated memory was 34.6 MB in the beginning and 42.5 MB in the end (delta: 7.9 MB). Free memory was 10.8 MB in the beginning and 26.9 MB in the end (delta: -16.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,441 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 42.5 MB. Free memory was 26.9 MB in the beginning and 25.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,441 INFO L168 Benchmark]: Boogie Preprocessor took 16.88 ms. Allocated memory is still 42.5 MB. Free memory was 25.4 MB in the beginning and 24.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,442 INFO L168 Benchmark]: RCFGBuilder took 195.59 ms. Allocated memory is still 42.5 MB. Free memory was 24.3 MB in the beginning and 15.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,443 INFO L168 Benchmark]: BuchiAutomizer took 3511.40 ms. Allocated memory was 42.5 MB in the beginning and 55.1 MB in the end (delta: 12.6 MB). Free memory was 15.7 MB in the beginning and 12.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:34:22,444 INFO L168 Benchmark]: Witness Printer took 4.81 ms. Allocated memory is still 55.1 MB. Free memory is still 12.3 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:34:22,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 33.6 MB. Free memory was 18.6 MB in the beginning and 18.5 MB in the end (delta: 41.6 kB). Peak memory consumption was 41.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 300.48 ms. Allocated memory was 34.6 MB in the beginning and 42.5 MB in the end (delta: 7.9 MB). Free memory was 10.8 MB in the beginning and 26.9 MB in the end (delta: -16.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 31.62 ms. Allocated memory is still 42.5 MB. Free memory was 26.9 MB in the beginning and 25.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.5 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 16.88 ms. Allocated memory is still 42.5 MB. Free memory was 25.4 MB in the beginning and 24.3 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.1 MB. Max. memory is 14.3 GB. * RCFGBuilder took 195.59 ms. Allocated memory is still 42.5 MB. Free memory was 24.3 MB in the beginning and 15.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 14.3 GB. * BuchiAutomizer took 3511.40 ms. Allocated memory was 42.5 MB in the beginning and 55.1 MB in the end (delta: 12.6 MB). Free memory was 15.7 MB in the beginning and 12.9 MB in the end (delta: 2.8 MB). Peak memory consumption was 15.4 MB. Max. memory is 14.3 GB. * Witness Printer took 4.81 ms. Allocated memory is still 55.1 MB. Free memory is still 12.3 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 6 terminating modules (2 trivial, 3 deterministic, 1 nondeterministic). One deterministic module has affine ranking function x and consists of 4 locations. One deterministic module has affine ranking function x and consists of 3 locations. One deterministic module has affine ranking function -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 1 and consists of 3 locations. 2 modules have a trivial ranking function, the largest among these consists of 4 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 2.8s. Construction of modules took 0.0s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 2. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 7 states and ocurred in iteration 1. Nontrivial modules had stage [3, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 20 SDtfs, 18 SDslu, 3 SDs, 0 SdLazy, 43 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT2 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax200 hnf98 lsp49 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq165 hnf94 smp100 dnf132 smp89 tf110 neg96 sie112 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 29ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 6 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.6s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...