./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 6b5699aa Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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 31d0c4253184c01eb9f9573658b07bed7aa94585 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-6b5699a [2019-11-25 08:48:08,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:48:08,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:48:08,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:48:08,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:48:08,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:48:08,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:48:08,096 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:48:08,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:48:08,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:48:08,106 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:48:08,107 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:48:08,108 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:48:08,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:48:08,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:48:08,112 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:48:08,113 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:48:08,113 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:48:08,116 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:48:08,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:48:08,122 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:48:08,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:48:08,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:48:08,127 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:48:08,129 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:48:08,129 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:48:08,129 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:48:08,131 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:48:08,131 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:48:08,132 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:48:08,132 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:48:08,133 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:48:08,134 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:48:08,134 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:48:08,135 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:48:08,135 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:48:08,136 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:48:08,136 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:48:08,136 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:48:08,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:48:08,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:48:08,138 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-25 08:48:08,163 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:48:08,172 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:48:08,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:48:08,174 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:48:08,174 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:48:08,174 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-25 08:48:08,174 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-25 08:48:08,175 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-25 08:48:08,175 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-25 08:48:08,175 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-25 08:48:08,175 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-25 08:48:08,175 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:48:08,176 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:48:08,176 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:48:08,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:48:08,177 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-25 08:48:08,177 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-25 08:48:08,177 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-25 08:48:08,177 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-25 08:48:08,178 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-25 08:48:08,178 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:48:08,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-25 08:48:08,178 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:48:08,178 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:48:08,179 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-25 08:48:08,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:48:08,179 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-25 08:48:08,179 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-25 08:48:08,180 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-25 08:48:08,181 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_bfe3c99d-30db-4d72-9a3c-60f625609ace/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 -> 31d0c4253184c01eb9f9573658b07bed7aa94585 [2019-11-25 08:48:08,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:48:08,349 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:48:08,352 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:48:08,353 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:48:08,353 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:48:08,354 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/../../sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2019-11-25 08:48:08,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/data/967a8d697/40a48e081f7e41339a8463751408a1a5/FLAGb2d121ff1 [2019-11-25 08:48:08,776 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:48:08,776 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/sv-benchmarks/c/termination-crafted-lit/Urban-WST2013-Fig2.c [2019-11-25 08:48:08,781 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/data/967a8d697/40a48e081f7e41339a8463751408a1a5/FLAGb2d121ff1 [2019-11-25 08:48:09,205 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/data/967a8d697/40a48e081f7e41339a8463751408a1a5 [2019-11-25 08:48:09,207 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:48:09,209 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-25 08:48:09,210 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:09,210 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:48:09,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:48:09,218 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,221 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f624df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09, skipping insertion in model container [2019-11-25 08:48:09,221 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:48:09,244 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:48:09,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:09,424 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:48:09,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:48:09,511 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:48:09,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09 WrapperNode [2019-11-25 08:48:09,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:48:09,512 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-25 08:48:09,512 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-25 08:48:09,512 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-25 08:48:09,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,526 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,540 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-25 08:48:09,540 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:48:09,540 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:48:09,540 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:48:09,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,549 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... [2019-11-25 08:48:09,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:48:09,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:48:09,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:48:09,555 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:48:09,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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 [2019-11-25 08:48:09,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:48:09,603 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:48:09,722 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:48:09,722 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-11-25 08:48:09,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:09 BoogieIcfgContainer [2019-11-25 08:48:09,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:48:09,724 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-25 08:48:09,724 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-25 08:48:09,727 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-25 08:48:09,727 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:48:09,728 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 08:48:09" (1/3) ... [2019-11-25 08:48:09,728 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2d0f9b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:48:09, skipping insertion in model container [2019-11-25 08:48:09,729 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:48:09,729 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:48:09" (2/3) ... [2019-11-25 08:48:09,729 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2d0f9b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 08:48:09, skipping insertion in model container [2019-11-25 08:48:09,730 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-25 08:48:09,730 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:09" (3/3) ... [2019-11-25 08:48:09,731 INFO L371 chiAutomizerObserver]: Analyzing ICFG Urban-WST2013-Fig2.c [2019-11-25 08:48:09,769 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-25 08:48:09,770 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-25 08:48:09,770 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-25 08:48:09,770 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:48:09,770 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:48:09,770 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-25 08:48:09,770 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:48:09,770 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-25 08:48:09,782 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-25 08:48:09,799 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:48:09,799 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:09,800 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:09,805 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:09,805 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:48:09,805 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-25 08:48:09,805 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states. [2019-11-25 08:48:09,806 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 3 [2019-11-25 08:48:09,806 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:09,807 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:09,807 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:09,807 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-25 08:48:09,812 INFO L794 eck$LassoCheckResult]: Stem: 4#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 6#L19-2true [2019-11-25 08:48:09,812 INFO L796 eck$LassoCheckResult]: Loop: 6#L19-2true assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 9#L21-2true assume !(main_~x2~0 > 1); 8#L21-3true main_~x1~0 := 1 + main_~x1~0; 6#L19-2true [2019-11-25 08:48:09,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:09,816 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 1 times [2019-11-25 08:48:09,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:09,822 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639468153] [2019-11-25 08:48:09,822 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:09,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:09,891 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:09,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:09,892 INFO L82 PathProgramCache]: Analyzing trace with hash 39951, now seen corresponding path program 1 times [2019-11-25 08:48:09,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:09,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612672031] [2019-11-25 08:48:09,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:09,951 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612672031] [2019-11-25 08:48:09,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:48:09,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-25 08:48:09,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862040668] [2019-11-25 08:48:09,961 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:09,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:09,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:48:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:48:09,977 INFO L87 Difference]: Start difference. First operand 8 states. Second operand 3 states. [2019-11-25 08:48:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,008 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-11-25 08:48:10,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:48:10,010 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2019-11-25 08:48:10,011 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-25 08:48:10,014 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 5 states and 6 transitions. [2019-11-25 08:48:10,015 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 5 [2019-11-25 08:48:10,015 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 5 [2019-11-25 08:48:10,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 6 transitions. [2019-11-25 08:48:10,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,016 INFO L688 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-11-25 08:48:10,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states and 6 transitions. [2019-11-25 08:48:10,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2019-11-25 08:48:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-25 08:48:10,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 6 transitions. [2019-11-25 08:48:10,039 INFO L711 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-11-25 08:48:10,039 INFO L591 BuchiCegarLoop]: Abstraction has 5 states and 6 transitions. [2019-11-25 08:48:10,039 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-25 08:48:10,039 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 5 states and 6 transitions. [2019-11-25 08:48:10,041 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2019-11-25 08:48:10,041 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,041 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,042 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,042 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1, 1] [2019-11-25 08:48:10,042 INFO L794 eck$LassoCheckResult]: Stem: 26#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 27#L19-2 [2019-11-25 08:48:10,043 INFO L796 eck$LassoCheckResult]: Loop: 27#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 28#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 30#L21-2 assume !(main_~x2~0 > 1); 29#L21-3 main_~x1~0 := 1 + main_~x1~0; 27#L19-2 [2019-11-25 08:48:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,043 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 2 times [2019-11-25 08:48:10,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,044 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174915891] [2019-11-25 08:48:10,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,050 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1240240, now seen corresponding path program 1 times [2019-11-25 08:48:10,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,051 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425999952] [2019-11-25 08:48:10,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425999952] [2019-11-25 08:48:10,082 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367563539] [2019-11-25 08:48:10,082 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:48:10,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:10,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2019-11-25 08:48:10,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485550246] [2019-11-25 08:48:10,133 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:10,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:10,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:48:10,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:48:10,134 INFO L87 Difference]: Start difference. First operand 5 states and 6 transitions. cyclomatic complexity: 2 Second operand 4 states. [2019-11-25 08:48:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,164 INFO L93 Difference]: Finished difference Result 6 states and 7 transitions. [2019-11-25 08:48:10,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-25 08:48:10,165 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 6 states and 7 transitions. [2019-11-25 08:48:10,166 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:48:10,166 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 6 states to 6 states and 7 transitions. [2019-11-25 08:48:10,166 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 6 [2019-11-25 08:48:10,167 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 6 [2019-11-25 08:48:10,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 7 transitions. [2019-11-25 08:48:10,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,167 INFO L688 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-25 08:48:10,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states and 7 transitions. [2019-11-25 08:48:10,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2019-11-25 08:48:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2019-11-25 08:48:10,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 7 transitions. [2019-11-25 08:48:10,168 INFO L711 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-25 08:48:10,168 INFO L591 BuchiCegarLoop]: Abstraction has 6 states and 7 transitions. [2019-11-25 08:48:10,168 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-25 08:48:10,168 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 6 states and 7 transitions. [2019-11-25 08:48:10,169 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-25 08:48:10,169 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,169 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,169 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,169 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [2, 1, 1, 1] [2019-11-25 08:48:10,169 INFO L794 eck$LassoCheckResult]: Stem: 53#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 54#L19-2 [2019-11-25 08:48:10,169 INFO L796 eck$LassoCheckResult]: Loop: 54#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 55#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 57#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 58#L21-2 assume !(main_~x2~0 > 1); 56#L21-3 main_~x1~0 := 1 + main_~x1~0; 54#L19-2 [2019-11-25 08:48:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 3 times [2019-11-25 08:48:10,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,170 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438835532] [2019-11-25 08:48:10,170 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,175 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash 38449199, now seen corresponding path program 2 times [2019-11-25 08:48:10,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516794314] [2019-11-25 08:48:10,176 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,209 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516794314] [2019-11-25 08:48:10,210 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875888854] [2019-11-25 08:48:10,210 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:10,253 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:48:10,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:10,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 14 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:48:10,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:10,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2019-11-25 08:48:10,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467130374] [2019-11-25 08:48:10,260 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:10,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:10,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-25 08:48:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-25 08:48:10,261 INFO L87 Difference]: Start difference. First operand 6 states and 7 transitions. cyclomatic complexity: 2 Second operand 5 states. [2019-11-25 08:48:10,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,287 INFO L93 Difference]: Finished difference Result 7 states and 8 transitions. [2019-11-25 08:48:10,288 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:48:10,288 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 7 states and 8 transitions. [2019-11-25 08:48:10,289 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-25 08:48:10,289 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 7 states to 7 states and 8 transitions. [2019-11-25 08:48:10,289 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 7 [2019-11-25 08:48:10,289 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 7 [2019-11-25 08:48:10,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 8 transitions. [2019-11-25 08:48:10,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,290 INFO L688 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-25 08:48:10,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states and 8 transitions. [2019-11-25 08:48:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-25 08:48:10,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-25 08:48:10,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2019-11-25 08:48:10,291 INFO L711 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-25 08:48:10,291 INFO L591 BuchiCegarLoop]: Abstraction has 7 states and 8 transitions. [2019-11-25 08:48:10,291 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-25 08:48:10,292 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 7 states and 8 transitions. [2019-11-25 08:48:10,292 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 6 [2019-11-25 08:48:10,292 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,292 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,292 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,293 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [3, 1, 1, 1] [2019-11-25 08:48:10,293 INFO L794 eck$LassoCheckResult]: Stem: 86#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 87#L19-2 [2019-11-25 08:48:10,293 INFO L796 eck$LassoCheckResult]: Loop: 87#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 88#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 90#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 92#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 91#L21-2 assume !(main_~x2~0 > 1); 89#L21-3 main_~x1~0 := 1 + main_~x1~0; 87#L19-2 [2019-11-25 08:48:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,293 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 4 times [2019-11-25 08:48:10,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,294 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787839430] [2019-11-25 08:48:10,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,299 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1191926928, now seen corresponding path program 3 times [2019-11-25 08:48:10,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,299 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002990378] [2019-11-25 08:48:10,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002990378] [2019-11-25 08:48:10,339 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236835412] [2019-11-25 08:48:10,339 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:10,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-25 08:48:10,373 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:10,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 17 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:48:10,374 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:10,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2019-11-25 08:48:10,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31874677] [2019-11-25 08:48:10,381 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:10,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:10,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:48:10,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:48:10,381 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. cyclomatic complexity: 2 Second operand 6 states. [2019-11-25 08:48:10,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,397 INFO L93 Difference]: Finished difference Result 8 states and 9 transitions. [2019-11-25 08:48:10,397 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:48:10,398 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 8 states and 9 transitions. [2019-11-25 08:48:10,398 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-25 08:48:10,399 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 8 states to 8 states and 9 transitions. [2019-11-25 08:48:10,399 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 8 [2019-11-25 08:48:10,399 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 8 [2019-11-25 08:48:10,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 9 transitions. [2019-11-25 08:48:10,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,399 INFO L688 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-25 08:48:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states and 9 transitions. [2019-11-25 08:48:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-25 08:48:10,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-25 08:48:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2019-11-25 08:48:10,401 INFO L711 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-25 08:48:10,401 INFO L591 BuchiCegarLoop]: Abstraction has 8 states and 9 transitions. [2019-11-25 08:48:10,401 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-11-25 08:48:10,401 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 8 states and 9 transitions. [2019-11-25 08:48:10,401 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 7 [2019-11-25 08:48:10,402 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,402 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,402 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,402 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [4, 1, 1, 1] [2019-11-25 08:48:10,402 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 126#L19-2 [2019-11-25 08:48:10,402 INFO L796 eck$LassoCheckResult]: Loop: 126#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 127#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 129#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 132#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 131#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 130#L21-2 assume !(main_~x2~0 > 1); 128#L21-3 main_~x1~0 := 1 + main_~x1~0; 126#L19-2 [2019-11-25 08:48:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,403 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 5 times [2019-11-25 08:48:10,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,403 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510878997] [2019-11-25 08:48:10,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,408 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1704969137, now seen corresponding path program 4 times [2019-11-25 08:48:10,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,409 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074979027] [2019-11-25 08:48:10,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,480 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074979027] [2019-11-25 08:48:10,481 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405376387] [2019-11-25 08:48:10,481 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:10,519 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-25 08:48:10,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:10,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-25 08:48:10,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:10,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:10,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2019-11-25 08:48:10,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963993458] [2019-11-25 08:48:10,527 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:10,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:10,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:48:10,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:48:10,527 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. cyclomatic complexity: 2 Second operand 7 states. [2019-11-25 08:48:10,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,546 INFO L93 Difference]: Finished difference Result 9 states and 10 transitions. [2019-11-25 08:48:10,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-25 08:48:10,546 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 9 states and 10 transitions. [2019-11-25 08:48:10,547 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-25 08:48:10,547 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 9 states to 9 states and 10 transitions. [2019-11-25 08:48:10,548 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 9 [2019-11-25 08:48:10,548 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 9 [2019-11-25 08:48:10,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 10 transitions. [2019-11-25 08:48:10,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,548 INFO L688 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-25 08:48:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states and 10 transitions. [2019-11-25 08:48:10,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-25 08:48:10,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-25 08:48:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-25 08:48:10,550 INFO L711 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-25 08:48:10,550 INFO L591 BuchiCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-25 08:48:10,550 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-11-25 08:48:10,550 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 9 states and 10 transitions. [2019-11-25 08:48:10,550 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 8 [2019-11-25 08:48:10,550 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,551 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,551 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,551 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [5, 1, 1, 1] [2019-11-25 08:48:10,551 INFO L794 eck$LassoCheckResult]: Stem: 170#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 171#L19-2 [2019-11-25 08:48:10,551 INFO L796 eck$LassoCheckResult]: Loop: 171#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 172#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 174#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 178#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 177#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 176#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 175#L21-2 assume !(main_~x2~0 > 1); 173#L21-3 main_~x1~0 := 1 + main_~x1~0; 171#L19-2 [2019-11-25 08:48:10,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 6 times [2019-11-25 08:48:10,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,552 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431604966] [2019-11-25 08:48:10,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,556 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1314433936, now seen corresponding path program 5 times [2019-11-25 08:48:10,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,557 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961953741] [2019-11-25 08:48:10,557 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961953741] [2019-11-25 08:48:10,650 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451923042] [2019-11-25 08:48:10,650 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:10,689 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-25 08:48:10,689 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:10,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:48:10,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:10,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:10,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-11-25 08:48:10,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288686445] [2019-11-25 08:48:10,696 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:10,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:10,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-25 08:48:10,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:48:10,697 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. cyclomatic complexity: 2 Second operand 8 states. [2019-11-25 08:48:10,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,726 INFO L93 Difference]: Finished difference Result 10 states and 11 transitions. [2019-11-25 08:48:10,727 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:48:10,728 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 10 states and 11 transitions. [2019-11-25 08:48:10,728 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-25 08:48:10,729 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 10 states to 10 states and 11 transitions. [2019-11-25 08:48:10,729 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 10 [2019-11-25 08:48:10,729 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 10 [2019-11-25 08:48:10,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 11 transitions. [2019-11-25 08:48:10,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,729 INFO L688 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-25 08:48:10,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states and 11 transitions. [2019-11-25 08:48:10,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-25 08:48:10,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-25 08:48:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2019-11-25 08:48:10,731 INFO L711 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-25 08:48:10,731 INFO L591 BuchiCegarLoop]: Abstraction has 10 states and 11 transitions. [2019-11-25 08:48:10,731 INFO L424 BuchiCegarLoop]: ======== Iteration 7============ [2019-11-25 08:48:10,731 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 10 states and 11 transitions. [2019-11-25 08:48:10,732 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2019-11-25 08:48:10,732 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,732 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,732 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,732 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [6, 1, 1, 1] [2019-11-25 08:48:10,732 INFO L794 eck$LassoCheckResult]: Stem: 221#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 222#L19-2 [2019-11-25 08:48:10,733 INFO L796 eck$LassoCheckResult]: Loop: 222#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 223#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 225#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 230#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 229#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 228#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 227#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 226#L21-2 assume !(main_~x2~0 > 1); 224#L21-3 main_~x1~0 := 1 + main_~x1~0; 222#L19-2 [2019-11-25 08:48:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 7 times [2019-11-25 08:48:10,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,733 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692212986] [2019-11-25 08:48:10,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,737 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -2092744593, now seen corresponding path program 6 times [2019-11-25 08:48:10,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,738 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690151159] [2019-11-25 08:48:10,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690151159] [2019-11-25 08:48:10,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260917003] [2019-11-25 08:48:10,864 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:10,895 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-25 08:48:10,895 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:10,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-25 08:48:10,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:10,905 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:10,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:10,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2019-11-25 08:48:10,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862468398] [2019-11-25 08:48:10,906 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:48:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:48:10,907 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. cyclomatic complexity: 2 Second operand 9 states. [2019-11-25 08:48:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:10,938 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2019-11-25 08:48:10,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-25 08:48:10,939 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 11 states and 12 transitions. [2019-11-25 08:48:10,939 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2019-11-25 08:48:10,940 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 11 states to 11 states and 12 transitions. [2019-11-25 08:48:10,940 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-11-25 08:48:10,940 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 11 [2019-11-25 08:48:10,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 12 transitions. [2019-11-25 08:48:10,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:10,941 INFO L688 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-25 08:48:10,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states and 12 transitions. [2019-11-25 08:48:10,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-25 08:48:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-25 08:48:10,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2019-11-25 08:48:10,942 INFO L711 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-25 08:48:10,942 INFO L591 BuchiCegarLoop]: Abstraction has 11 states and 12 transitions. [2019-11-25 08:48:10,942 INFO L424 BuchiCegarLoop]: ======== Iteration 8============ [2019-11-25 08:48:10,942 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 11 states and 12 transitions. [2019-11-25 08:48:10,943 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 10 [2019-11-25 08:48:10,943 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:10,943 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:10,943 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:10,943 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [7, 1, 1, 1] [2019-11-25 08:48:10,944 INFO L794 eck$LassoCheckResult]: Stem: 278#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 279#L19-2 [2019-11-25 08:48:10,944 INFO L796 eck$LassoCheckResult]: Loop: 279#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 280#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 282#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 288#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 287#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 286#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 285#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 284#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 283#L21-2 assume !(main_~x2~0 > 1); 281#L21-3 main_~x1~0 := 1 + main_~x1~0; 279#L19-2 [2019-11-25 08:48:10,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,944 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 8 times [2019-11-25 08:48:10,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,944 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356076826] [2019-11-25 08:48:10,945 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:10,948 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:10,949 INFO L82 PathProgramCache]: Analyzing trace with hash -450571184, now seen corresponding path program 7 times [2019-11-25 08:48:10,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:10,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869963436] [2019-11-25 08:48:10,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:11,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869963436] [2019-11-25 08:48:11,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821837865] [2019-11-25 08:48:11,068 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:11,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:11,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-25 08:48:11,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:11,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:11,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2019-11-25 08:48:11,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653160343] [2019-11-25 08:48:11,111 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:11,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:11,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:48:11,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:48:11,111 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. cyclomatic complexity: 2 Second operand 10 states. [2019-11-25 08:48:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:11,135 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2019-11-25 08:48:11,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-25 08:48:11,136 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 12 states and 13 transitions. [2019-11-25 08:48:11,136 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2019-11-25 08:48:11,137 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 12 states to 12 states and 13 transitions. [2019-11-25 08:48:11,137 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 12 [2019-11-25 08:48:11,137 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-11-25 08:48:11,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 13 transitions. [2019-11-25 08:48:11,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:11,137 INFO L688 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-25 08:48:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states and 13 transitions. [2019-11-25 08:48:11,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-25 08:48:11,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-25 08:48:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2019-11-25 08:48:11,139 INFO L711 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-25 08:48:11,139 INFO L591 BuchiCegarLoop]: Abstraction has 12 states and 13 transitions. [2019-11-25 08:48:11,139 INFO L424 BuchiCegarLoop]: ======== Iteration 9============ [2019-11-25 08:48:11,139 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 12 states and 13 transitions. [2019-11-25 08:48:11,140 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 11 [2019-11-25 08:48:11,140 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:11,140 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:11,140 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:11,140 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [8, 1, 1, 1] [2019-11-25 08:48:11,140 INFO L794 eck$LassoCheckResult]: Stem: 341#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 342#L19-2 [2019-11-25 08:48:11,140 INFO L796 eck$LassoCheckResult]: Loop: 342#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 343#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 345#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 352#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 351#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 350#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 349#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 348#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 347#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 346#L21-2 assume !(main_~x2~0 > 1); 344#L21-3 main_~x1~0 := 1 + main_~x1~0; 342#L19-2 [2019-11-25 08:48:11,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:11,141 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 9 times [2019-11-25 08:48:11,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:11,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408873830] [2019-11-25 08:48:11,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:11,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,145 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:11,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:11,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1082803057, now seen corresponding path program 8 times [2019-11-25 08:48:11,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:11,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044763674] [2019-11-25 08:48:11,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:11,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:11,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044763674] [2019-11-25 08:48:11,295 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261833720] [2019-11-25 08:48:11,296 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-25 08:48:11,325 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-25 08:48:11,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:48:11,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-25 08:48:11,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:11,342 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:11,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:48:11,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-11-25 08:48:11,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238151658] [2019-11-25 08:48:11,349 INFO L811 eck$LassoCheckResult]: loop already infeasible [2019-11-25 08:48:11,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-25 08:48:11,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-25 08:48:11,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:48:11,352 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. cyclomatic complexity: 2 Second operand 11 states. [2019-11-25 08:48:11,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:48:11,389 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2019-11-25 08:48:11,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-25 08:48:11,395 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 13 states and 14 transitions. [2019-11-25 08:48:11,395 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2019-11-25 08:48:11,396 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 13 states to 13 states and 14 transitions. [2019-11-25 08:48:11,396 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2019-11-25 08:48:11,396 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 13 [2019-11-25 08:48:11,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 14 transitions. [2019-11-25 08:48:11,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:11,396 INFO L688 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-25 08:48:11,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states and 14 transitions. [2019-11-25 08:48:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-25 08:48:11,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-25 08:48:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-11-25 08:48:11,398 INFO L711 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-25 08:48:11,398 INFO L591 BuchiCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-11-25 08:48:11,398 INFO L424 BuchiCegarLoop]: ======== Iteration 10============ [2019-11-25 08:48:11,399 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 13 states and 14 transitions. [2019-11-25 08:48:11,402 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 12 [2019-11-25 08:48:11,402 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:11,402 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:11,402 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1] [2019-11-25 08:48:11,402 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [9, 1, 1, 1] [2019-11-25 08:48:11,403 INFO L794 eck$LassoCheckResult]: Stem: 410#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 411#L19-2 [2019-11-25 08:48:11,403 INFO L796 eck$LassoCheckResult]: Loop: 411#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 412#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 414#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 422#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 421#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 420#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 419#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 418#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 417#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 416#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 415#L21-2 assume !(main_~x2~0 > 1); 413#L21-3 main_~x1~0 := 1 + main_~x1~0; 411#L19-2 [2019-11-25 08:48:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash 32, now seen corresponding path program 10 times [2019-11-25 08:48:11,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:11,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600279303] [2019-11-25 08:48:11,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,407 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:11,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:11,408 INFO L82 PathProgramCache]: Analyzing trace with hash 792845360, now seen corresponding path program 9 times [2019-11-25 08:48:11,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:11,408 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043742794] [2019-11-25 08:48:11,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,434 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:11,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:11,435 INFO L82 PathProgramCache]: Analyzing trace with hash 287286735, now seen corresponding path program 1 times [2019-11-25 08:48:11,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:11,436 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601530149] [2019-11-25 08:48:11,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:11,466 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:11,573 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 39 [2019-11-25 08:48:11,595 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:11,596 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:11,596 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:11,596 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:11,596 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:48:11,597 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,597 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:11,597 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:11,597 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2019-11-25 08:48:11,597 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:11,597 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:11,609 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,614 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,623 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,631 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,704 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:11,705 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) [2019-11-25 08:48:11,716 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:11,716 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,725 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:11,725 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_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) [2019-11-25 08:48:11,770 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:11,771 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,778 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:11,778 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_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) [2019-11-25 08:48:11,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:11,793 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) [2019-11-25 08:48:11,811 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:48:11,811 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,839 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:48:11,841 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:11,841 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:11,841 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:11,841 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:11,842 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:48:11,842 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,842 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:11,842 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:11,842 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration10_Loop [2019-11-25 08:48:11,842 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:11,842 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:11,844 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,867 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,872 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,879 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:11,947 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:11,951 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,955 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 [2019-11-25 08:48:11,957 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:11,957 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:11,957 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:11,957 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:11,961 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:48:11,961 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-25 08:48:11,965 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:11,983 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 [2019-11-25 08:48:11,985 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:11,985 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:11,985 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:11,985 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:11,988 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:48:11,988 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-25 08:48:11,994 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,003 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 [2019-11-25 08:48:12,004 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:12,004 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:48:12,005 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:12,005 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:12,005 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,014 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:48:12,014 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:48:12,018 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:48:12,022 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:48:12,022 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,042 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:48:12,043 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:48:12,043 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:48:12,043 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x1~0) = -2*ULTIMATE.start_main_~x1~0 + 21 Supporting invariants [] [2019-11-25 08:48:12,049 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:48:12,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 6 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,076 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,085 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,085 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,099 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-11-25 08:48:12,102 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 [2019-11-25 08:48:12,103 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2 Second operand 3 states. [2019-11-25 08:48:12,128 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 13 states and 14 transitions. cyclomatic complexity: 2. Second operand 3 states. Result 25 states and 28 transitions. Complement of second has 4 states. [2019-11-25 08:48:12,129 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 [2019-11-25 08:48:12,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-11-25 08:48:12,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-25 08:48:12,131 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 12 letters. [2019-11-25 08:48:12,131 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,132 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 13 letters. Loop has 12 letters. [2019-11-25 08:48:12,132 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,132 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 1 letters. Loop has 24 letters. [2019-11-25 08:48:12,132 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,133 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 25 states and 28 transitions. [2019-11-25 08:48:12,133 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-25 08:48:12,134 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 25 states to 24 states and 27 transitions. [2019-11-25 08:48:12,134 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 11 [2019-11-25 08:48:12,134 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 12 [2019-11-25 08:48:12,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 27 transitions. [2019-11-25 08:48:12,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:48:12,135 INFO L688 BuchiCegarLoop]: Abstraction has 24 states and 27 transitions. [2019-11-25 08:48:12,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states and 27 transitions. [2019-11-25 08:48:12,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 15. [2019-11-25 08:48:12,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-25 08:48:12,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-25 08:48:12,136 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-25 08:48:12,137 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-25 08:48:12,137 INFO L424 BuchiCegarLoop]: ======== Iteration 11============ [2019-11-25 08:48:12,137 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 18 transitions. [2019-11-25 08:48:12,137 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-25 08:48:12,137 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:12,137 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:12,138 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-25 08:48:12,138 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-25 08:48:12,141 INFO L794 eck$LassoCheckResult]: Stem: 507#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 508#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 510#L21-2 [2019-11-25 08:48:12,141 INFO L796 eck$LassoCheckResult]: Loop: 510#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 510#L21-2 [2019-11-25 08:48:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1002, now seen corresponding path program 1 times [2019-11-25 08:48:12,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:12,141 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090802570] [2019-11-25 08:48:12,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,145 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:12,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,146 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 1 times [2019-11-25 08:48:12,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:12,146 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544608762] [2019-11-25 08:48:12,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,149 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash 31081, now seen corresponding path program 1 times [2019-11-25 08:48:12,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:12,150 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056524610] [2019-11-25 08:48:12,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,155 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:12,164 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:12,164 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:12,164 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:12,164 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:12,164 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:48:12,164 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,164 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:12,164 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:12,164 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2019-11-25 08:48:12,164 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:12,164 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:12,165 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,167 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,217 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:12,218 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,223 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:12,223 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:48:12,226 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:12,226 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_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,231 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:12,231 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:48:12,234 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:12,234 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_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,242 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:12,242 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,259 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:48:12,259 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-25 08:48:12,264 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:48:12,266 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:12,266 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:12,266 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:12,266 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:12,266 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:48:12,266 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,266 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:12,267 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:12,267 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration11_Loop [2019-11-25 08:48:12,267 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:12,267 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:12,267 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,275 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,278 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,316 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:12,317 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,328 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 [2019-11-25 08:48:12,329 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:12,330 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:12,330 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:12,330 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:12,336 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:48:12,336 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. [2019-11-25 08:48:12,340 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,354 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 [2019-11-25 08:48:12,356 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:12,356 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:12,357 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:12,357 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:12,366 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:48:12,366 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,371 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,399 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 [2019-11-25 08:48:12,400 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:12,400 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:48:12,401 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:12,401 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:12,401 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:12,402 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:48:12,402 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-25 08:48:12,404 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:48:12,406 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:48:12,407 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/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) [2019-11-25 08:48:12,418 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:48:12,419 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:48:12,419 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:48:12,419 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,422 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:48:12,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,442 INFO L255 TraceCheckSpWp]: Trace formula consists of 9 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,447 WARN L253 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:12,447 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 [2019-11-25 08:48:12,447 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5 Second operand 2 states. [2019-11-25 08:48:12,455 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 18 transitions. cyclomatic complexity: 5. Second operand 2 states. Result 31 states and 36 transitions. Complement of second has 5 states. [2019-11-25 08:48:12,456 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 [2019-11-25 08:48:12,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-25 08:48:12,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-25 08:48:12,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 1 letters. [2019-11-25 08:48:12,456 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 3 letters. Loop has 1 letters. [2019-11-25 08:48:12,456 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,456 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 2 letters. Loop has 2 letters. [2019-11-25 08:48:12,457 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,457 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 31 states and 36 transitions. [2019-11-25 08:48:12,458 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-25 08:48:12,458 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 31 states to 27 states and 31 transitions. [2019-11-25 08:48:12,458 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 3 [2019-11-25 08:48:12,458 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 3 [2019-11-25 08:48:12,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 31 transitions. [2019-11-25 08:48:12,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-25 08:48:12,459 INFO L688 BuchiCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-25 08:48:12,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states and 31 transitions. [2019-11-25 08:48:12,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 15. [2019-11-25 08:48:12,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-25 08:48:12,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2019-11-25 08:48:12,460 INFO L711 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-25 08:48:12,460 INFO L591 BuchiCegarLoop]: Abstraction has 15 states and 17 transitions. [2019-11-25 08:48:12,461 INFO L424 BuchiCegarLoop]: ======== Iteration 12============ [2019-11-25 08:48:12,461 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 15 states and 17 transitions. [2019-11-25 08:48:12,461 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-11-25 08:48:12,461 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-25 08:48:12,461 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-25 08:48:12,462 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [9, 2, 1, 1, 1] [2019-11-25 08:48:12,462 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-11-25 08:48:12,462 INFO L794 eck$LassoCheckResult]: Stem: 582#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet0, main_#t~nondet1, main_~x1~0, main_~x2~0;havoc main_~x1~0;havoc main_~x2~0;main_~x1~0 := main_#t~nondet0;havoc main_#t~nondet0;main_~x2~0 := main_#t~nondet1;havoc main_#t~nondet1; 583#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 584#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 588#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 596#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 595#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 594#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 593#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 592#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 591#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 590#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 589#L21-2 assume !(main_~x2~0 > 1); 587#L21-3 main_~x1~0 := 1 + main_~x1~0; 585#L19-2 assume !!(main_~x1~0 <= 10);main_~x2~0 := 10; 586#L21-2 [2019-11-25 08:48:12,462 INFO L796 eck$LassoCheckResult]: Loop: 586#L21-2 assume !!(main_~x2~0 > 1);main_~x2~0 := main_~x2~0 - 1; 586#L21-2 [2019-11-25 08:48:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,462 INFO L82 PathProgramCache]: Analyzing trace with hash 315954203, now seen corresponding path program 2 times [2019-11-25 08:48:12,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:12,463 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775248040] [2019-11-25 08:48:12,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,476 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,476 INFO L82 PathProgramCache]: Analyzing trace with hash 50, now seen corresponding path program 2 times [2019-11-25 08:48:12,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:12,476 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536358794] [2019-11-25 08:48:12,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,479 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:12,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1204645720, now seen corresponding path program 3 times [2019-11-25 08:48:12,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-25 08:48:12,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062471025] [2019-11-25 08:48:12,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-25 08:48:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-25 08:48:12,493 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-25 08:48:12,506 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:12,506 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:12,506 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:12,506 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:12,506 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-25 08:48:12,507 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,507 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:12,507 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:12,507 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2019-11-25 08:48:12,507 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:12,507 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:12,508 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,528 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,578 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:12,578 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,584 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:12,584 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,588 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-25 08:48:12,589 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_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,595 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-25 08:48:12,595 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,607 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-25 08:48:12,608 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,617 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-25 08:48:12,619 INFO L210 LassoAnalysis]: Preferences: [2019-11-25 08:48:12,619 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-25 08:48:12,619 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-25 08:48:12,619 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-25 08:48:12,619 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-25 08:48:12,619 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,619 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-25 08:48:12,620 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-25 08:48:12,620 INFO L133 ssoRankerPreferences]: Filename of dumped script: Urban-WST2013-Fig2.c_Iteration12_Loop [2019-11-25 08:48:12,620 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-25 08:48:12,620 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-25 08:48:12,621 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,625 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,632 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-25 08:48:12,679 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-25 08:48:12,679 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,686 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 [2019-11-25 08:48:12,687 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:12,688 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:12,688 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:12,688 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:12,691 INFO L401 nArgumentSynthesizer]: We have 6 Motzkin's Theorem applications. [2019-11-25 08:48:12,691 INFO L402 nArgumentSynthesizer]: A total of 2 supporting invariants were added. Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,695 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,703 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 [2019-11-25 08:48:12,704 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-25 08:48:12,705 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-25 08:48:12,705 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-25 08:48:12,705 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-25 08:48:12,705 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-25 08:48:12,706 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-25 08:48:12,706 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,709 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-25 08:48:12,711 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-25 08:48:12,711 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_bfe3c99d-30db-4d72-9a3c-60f625609ace/bin/uautomizer/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-25 08:48:12,719 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-25 08:48:12,719 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-25 08:48:12,719 INFO L510 LassoAnalysis]: Proved termination. [2019-11-25 08:48:12,719 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(ULTIMATE.start_main_~x2~0) = 1*ULTIMATE.start_main_~x2~0 Supporting invariants [] Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-25 08:48:12,722 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-25 08:48:12,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,749 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,753 WARN L253 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:12,753 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 [2019-11-25 08:48:12,753 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-11-25 08:48:12,762 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2019-11-25 08:48:12,764 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 [2019-11-25 08:48:12,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-25 08:48:12,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-25 08:48:12,765 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2019-11-25 08:48:12,765 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,765 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:48:12,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,790 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,791 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,795 WARN L253 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,795 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:12,796 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.1 stem predicates 1 loop predicates [2019-11-25 08:48:12,796 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-11-25 08:48:12,802 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 29 states and 33 transitions. Complement of second has 5 states. [2019-11-25 08:48:12,804 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 [2019-11-25 08:48:12,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-25 08:48:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 5 transitions. [2019-11-25 08:48:12,804 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 5 transitions. Stem has 14 letters. Loop has 1 letters. [2019-11-25 08:48:12,804 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,804 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-25 08:48:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:48:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,826 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:48:12,831 WARN L253 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:48:12,831 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:48:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:48:12,831 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 1 loop predicates [2019-11-25 08:48:12,831 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4 Second operand 2 states. [2019-11-25 08:48:12,841 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 15 states and 17 transitions. cyclomatic complexity: 4. Second operand 2 states. Result 18 states and 20 transitions. Complement of second has 4 states. [2019-11-25 08:48:12,841 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 [2019-11-25 08:48:12,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2019-11-25 08:48:12,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 9 transitions. [2019-11-25 08:48:12,842 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 1 letters. [2019-11-25 08:48:12,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 15 letters. Loop has 1 letters. [2019-11-25 08:48:12,843 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,843 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 3 states and 9 transitions. Stem has 14 letters. Loop has 2 letters. [2019-11-25 08:48:12,844 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-25 08:48:12,844 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 18 states and 20 transitions. [2019-11-25 08:48:12,844 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:48:12,845 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 18 states to 0 states and 0 transitions. [2019-11-25 08:48:12,845 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-25 08:48:12,845 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-25 08:48:12,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-25 08:48:12,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-25 08:48:12,845 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:48:12,845 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:48:12,845 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-25 08:48:12,845 INFO L424 BuchiCegarLoop]: ======== Iteration 13============ [2019-11-25 08:48:12,845 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-25 08:48:12,846 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-25 08:48:12,846 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-25 08:48:12,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 08:48:12 BoogieIcfgContainer [2019-11-25 08:48:12,856 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-25 08:48:12,857 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-25 08:48:12,857 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-25 08:48:12,857 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-25 08:48:12,857 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:48:09" (3/4) ... [2019-11-25 08:48:12,860 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-25 08:48:12,860 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-25 08:48:12,862 INFO L168 Benchmark]: Toolchain (without parser) took 3653.02 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.8 MB in the beginning and 1.0 GB in the end (delta: -77.0 MB). Peak memory consumption was 66.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:12,862 INFO L168 Benchmark]: CDTParser took 0.21 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. [2019-11-25 08:48:12,865 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:12,865 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.95 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. [2019-11-25 08:48:12,867 INFO L168 Benchmark]: Boogie Preprocessor took 13.98 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. [2019-11-25 08:48:12,868 INFO L168 Benchmark]: RCFGBuilder took 169.35 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:12,868 INFO L168 Benchmark]: BuchiAutomizer took 3131.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 99.1 MB). Peak memory consumption was 99.1 MB. Max. memory is 11.5 GB. [2019-11-25 08:48:12,868 INFO L168 Benchmark]: Witness Printer took 3.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 24 B). Peak memory consumption was 24 B. Max. memory is 11.5 GB. [2019-11-25 08:48:12,870 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 302.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 143.1 MB). Free memory was 944.8 MB in the beginning and 1.1 GB in the end (delta: -193.1 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.95 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 13.98 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 169.35 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: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3131.96 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 99.1 MB). Peak memory consumption was 99.1 MB. Max. memory is 11.5 GB. * Witness Printer took 3.80 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 24 B). Peak memory consumption was 24 B. 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 12 terminating modules (9 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function -2 * x1 + 21 and consists of 3 locations. One deterministic module has affine ranking function x2 and consists of 3 locations. One nondeterministic module has affine ranking function x2 and consists of 3 locations. 9 modules have a trivial ranking function, the largest among these consists of 11 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.0s and 13 iterations. TraceHistogramMax:9. Analysis of lassos took 2.4s. Construction of modules took 0.1s. Büchi inclusion checks took 0.3s. Highest rank in rank-based complementation 3. Minimization of det autom 10. Minimization of nondet autom 2. Automata minimization 0.0s AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 15 states and ocurred in iteration 10. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 45/45 HoareTripleCheckerStatistics: 62 SDtfs, 21 SDslu, 50 SDs, 0 SdLazy, 157 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI9 SFLT3 conc0 concLT0 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital12 mio100 ax203 hnf98 lsp42 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq160 hnf93 smp100 dnf100 smp100 tf113 neg100 sie107 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 13ms VariablesStem: 1 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 2 MotzkinApplications: 6 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 5 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.1s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...