./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c -s /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer --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 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 09:29:03,633 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 09:29:03,635 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 09:29:03,648 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 09:29:03,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 09:29:03,650 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 09:29:03,651 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 09:29:03,654 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 09:29:03,656 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 09:29:03,657 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 09:29:03,658 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 09:29:03,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 09:29:03,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 09:29:03,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 09:29:03,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 09:29:03,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 09:29:03,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 09:29:03,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 09:29:03,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 09:29:03,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 09:29:03,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 09:29:03,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 09:29:03,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 09:29:03,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 09:29:03,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 09:29:03,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 09:29:03,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 09:29:03,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 09:29:03,686 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 09:29:03,687 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 09:29:03,687 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 09:29:03,688 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 09:29:03,689 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 09:29:03,690 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 09:29:03,691 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 09:29:03,692 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 09:29:03,693 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 09:29:03,693 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 09:29:03,693 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 09:29:03,694 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 09:29:03,695 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 09:29:03,696 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 09:29:03,730 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 09:29:03,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 09:29:03,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 09:29:03,733 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 09:29:03,733 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 09:29:03,733 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 09:29:03,733 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 09:29:03,734 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 09:29:03,734 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 09:29:03,734 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 09:29:03,735 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 09:29:03,736 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 09:29:03,736 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 09:29:03,736 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 09:29:03,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 09:29:03,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 09:29:03,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 09:29:03,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 09:29:03,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 09:29:03,738 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 09:29:03,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 09:29:03,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 09:29:03,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 09:29:03,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 09:29:03,739 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 09:29:03,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 09:29:03,739 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 09:29:03,739 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 09:29:03,741 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 09:29:03,741 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer 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 -> 9a661b9ed427d2e9174ef6e6cb1f5d6d0ab8d9e2 [2019-11-20 09:29:03,948 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 09:29:03,961 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 09:29:03,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 09:29:03,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 09:29:03,968 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 09:29:03,968 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2019-11-20 09:29:04,034 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/data/e7c5b6b0a/946884f455ee47ba8ade05e3dc80be7a/FLAG418b0015b [2019-11-20 09:29:04,476 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 09:29:04,477 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/sv-benchmarks/c/termination-crafted-lit/CookSeeZuleger-TACAS2013-Fig8a-modified.c [2019-11-20 09:29:04,484 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/data/e7c5b6b0a/946884f455ee47ba8ade05e3dc80be7a/FLAG418b0015b [2019-11-20 09:29:04,808 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/data/e7c5b6b0a/946884f455ee47ba8ade05e3dc80be7a [2019-11-20 09:29:04,811 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 09:29:04,813 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 09:29:04,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 09:29:04,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 09:29:04,818 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 09:29:04,819 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:04" (1/1) ... [2019-11-20 09:29:04,822 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9beab21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:04, skipping insertion in model container [2019-11-20 09:29:04,823 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 09:29:04" (1/1) ... [2019-11-20 09:29:04,831 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 09:29:04,853 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 09:29:05,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:29:05,082 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 09:29:05,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 09:29:05,189 INFO L192 MainTranslator]: Completed translation [2019-11-20 09:29:05,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05 WrapperNode [2019-11-20 09:29:05,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 09:29:05,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 09:29:05,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 09:29:05,191 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 09:29:05,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,226 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 09:29:05,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 09:29:05,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 09:29:05,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 09:29:05,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,237 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... [2019-11-20 09:29:05,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 09:29:05,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 09:29:05,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 09:29:05,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 09:29:05,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/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 [2019-11-20 09:29:05,322 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 09:29:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 09:29:05,456 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 09:29:05,456 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-20 09:29:05,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:05 BoogieIcfgContainer [2019-11-20 09:29:05,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 09:29:05,458 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 09:29:05,458 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 09:29:05,462 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 09:29:05,463 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 09:29:05,463 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 09:29:04" (1/3) ... [2019-11-20 09:29:05,466 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@40d356b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 09:29:05, skipping insertion in model container [2019-11-20 09:29:05,467 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 09:29:05,467 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 09:29:05" (2/3) ... [2019-11-20 09:29:05,467 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@40d356b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 09:29:05, skipping insertion in model container [2019-11-20 09:29:05,467 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 09:29:05,468 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:05" (3/3) ... [2019-11-20 09:29:05,469 INFO L371 chiAutomizerObserver]: Analyzing ICFG CookSeeZuleger-TACAS2013-Fig8a-modified.c [2019-11-20 09:29:05,515 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 09:29:05,515 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 09:29:05,516 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 09:29:05,516 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 09:29:05,516 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 09:29:05,516 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 09:29:05,517 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 09:29:05,517 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 09:29:05,530 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-20 09:29:05,553 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:05,553 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:29:05,553 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:29:05,559 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-20 09:29:05,559 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:29:05,559 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 09:29:05,560 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states. [2019-11-20 09:29:05,560 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:05,561 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:29:05,561 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:29:05,561 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-20 09:29:05,561 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:29:05,570 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 5#L18-2true [2019-11-20 09:29:05,571 INFO L796 eck$LassoCheckResult]: Loop: 5#L18-2true assume !!(main_~x~0 != main_~K~0); 7#L18true assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 5#L18-2true [2019-11-20 09:29:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:05,576 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-20 09:29:05,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:05,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149701208] [2019-11-20 09:29:05,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:05,682 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:05,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 1 times [2019-11-20 09:29:05,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:05,683 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289321345] [2019-11-20 09:29:05,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:05,699 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:05,701 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-20 09:29:05,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:05,701 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173595743] [2019-11-20 09:29:05,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:05,715 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:05,782 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:05,783 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:05,783 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:05,784 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:05,784 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:29:05,784 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:05,784 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:05,784 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:05,785 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2019-11-20 09:29:05,785 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:05,785 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:05,811 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:05,823 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:05,829 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:05,969 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:05,969 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:05,976 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:05,977 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:29:05,989 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:29:05,990 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 /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/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 [2019-11-20 09:29:06,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:06,011 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:29:06,017 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:29:06,017 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 /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:06,026 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:06,026 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 /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/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 [2019-11-20 09:29:06,058 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:29:06,058 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:29:06,273 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:29:06,275 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:06,275 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:06,275 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:06,275 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:06,275 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:29:06,275 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:06,276 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:06,276 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:06,276 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration1_Loop [2019-11-20 09:29:06,276 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:06,276 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:06,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:06,310 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:06,318 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:06,402 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:06,408 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:06,427 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:06,430 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:29:06,431 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:29:06,432 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:29:06,432 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:29:06,432 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:29:06,436 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:29:06,436 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 09:29:06,441 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:29:06,450 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-20 09:29:06,450 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:06,472 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:29:06,472 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:29:06,474 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:29:06,474 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:06,482 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 09:29:06,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:06,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:29:06,529 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:06,540 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:06,541 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:06,563 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 [2019-11-20 09:29:06,565 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states. Second operand 3 states. [2019-11-20 09:29:06,621 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states.. Second operand 3 states. Result 23 states and 30 transitions. Complement of second has 6 states. [2019-11-20 09:29:06,622 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 09:29:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:29:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 11 transitions. [2019-11-20 09:29:06,626 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 2 letters. [2019-11-20 09:29:06,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:06,628 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-20 09:29:06,628 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:06,628 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 11 transitions. Stem has 1 letters. Loop has 4 letters. [2019-11-20 09:29:06,629 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:06,630 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 23 states and 30 transitions. [2019-11-20 09:29:06,633 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:06,638 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 23 states to 7 states and 10 transitions. [2019-11-20 09:29:06,639 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-20 09:29:06,640 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-20 09:29:06,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-11-20 09:29:06,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:29:06,641 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-20 09:29:06,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-11-20 09:29:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-20 09:29:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-20 09:29:06,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-11-20 09:29:06,669 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-20 09:29:06,670 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-20 09:29:06,670 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 09:29:06,670 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-11-20 09:29:06,670 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:06,670 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:29:06,671 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:29:06,671 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-20 09:29:06,671 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:29:06,672 INFO L794 eck$LassoCheckResult]: Stem: 68#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 69#L18-2 assume !!(main_~x~0 != main_~K~0); 67#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 63#L18-2 [2019-11-20 09:29:06,672 INFO L796 eck$LassoCheckResult]: Loop: 63#L18-2 assume !!(main_~x~0 != main_~K~0); 64#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 63#L18-2 [2019-11-20 09:29:06,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-20 09:29:06,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:06,673 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377399548] [2019-11-20 09:29:06,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:06,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:06,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:06,690 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:06,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:06,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1284, now seen corresponding path program 2 times [2019-11-20 09:29:06,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:06,693 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822140698] [2019-11-20 09:29:06,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:06,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:06,709 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:06,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:06,710 INFO L82 PathProgramCache]: Analyzing trace with hash 29865320, now seen corresponding path program 1 times [2019-11-20 09:29:06,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:06,711 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750610820] [2019-11-20 09:29:06,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:06,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750610820] [2019-11-20 09:29:06,773 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489430950] [2019-11-20 09:29:06,774 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2019-11-20 09:29:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:06,811 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:06,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 09:29:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:06,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 09:29:06,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-20 09:29:06,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421191614] [2019-11-20 09:29:06,865 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:06,865 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:06,866 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:06,866 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:06,866 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:29:06,866 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:06,866 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:06,866 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:06,866 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2019-11-20 09:29:06,866 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:06,866 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:06,868 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:06,883 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:06,891 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:06,955 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:06,955 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/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 [2019-11-20 09:29:06,960 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:06,960 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:29:06,966 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:29:06,967 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 /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:06,974 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:06,974 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:29:06,978 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:29:06,979 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 /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/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 [2019-11-20 09:29:06,991 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:06,991 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 12 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 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,010 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:29:07,011 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 09:29:07,215 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:29:07,217 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:07,217 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:07,217 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:07,217 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:07,218 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:29:07,218 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,218 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:07,218 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:07,218 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration2_Loop [2019-11-20 09:29:07,218 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:07,218 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:07,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:07,236 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:07,242 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:07,335 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:07,336 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,351 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 [2019-11-20 09:29:07,353 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:29:07,353 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:29:07,354 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:29:07,354 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:29:07,358 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:29:07,359 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,364 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,382 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 [2019-11-20 09:29:07,384 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:29:07,385 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:29:07,385 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:29:07,385 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:29:07,389 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-20 09:29:07,389 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,395 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,402 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 [2019-11-20 09:29:07,405 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:29:07,405 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:29:07,405 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:29:07,405 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 09:29:07,405 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:29:07,407 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 09:29:07,407 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 09:29:07,411 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:29:07,416 INFO L443 ModelExtractionUtils]: Simplification made 4 calls to the SMT solver. [2019-11-20 09:29:07,417 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,451 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:29:07,451 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:29:07,451 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:29:07,451 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = 1*ULTIMATE.start_main_~x~0 - 1*ULTIMATE.start_main_~K~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,454 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 09:29:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:07,480 INFO L255 TraceCheckSpWp]: Trace formula consists of 10 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:29:07,481 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:07,485 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:07,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:07,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:07,487 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 [2019-11-20 09:29:07,487 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-11-20 09:29:07,505 INFO L76 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. [2019-11-20 09:29:07,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 09:29:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:29:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 6 transitions. [2019-11-20 09:29:07,506 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 2 letters. [2019-11-20 09:29:07,507 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:07,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 5 letters. Loop has 2 letters. [2019-11-20 09:29:07,507 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:07,507 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 6 transitions. Stem has 3 letters. Loop has 4 letters. [2019-11-20 09:29:07,508 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:07,508 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 16 transitions. [2019-11-20 09:29:07,509 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:07,509 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 16 transitions. [2019-11-20 09:29:07,510 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-11-20 09:29:07,510 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-20 09:29:07,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 16 transitions. [2019-11-20 09:29:07,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:29:07,510 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-20 09:29:07,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 16 transitions. [2019-11-20 09:29:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-20 09:29:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-20 09:29:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 16 transitions. [2019-11-20 09:29:07,512 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 16 transitions. [2019-11-20 09:29:07,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:29:07,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:29:07,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:29:07,516 INFO L87 Difference]: Start difference. First operand 11 states and 16 transitions. Second operand 4 states. [2019-11-20 09:29:07,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:29:07,570 INFO L93 Difference]: Finished difference Result 10 states and 12 transitions. [2019-11-20 09:29:07,571 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 09:29:07,571 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 12 transitions. [2019-11-20 09:29:07,572 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:07,573 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 9 states and 11 transitions. [2019-11-20 09:29:07,573 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-20 09:29:07,573 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-20 09:29:07,573 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 11 transitions. [2019-11-20 09:29:07,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:29:07,574 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-20 09:29:07,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 11 transitions. [2019-11-20 09:29:07,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 6. [2019-11-20 09:29:07,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 09:29:07,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 8 transitions. [2019-11-20 09:29:07,575 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-20 09:29:07,576 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 8 transitions. [2019-11-20 09:29:07,576 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 09:29:07,576 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 8 transitions. [2019-11-20 09:29:07,576 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:07,577 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:29:07,577 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:29:07,577 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 09:29:07,577 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:29:07,578 INFO L794 eck$LassoCheckResult]: Stem: 157#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 158#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2019-11-20 09:29:07,578 INFO L796 eck$LassoCheckResult]: Loop: 154#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 153#L18-2 assume !!(main_~x~0 != main_~K~0); 154#L18 [2019-11-20 09:29:07,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:07,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-20 09:29:07,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:07,579 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624519594] [2019-11-20 09:29:07,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:07,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:07,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:07,598 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:07,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 1 times [2019-11-20 09:29:07,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:07,601 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872119177] [2019-11-20 09:29:07,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:07,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:07,620 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:07,621 INFO L82 PathProgramCache]: Analyzing trace with hash 963397, now seen corresponding path program 2 times [2019-11-20 09:29:07,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:07,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490388618] [2019-11-20 09:29:07,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:07,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:07,647 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:07,666 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:07,667 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:07,667 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:07,667 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:07,667 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:29:07,667 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,668 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:07,668 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:07,668 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2019-11-20 09:29:07,668 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:07,668 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:07,670 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:07,674 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:07,686 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:07,797 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:07,798 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,806 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:07,807 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:07,812 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 09:29:07,812 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 /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:07,829 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:07,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:29:07,855 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 [2019-11-20 09:29:10,486 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:29:10,489 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:10,489 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:10,489 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:10,489 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:10,489 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:29:10,490 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:10,490 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:10,490 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:10,490 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration3_Loop [2019-11-20 09:29:10,490 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:10,490 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:10,492 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:10,516 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:10,519 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:10,620 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:10,620 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:10,631 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 [2019-11-20 09:29:10,633 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:29:10,634 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:29:10,634 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:29:10,634 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 09:29:10,634 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:29:10,637 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-20 09:29:10,638 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:10,643 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:29:10,651 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 09:29:10,651 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:10,662 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:29:10,662 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:29:10,662 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:29:10,663 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~K~0, ULTIMATE.start_main_~x~0) = 2*ULTIMATE.start_main_~K~0 - 2*ULTIMATE.start_main_~x~0 + 1 Supporting invariants [] [2019-11-20 09:29:10,666 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:10,699 INFO L255 TraceCheckSpWp]: Trace formula consists of 7 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:29:10,700 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:10,706 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:10,706 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:10,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:10,731 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 [2019-11-20 09:29:10,731 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 8 transitions. cyclomatic complexity: 4 Second operand 3 states. [2019-11-20 09:29:10,749 INFO L76 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. [2019-11-20 09:29:10,751 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 09:29:10,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:29:10,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-20 09:29:10,751 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-20 09:29:10,752 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:10,752 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-20 09:29:10,752 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:10,752 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 4 letters. [2019-11-20 09:29:10,752 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:10,753 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 13 transitions. [2019-11-20 09:29:10,754 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:10,754 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 7 states and 8 transitions. [2019-11-20 09:29:10,754 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 4 [2019-11-20 09:29:10,754 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 4 [2019-11-20 09:29:10,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-11-20 09:29:10,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 09:29:10,755 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-20 09:29:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-11-20 09:29:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 6. [2019-11-20 09:29:10,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-20 09:29:10,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-11-20 09:29:10,756 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-20 09:29:10,756 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-20 09:29:10,757 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 09:29:10,757 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-11-20 09:29:10,757 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 2 [2019-11-20 09:29:10,758 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 09:29:10,758 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 09:29:10,759 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1] [2019-11-20 09:29:10,759 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1] [2019-11-20 09:29:10,759 INFO L794 eck$LassoCheckResult]: Stem: 207#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~K~0, main_~x~0;havoc main_~K~0;havoc main_~x~0;main_~K~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x~0 := main_#t~nondet1;havoc main_#t~nondet1; 203#L18-2 assume !!(main_~x~0 != main_~K~0); 204#L18 assume main_~x~0 > main_~K~0;main_~x~0 := main_~x~0 - 1; 205#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2019-11-20 09:29:10,759 INFO L796 eck$LassoCheckResult]: Loop: 206#L18 assume !(main_~x~0 > main_~K~0);main_~x~0 := 1 + main_~x~0; 208#L18-2 assume !!(main_~x~0 != main_~K~0); 206#L18 [2019-11-20 09:29:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:10,760 INFO L82 PathProgramCache]: Analyzing trace with hash 963335, now seen corresponding path program 2 times [2019-11-20 09:29:10,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:10,761 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961643975] [2019-11-20 09:29:10,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:10,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:10,785 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1436, now seen corresponding path program 2 times [2019-11-20 09:29:10,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:10,787 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72072502] [2019-11-20 09:29:10,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 09:29:10,798 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 09:29:10,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:10,799 INFO L82 PathProgramCache]: Analyzing trace with hash 925765410, now seen corresponding path program 2 times [2019-11-20 09:29:10,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 09:29:10,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214059547] [2019-11-20 09:29:10,800 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 09:29:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:10,879 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214059547] [2019-11-20 09:29:10,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 09:29:10,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 09:29:10,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713572916] [2019-11-20 09:29:10,913 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:10,913 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:10,913 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:10,913 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:10,913 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 09:29:10,913 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:10,914 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:10,914 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:10,914 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2019-11-20 09:29:10,914 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:10,914 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:10,916 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:10,928 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:10,938 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:11,066 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:11,066 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 09:29:11,098 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 09:29:11,099 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:11,126 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 09:29:11,127 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:14,126 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 09:29:14,128 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 09:29:14,129 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 09:29:14,129 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 09:29:14,129 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 09:29:14,129 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 09:29:14,129 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:14,129 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 09:29:14,129 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 09:29:14,129 INFO L133 ssoRankerPreferences]: Filename of dumped script: CookSeeZuleger-TACAS2013-Fig8a-modified.c_Iteration4_Loop [2019-11-20 09:29:14,129 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 09:29:14,130 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 09:29:14,131 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:14,150 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:14,154 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 09:29:14,264 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 09:29:14,264 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:14,274 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 [2019-11-20 09:29:14,276 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 09:29:14,276 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 09:29:14,276 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 09:29:14,276 INFO L204 nArgumentSynthesizer]: 2 loop disjuncts [2019-11-20 09:29:14,276 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 09:29:14,280 INFO L401 nArgumentSynthesizer]: We have 4 Motzkin's Theorem applications. [2019-11-20 09:29:14,280 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:14,292 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 09:29:14,296 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 09:29:14,296 INFO L444 ModelExtractionUtils]: 0 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_9f16013c-5d1a-46dd-9784-1d7de2879986/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 09:29:14,306 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 09:29:14,307 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 09:29:14,307 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 09:29:14,307 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x~0, ULTIMATE.start_main_~K~0) = -2*ULTIMATE.start_main_~x~0 + 2*ULTIMATE.start_main_~K~0 + 1 Supporting invariants [] [2019-11-20 09:29:14,311 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 09:29:14,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:14,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:14,339 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:29:14,340 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:14,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:14,345 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:14,345 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:14,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:14,365 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 [2019-11-20 09:29:14,365 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-20 09:29:14,370 INFO L76 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. [2019-11-20 09:29:14,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-20 09:29:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:29:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-20 09:29:14,372 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-20 09:29:14,372 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:14,372 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 09:29:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:14,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:29:14,401 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:14,407 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:14,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:14,425 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 [2019-11-20 09:29:14,425 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-20 09:29:14,432 INFO L76 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. [2019-11-20 09:29:14,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 2 states 1 stem states 0 non-accepting loop states 1 accepting loop states [2019-11-20 09:29:14,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:29:14,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 2 transitions. [2019-11-20 09:29:14,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 2 states and 2 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-20 09:29:14,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:14,433 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 09:29:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:29:14,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:14,453 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 09:29:14,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:14,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:29:14,458 WARN L253 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 09:29:14,458 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:29:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 09:29:14,485 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 [2019-11-20 09:29:14,485 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 6 states and 7 transitions. cyclomatic complexity: 3 Second operand 3 states. [2019-11-20 09:29:14,498 INFO L76 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. [2019-11-20 09:29:14,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 3 states 1 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 09:29:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-20 09:29:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 8 transitions. [2019-11-20 09:29:14,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 2 letters. [2019-11-20 09:29:14,500 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:14,500 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 6 letters. Loop has 2 letters. [2019-11-20 09:29:14,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:14,501 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 8 transitions. Stem has 4 letters. Loop has 4 letters. [2019-11-20 09:29:14,501 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 09:29:14,502 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-11-20 09:29:14,503 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 09:29:14,503 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 0 states and 0 transitions. [2019-11-20 09:29:14,503 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 09:29:14,503 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 09:29:14,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 09:29:14,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 09:29:14,503 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 09:29:14,504 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 09:29:14,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 09:29:14,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 09:29:14,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 09:29:14,504 INFO L87 Difference]: Start difference. First operand 0 states and 0 transitions. Second operand 4 states. [2019-11-20 09:29:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:29:14,504 INFO L93 Difference]: Finished difference Result 0 states and 0 transitions. [2019-11-20 09:29:14,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-20 09:29:14,505 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 0 states and 0 transitions. [2019-11-20 09:29:14,505 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 09:29:14,505 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 09:29:14,505 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 09:29:14,505 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 09:29:14,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 09:29:14,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 09:29:14,506 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 09:29:14,506 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 09:29:14,506 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 09:29:14,506 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-20 09:29:14,506 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 09:29:14,506 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 09:29:14,506 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 09:29:14,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 09:29:14 BoogieIcfgContainer [2019-11-20 09:29:14,515 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 09:29:14,515 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 09:29:14,515 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 09:29:14,516 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 09:29:14,517 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 09:29:05" (3/4) ... [2019-11-20 09:29:14,527 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 09:29:14,527 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 09:29:14,530 INFO L168 Benchmark]: Toolchain (without parser) took 9716.05 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -123.6 MB). Peak memory consumption was 13.2 MB. Max. memory is 11.5 GB. [2019-11-20 09:29:14,530 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:29:14,531 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -186.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. [2019-11-20 09:29:14,532 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:29:14,538 INFO L168 Benchmark]: Boogie Preprocessor took 18.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:29:14,539 INFO L168 Benchmark]: RCFGBuilder took 212.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. [2019-11-20 09:29:14,539 INFO L168 Benchmark]: BuchiAutomizer took 9057.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 11.5 GB. [2019-11-20 09:29:14,540 INFO L168 Benchmark]: Witness Printer took 11.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:29:14,553 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 376.21 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.8 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -186.8 MB). Peak memory consumption was 23.2 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.55 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.21 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 212.50 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 9057.07 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 44.8 MB). Peak memory consumption was 44.8 MB. Max. memory is 11.5 GB. * Witness Printer took 11.73 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 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 + -1 * K and consists of 4 locations. One deterministic module has affine ranking function x + -1 * K and consists of 3 locations. One deterministic module has affine ranking function 2 * K + -2 * x + 1 and consists of 3 locations. One nondeterministic module has affine ranking function -2 * x + 2 * K + 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 9.0s and 5 iterations. TraceHistogramMax:2. Analysis of lassos took 8.3s. Construction of modules took 0.0s. Büchi inclusion checks took 0.4s. 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: 28ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 4 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 6.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...