./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-restricted-15/Ex06.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-restricted-15/Ex06.c -s /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/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 3ac2445d235ff9d71a6974ac9afce215f9983492 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(TERM) --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-11-15 23:25:00,665 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-15 23:25:00,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-15 23:25:00,682 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-15 23:25:00,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-15 23:25:00,683 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-15 23:25:00,685 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-15 23:25:00,694 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-15 23:25:00,698 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-15 23:25:00,703 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-15 23:25:00,704 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-15 23:25:00,705 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-15 23:25:00,705 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-15 23:25:00,708 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-15 23:25:00,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-15 23:25:00,710 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-15 23:25:00,710 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-15 23:25:00,711 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-15 23:25:00,713 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-15 23:25:00,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-15 23:25:00,720 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-15 23:25:00,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-15 23:25:00,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-15 23:25:00,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-15 23:25:00,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-15 23:25:00,728 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-15 23:25:00,729 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-15 23:25:00,730 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-15 23:25:00,731 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-15 23:25:00,731 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-15 23:25:00,732 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-15 23:25:00,732 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-15 23:25:00,733 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-15 23:25:00,733 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-15 23:25:00,735 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-15 23:25:00,735 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-15 23:25:00,736 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-15 23:25:00,736 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-15 23:25:00,736 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-15 23:25:00,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-15 23:25:00,738 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-15 23:25:00,739 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-15 23:25:00,766 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-15 23:25:00,775 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-15 23:25:00,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-15 23:25:00,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-15 23:25:00,777 INFO L138 SettingsManager]: * Use SBE=true [2019-11-15 23:25:00,777 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-15 23:25:00,778 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-15 23:25:00,778 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-15 23:25:00,778 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-15 23:25:00,778 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-15 23:25:00,779 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-15 23:25:00,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-15 23:25:00,779 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-15 23:25:00,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-15 23:25:00,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-15 23:25:00,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-15 23:25:00,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-15 23:25:00,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-15 23:25:00,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-15 23:25:00,785 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-15 23:25:00,785 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-15 23:25:00,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-15 23:25:00,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-15 23:25:00,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-15 23:25:00,786 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-15 23:25:00,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-15 23:25:00,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-15 23:25:00,787 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-15 23:25:00,788 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-15 23:25:00,788 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_b4b9a051-9535-41f1-97c8-724e4e874dfc/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 -> 3ac2445d235ff9d71a6974ac9afce215f9983492 [2019-11-15 23:25:00,812 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-15 23:25:00,822 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-15 23:25:00,826 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-15 23:25:00,827 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-15 23:25:00,828 INFO L275 PluginConnector]: CDTParser initialized [2019-11-15 23:25:00,828 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/../../sv-benchmarks/c/termination-restricted-15/Ex06.c [2019-11-15 23:25:00,894 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/data/2950a6b99/a680698978db4b4c869d8085eecfa989/FLAG9ceb984b0 [2019-11-15 23:25:01,311 INFO L306 CDTParser]: Found 1 translation units. [2019-11-15 23:25:01,312 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/sv-benchmarks/c/termination-restricted-15/Ex06.c [2019-11-15 23:25:01,317 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/data/2950a6b99/a680698978db4b4c869d8085eecfa989/FLAG9ceb984b0 [2019-11-15 23:25:01,334 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/data/2950a6b99/a680698978db4b4c869d8085eecfa989 [2019-11-15 23:25:01,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-15 23:25:01,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-15 23:25:01,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-15 23:25:01,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-15 23:25:01,346 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-15 23:25:01,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@330eb8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01, skipping insertion in model container [2019-11-15 23:25:01,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,358 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-15 23:25:01,375 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-15 23:25:01,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:25:01,578 INFO L188 MainTranslator]: Completed pre-run [2019-11-15 23:25:01,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-15 23:25:01,610 INFO L192 MainTranslator]: Completed translation [2019-11-15 23:25:01,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01 WrapperNode [2019-11-15 23:25:01,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-15 23:25:01,611 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-15 23:25:01,611 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-15 23:25:01,611 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-15 23:25:01,620 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,624 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-15 23:25:01,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-15 23:25:01,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-15 23:25:01,641 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-15 23:25:01,649 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,649 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... [2019-11-15 23:25:01,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-15 23:25:01,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-15 23:25:01,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-15 23:25:01,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-15 23:25:01,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/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 [2019-11-15 23:25:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-15 23:25:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-15 23:25:01,892 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-15 23:25:01,893 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-15 23:25:01,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:25:01 BoogieIcfgContainer [2019-11-15 23:25:01,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-15 23:25:01,895 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-15 23:25:01,895 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-15 23:25:01,898 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-15 23:25:01,899 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 23:25:01,899 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 15.11 11:25:01" (1/3) ... [2019-11-15 23:25:01,900 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27780e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.11 11:25:01, skipping insertion in model container [2019-11-15 23:25:01,900 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 23:25:01,900 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.11 11:25:01" (2/3) ... [2019-11-15 23:25:01,903 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@27780e7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 15.11 11:25:01, skipping insertion in model container [2019-11-15 23:25:01,903 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-15 23:25:01,903 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:25:01" (3/3) ... [2019-11-15 23:25:01,905 INFO L371 chiAutomizerObserver]: Analyzing ICFG Ex06.c [2019-11-15 23:25:01,956 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-15 23:25:01,956 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-15 23:25:01,956 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-15 23:25:01,957 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-15 23:25:01,957 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-15 23:25:01,957 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-15 23:25:01,957 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-15 23:25:01,957 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-15 23:25:01,971 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-15 23:25:01,990 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-15 23:25:01,990 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 23:25:01,991 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 23:25:01,997 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-15 23:25:01,997 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 23:25:01,997 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-15 23:25:01,997 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-15 23:25:01,998 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-15 23:25:01,999 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 23:25:01,999 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 23:25:01,999 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-15 23:25:01,999 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 23:25:02,006 INFO L791 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 5#L13-1true [2019-11-15 23:25:02,007 INFO L793 eck$LassoCheckResult]: Loop: 5#L13-1true assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 3#L10true assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 9#L10-2true assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 5#L13-1true [2019-11-15 23:25:02,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,013 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-15 23:25:02,021 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,021 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419731730] [2019-11-15 23:25:02,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,021 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,092 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,093 INFO L82 PathProgramCache]: Analyzing trace with hash 39823, now seen corresponding path program 1 times [2019-11-15 23:25:02,093 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519715251] [2019-11-15 23:25:02,093 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:25:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:25:02,156 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519715251] [2019-11-15 23:25:02,157 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-15 23:25:02,157 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-15 23:25:02,157 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061149661] [2019-11-15 23:25:02,161 INFO L808 eck$LassoCheckResult]: loop already infeasible [2019-11-15 23:25:02,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-15 23:25:02,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-15 23:25:02,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-15 23:25:02,192 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-15 23:25:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-15 23:25:02,261 INFO L93 Difference]: Finished difference Result 15 states and 18 transitions. [2019-11-15 23:25:02,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-15 23:25:02,264 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 15 states and 18 transitions. [2019-11-15 23:25:02,265 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-15 23:25:02,269 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 15 states to 7 states and 10 transitions. [2019-11-15 23:25:02,270 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-15 23:25:02,270 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-15 23:25:02,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 10 transitions. [2019-11-15 23:25:02,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-15 23:25:02,274 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-15 23:25:02,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 10 transitions. [2019-11-15 23:25:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-15 23:25:02,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-15 23:25:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 10 transitions. [2019-11-15 23:25:02,300 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-15 23:25:02,300 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 10 transitions. [2019-11-15 23:25:02,300 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-15 23:25:02,300 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 10 transitions. [2019-11-15 23:25:02,302 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-15 23:25:02,302 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 23:25:02,302 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 23:25:02,302 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-15 23:25:02,303 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 23:25:02,303 INFO L791 eck$LassoCheckResult]: Stem: 35#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 36#L13-1 [2019-11-15 23:25:02,303 INFO L793 eck$LassoCheckResult]: Loop: 36#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 32#L10 assume !(main_~i~0 > 0); 34#L10-2 assume main_~i~0 < 0;main_~i~0 := 1 + main_~i~0; 36#L13-1 [2019-11-15 23:25:02,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,304 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2019-11-15 23:25:02,304 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,304 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21819435] [2019-11-15 23:25:02,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,305 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,305 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,311 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 39885, now seen corresponding path program 1 times [2019-11-15 23:25:02,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,312 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437149523] [2019-11-15 23:25:02,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,312 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,321 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash 963406, now seen corresponding path program 1 times [2019-11-15 23:25:02,322 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,322 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42584662] [2019-11-15 23:25:02,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,332 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,398 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 23:25:02,399 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 23:25:02,399 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 23:25:02,400 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 23:25:02,400 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 23:25:02,400 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:02,400 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 23:25:02,400 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 23:25:02,400 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration2_Loop [2019-11-15 23:25:02,400 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 23:25:02,401 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 23:25:02,418 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,435 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,439 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,520 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 23:25:02,521 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/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) [2019-11-15 23:25:02,529 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 23:25:02,530 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/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 [2019-11-15 23:25:02,547 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 23:25:02,547 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 23:25:02,555 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 23:25:02,561 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 23:25:02,561 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 23:25:02,562 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 23:25:02,562 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 23:25:02,562 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 23:25:02,562 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:02,562 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 23:25:02,562 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 23:25:02,562 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration2_Loop [2019-11-15 23:25:02,562 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 23:25:02,562 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 23:25:02,564 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,575 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,579 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,645 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 23:25:02,650 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 23:25:02,651 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 [2019-11-15 23:25:02,652 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 23:25:02,653 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 23:25:02,653 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 23:25:02,653 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 23:25:02,653 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 23:25:02,656 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 23:25:02,656 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 23:25:02,676 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 23:25:02,681 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-15 23:25:02,682 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-11-15 23:25:02,683 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 23:25:02,684 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-15 23:25:02,684 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 23:25:02,685 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = -1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-15 23:25:02,688 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-15 23:25:02,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:25:02,719 WARN L254 TraceCheckSpWp]: Trace formula consists of 4 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:25:02,721 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:25:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:25:02,733 WARN L254 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:25:02,734 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:25:02,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:25:02,757 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 [2019-11-15 23:25:02,758 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5 Second operand 4 states. [2019-11-15 23:25:02,816 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 7 states and 10 transitions. cyclomatic complexity: 5. Second operand 4 states. Result 19 states and 26 transitions. Complement of second has 8 states. [2019-11-15 23:25:02,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-15 23:25:02,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-15 23:25:02,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 12 transitions. [2019-11-15 23:25:02,820 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 3 letters. [2019-11-15 23:25:02,821 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 23:25:02,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 4 letters. Loop has 3 letters. [2019-11-15 23:25:02,822 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 23:25:02,822 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 12 transitions. Stem has 1 letters. Loop has 6 letters. [2019-11-15 23:25:02,822 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 23:25:02,823 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 19 states and 26 transitions. [2019-11-15 23:25:02,824 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-15 23:25:02,829 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 19 states to 13 states and 17 transitions. [2019-11-15 23:25:02,830 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-11-15 23:25:02,830 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-15 23:25:02,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 17 transitions. [2019-11-15 23:25:02,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 23:25:02,831 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 17 transitions. [2019-11-15 23:25:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 17 transitions. [2019-11-15 23:25:02,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2019-11-15 23:25:02,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-15 23:25:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2019-11-15 23:25:02,835 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-15 23:25:02,835 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 16 transitions. [2019-11-15 23:25:02,836 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-15 23:25:02,836 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 16 transitions. [2019-11-15 23:25:02,837 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-15 23:25:02,838 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 23:25:02,838 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 23:25:02,838 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-15 23:25:02,838 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 23:25:02,839 INFO L791 eck$LassoCheckResult]: Stem: 99#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 100#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 104#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 106#L10-2 [2019-11-15 23:25:02,839 INFO L793 eck$LassoCheckResult]: Loop: 106#L10-2 assume !(main_~i~0 < 0); 101#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 102#L10 assume main_~i~0 > 0;main_~i~0 := main_~i~0 - 1; 106#L10-2 [2019-11-15 23:25:02,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,839 INFO L82 PathProgramCache]: Analyzing trace with hash 31075, now seen corresponding path program 1 times [2019-11-15 23:25:02,839 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,840 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725819340] [2019-11-15 23:25:02,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,840 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,860 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash 50295, now seen corresponding path program 1 times [2019-11-15 23:25:02,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495894924] [2019-11-15 23:25:02,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,877 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 925775829, now seen corresponding path program 1 times [2019-11-15 23:25:02,879 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:02,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056771586] [2019-11-15 23:25:02,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:02,883 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:02,908 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:02,937 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 23:25:02,937 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 23:25:02,937 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 23:25:02,937 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 23:25:02,937 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-11-15 23:25:02,937 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:02,937 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 23:25:02,938 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 23:25:02,938 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration3_Loop [2019-11-15 23:25:02,938 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 23:25:02,938 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 23:25:02,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,945 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:02,948 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:03,002 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 23:25:03,002 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/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) [2019-11-15 23:25:03,007 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 23:25:03,007 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 [2019-11-15 23:25:03,015 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 23:25:03,015 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_b4b9a051-9535-41f1-97c8-724e4e874dfc/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) [2019-11-15 23:25:03,025 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 23:25:03,026 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:03,033 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-15 23:25:03,033 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_b4b9a051-9535-41f1-97c8-724e4e874dfc/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) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:03,043 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-15 23:25:03,043 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/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) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:03,053 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-15 23:25:03,053 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-15 23:25:03,058 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-15 23:25:03,065 INFO L210 LassoAnalysis]: Preferences: [2019-11-15 23:25:03,065 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-11-15 23:25:03,065 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-15 23:25:03,065 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-11-15 23:25:03,065 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-11-15 23:25:03,065 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-15 23:25:03,066 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-15 23:25:03,066 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-11-15 23:25:03,066 INFO L131 ssoRankerPreferences]: Filename of dumped script: Ex06.c_Iteration3_Loop [2019-11-15 23:25:03,066 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-15 23:25:03,066 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-15 23:25:03,067 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:03,071 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:03,075 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-15 23:25:03,142 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-15 23:25:03,142 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-11-15 23:25:03,142 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 [2019-11-15 23:25:03,143 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 23:25:03,144 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 23:25:03,144 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 23:25:03,144 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 23:25:03,146 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 23:25:03,146 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 23:25:03,150 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 23:25:03,151 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 [2019-11-15 23:25:03,151 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 23:25:03,151 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 23:25:03,152 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 23:25:03,152 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 23:25:03,158 INFO L400 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-15 23:25:03,158 INFO L401 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-15 23:25:03,173 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-11-15 23:25:03,174 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 [2019-11-15 23:25:03,175 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-11-15 23:25:03,175 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-15 23:25:03,175 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-15 23:25:03,175 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-15 23:25:03,175 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-15 23:25:03,177 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-15 23:25:03,177 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-15 23:25:03,195 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-15 23:25:03,202 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-15 23:25:03,202 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-11-15 23:25:03,202 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-15 23:25:03,202 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-15 23:25:03,203 INFO L510 LassoAnalysis]: Proved termination. [2019-11-15 23:25:03,203 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~i~0) = 1*ULTIMATE.start_main_~i~0 Supporting invariants [] [2019-11-15 23:25:03,203 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-15 23:25:03,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:25:03,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-15 23:25:03,223 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:25:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-15 23:25:03,228 WARN L254 TraceCheckSpWp]: Trace formula consists of 8 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-15 23:25:03,228 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-15 23:25:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-15 23:25:03,244 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 [2019-11-15 23:25:03,244 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7 Second operand 3 states. [2019-11-15 23:25:03,269 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 12 states and 16 transitions. cyclomatic complexity: 7. Second operand 3 states. Result 18 states and 24 transitions. Complement of second has 4 states. [2019-11-15 23:25:03,270 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 [2019-11-15 23:25:03,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-15 23:25:03,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 11 transitions. [2019-11-15 23:25:03,271 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-11-15 23:25:03,271 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 23:25:03,271 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-11-15 23:25:03,271 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 23:25:03,271 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-11-15 23:25:03,272 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-15 23:25:03,272 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 24 transitions. [2019-11-15 23:25:03,273 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 6 [2019-11-15 23:25:03,274 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 18 states and 24 transitions. [2019-11-15 23:25:03,274 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-11-15 23:25:03,274 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-11-15 23:25:03,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 24 transitions. [2019-11-15 23:25:03,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-15 23:25:03,274 INFO L688 BuchiCegarLoop]: Abstraction has 18 states and 24 transitions. [2019-11-15 23:25:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states and 24 transitions. [2019-11-15 23:25:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 14. [2019-11-15 23:25:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-15 23:25:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 20 transitions. [2019-11-15 23:25:03,277 INFO L711 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-15 23:25:03,277 INFO L591 BuchiCegarLoop]: Abstraction has 14 states and 20 transitions. [2019-11-15 23:25:03,277 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-15 23:25:03,277 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 14 states and 20 transitions. [2019-11-15 23:25:03,278 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-15 23:25:03,278 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-15 23:25:03,278 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-15 23:25:03,279 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-11-15 23:25:03,279 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-15 23:25:03,279 INFO L791 eck$LassoCheckResult]: Stem: 168#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_~i~0;havoc main_~i~0;main_~i~0 := main_#t~nondet0;havoc main_#t~nondet0; 169#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 176#L10 assume !(main_~i~0 > 0); 164#L10-2 [2019-11-15 23:25:03,279 INFO L793 eck$LassoCheckResult]: Loop: 164#L10-2 assume !(main_~i~0 < 0); 170#L13-1 assume !!(main_~i~0 >= -5 && main_~i~0 <= 5); 163#L10 assume !(main_~i~0 > 0); 164#L10-2 [2019-11-15 23:25:03,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:03,279 INFO L82 PathProgramCache]: Analyzing trace with hash 31077, now seen corresponding path program 1 times [2019-11-15 23:25:03,279 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:03,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065218529] [2019-11-15 23:25:03,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:03,280 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:03,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:03,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:03,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:03,298 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash 50297, now seen corresponding path program 1 times [2019-11-15 23:25:03,299 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:03,299 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63319745] [2019-11-15 23:25:03,299 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:03,299 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:03,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:03,305 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:03,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-15 23:25:03,305 INFO L82 PathProgramCache]: Analyzing trace with hash 925835413, now seen corresponding path program 1 times [2019-11-15 23:25:03,305 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-11-15 23:25:03,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518730220] [2019-11-15 23:25:03,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:03,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-11-15 23:25:03,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-15 23:25:03,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:03,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-15 23:25:03,326 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-15 23:25:03,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 15.11 11:25:03 BoogieIcfgContainer [2019-11-15 23:25:03,385 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-15 23:25:03,386 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-15 23:25:03,386 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-15 23:25:03,386 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-15 23:25:03,387 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.11 11:25:01" (3/4) ... [2019-11-15 23:25:03,390 INFO L134 WitnessPrinter]: Generating witness for non-termination counterexample [2019-11-15 23:25:03,428 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b4b9a051-9535-41f1-97c8-724e4e874dfc/bin/uautomizer/witness.graphml [2019-11-15 23:25:03,428 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-15 23:25:03,430 INFO L168 Benchmark]: Toolchain (without parser) took 2089.15 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 941.0 MB in the beginning and 982.3 MB in the end (delta: -41.2 MB). Peak memory consumption was 105.1 MB. Max. memory is 11.5 GB. [2019-11-15 23:25:03,430 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:25:03,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -200.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-15 23:25:03,431 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.53 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. [2019-11-15 23:25:03,432 INFO L168 Benchmark]: Boogie Preprocessor took 15.26 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. [2019-11-15 23:25:03,432 INFO L168 Benchmark]: RCFGBuilder took 237.87 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. [2019-11-15 23:25:03,433 INFO L168 Benchmark]: BuchiAutomizer took 1490.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 982.3 MB in the end (delta: 140.6 MB). Peak memory consumption was 140.6 MB. Max. memory is 11.5 GB. [2019-11-15 23:25:03,433 INFO L168 Benchmark]: Witness Printer took 41.96 ms. Allocated memory is still 1.2 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-15 23:25:03,435 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 963.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 267.38 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 146.3 MB). Free memory was 941.0 MB in the beginning and 1.1 GB in the end (delta: -200.1 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.53 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 15.26 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 237.87 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 1490.85 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 982.3 MB in the end (delta: 140.6 MB). Peak memory consumption was 140.6 MB. Max. memory is 11.5 GB. * Witness Printer took 41.96 ms. Allocated memory is still 1.2 GB. Free memory is still 982.3 MB. 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 3 terminating modules (1 trivial, 2 deterministic, 0 nondeterministic) and one nonterminating remainder module.One deterministic module has affine ranking function -1 * i and consists of 5 locations. One deterministic module has affine ranking function i and consists of 3 locations. 1 modules have a trivial ranking function, the largest among these consists of 3 locations. The remainder module has 14 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 1.4s and 4 iterations. TraceHistogramMax:1. Analysis of lassos took 1.0s. Construction of modules took 0.0s. Büchi inclusion checks took 0.2s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 14 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 0, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 19 SDtfs, 19 SDslu, 3 SDs, 0 SdLazy, 34 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time LassoAnalysisResults: nont1 unkn0 SFLI1 SFLT2 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax186 hnf100 lsp53 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq143 hnf94 smp100 dnf100 smp100 tf110 neg100 sie109 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 7ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 2 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 2 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.0s - TerminationAnalysisResult: Nontermination possible Buchi Automizer proved that your program is nonterminating for some inputs - FixpointNonTerminationResult [Line: 13]: Nontermination argument in form of an infinite program execution. Nontermination argument in form of an infinite execution State at position 0 is {} State at position 1 is {org.eclipse.cdt.internal.core.dom.parser.c.CASTFunctionCallExpression@3062f9db=0, \result=0, i=0} - StatisticsResult: NonterminationArgumentStatistics Fixpoint - NonterminatingLassoResult [Line: 9]: Nonterminating execution Found a nonterminating execution for the following lasso shaped sequence of statements. Stem: [L6] int i; [L7] i = __VERIFIER_nondet_int() [L9] COND TRUE i >= -5 && i <= 5 [L10] COND FALSE !(i > 0) Loop: [L13] COND FALSE !(i < 0) [L9] COND TRUE i >= -5 && i <= 5 [L10] COND FALSE !(i > 0) End of lasso representation. RESULT: Ultimate proved your program to be incorrect! Received shutdown request...