./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/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 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 07:14:07,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 07:14:07,151 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 07:14:07,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 07:14:07,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 07:14:07,171 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 07:14:07,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 07:14:07,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 07:14:07,189 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 07:14:07,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 07:14:07,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 07:14:07,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 07:14:07,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 07:14:07,196 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 07:14:07,197 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 07:14:07,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 07:14:07,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 07:14:07,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 07:14:07,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 07:14:07,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 07:14:07,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 07:14:07,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 07:14:07,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 07:14:07,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 07:14:07,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 07:14:07,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 07:14:07,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 07:14:07,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 07:14:07,226 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 07:14:07,227 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 07:14:07,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 07:14:07,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 07:14:07,229 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 07:14:07,230 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 07:14:07,231 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 07:14:07,231 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 07:14:07,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 07:14:07,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 07:14:07,232 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 07:14:07,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 07:14:07,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 07:14:07,235 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-11-20 07:14:07,266 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 07:14:07,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 07:14:07,267 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 07:14:07,268 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 07:14:07,268 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 07:14:07,268 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-11-20 07:14:07,268 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-11-20 07:14:07,268 INFO L138 SettingsManager]: * Use old map elimination=false [2019-11-20 07:14:07,269 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-11-20 07:14:07,269 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-11-20 07:14:07,269 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-11-20 07:14:07,269 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 07:14:07,269 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 07:14:07,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 07:14:07,270 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 07:14:07,270 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-11-20 07:14:07,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-11-20 07:14:07,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-11-20 07:14:07,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 07:14:07,271 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-11-20 07:14:07,271 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 07:14:07,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-11-20 07:14:07,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 07:14:07,271 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 07:14:07,272 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-11-20 07:14:07,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 07:14:07,272 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 07:14:07,272 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-11-20 07:14:07,273 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-11-20 07:14:07,273 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_d6e75eaf-c734-4682-af82-8115a1beeb5b/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 -> 1b5ce1e17bce3e34a2c882b1080bdbc1a62cb801 [2019-11-20 07:14:07,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 07:14:07,461 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 07:14:07,463 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 07:14:07,465 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 07:14:07,466 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 07:14:07,467 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2019-11-20 07:14:07,530 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/data/b22245472/06db9bac99554e5786d865494bc72fbf/FLAGdb6a56405 [2019-11-20 07:14:07,894 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 07:14:07,895 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/sv-benchmarks/c/termination-crafted/NestedRecursion_1c.c [2019-11-20 07:14:07,899 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/data/b22245472/06db9bac99554e5786d865494bc72fbf/FLAGdb6a56405 [2019-11-20 07:14:08,258 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/data/b22245472/06db9bac99554e5786d865494bc72fbf [2019-11-20 07:14:08,261 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 07:14:08,263 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 07:14:08,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 07:14:08,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 07:14:08,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 07:14:08,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,275 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d8d86a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08, skipping insertion in model container [2019-11-20 07:14:08,276 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,282 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 07:14:08,296 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 07:14:08,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:14:08,453 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 07:14:08,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 07:14:08,581 INFO L192 MainTranslator]: Completed translation [2019-11-20 07:14:08,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08 WrapperNode [2019-11-20 07:14:08,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 07:14:08,582 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 07:14:08,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 07:14:08,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 07:14:08,593 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,597 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 07:14:08,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 07:14:08,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 07:14:08,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 07:14:08,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,630 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,632 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,633 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... [2019-11-20 07:14:08,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 07:14:08,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 07:14:08,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 07:14:08,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 07:14:08,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2019-11-20 07:14:08,692 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2019-11-20 07:14:08,692 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2019-11-20 07:14:08,693 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2019-11-20 07:14:08,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 07:14:08,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 07:14:08,905 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 07:14:08,906 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 07:14:08,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:08 BoogieIcfgContainer [2019-11-20 07:14:08,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 07:14:08,908 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-11-20 07:14:08,908 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-11-20 07:14:08,912 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-11-20 07:14:08,913 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 07:14:08,928 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 20.11 07:14:08" (1/3) ... [2019-11-20 07:14:08,930 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2f070112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 07:14:08, skipping insertion in model container [2019-11-20 07:14:08,930 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 07:14:08,930 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:14:08" (2/3) ... [2019-11-20 07:14:08,931 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@2f070112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 20.11 07:14:08, skipping insertion in model container [2019-11-20 07:14:08,931 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-11-20 07:14:08,931 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:08" (3/3) ... [2019-11-20 07:14:08,933 INFO L371 chiAutomizerObserver]: Analyzing ICFG NestedRecursion_1c.c [2019-11-20 07:14:09,002 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-11-20 07:14:09,002 INFO L357 BuchiCegarLoop]: Hoare is false [2019-11-20 07:14:09,003 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-11-20 07:14:09,003 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 07:14:09,003 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 07:14:09,003 INFO L361 BuchiCegarLoop]: Difference is false [2019-11-20 07:14:09,003 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 07:14:09,004 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-11-20 07:14:09,039 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-20 07:14:09,069 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-20 07:14:09,069 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:14:09,069 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:14:09,081 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 07:14:09,082 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 07:14:09,082 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-11-20 07:14:09,082 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 21 states. [2019-11-20 07:14:09,088 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 8 [2019-11-20 07:14:09,088 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:14:09,088 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:14:09,089 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1] [2019-11-20 07:14:09,089 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 07:14:09,097 INFO L794 eck$LassoCheckResult]: Stem: 13#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 22#L25true call main_#t~ret6 := rec2(main_~x~0);< 3#rec2ENTRYtrue [2019-11-20 07:14:09,098 INFO L796 eck$LassoCheckResult]: Loop: 3#rec2ENTRYtrue ~j := #in~j; 20#L18true assume !(~j <= 0); 18#L20true call #t~ret3 := rec2(~j - 1);< 3#rec2ENTRYtrue [2019-11-20 07:14:09,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:09,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1617, now seen corresponding path program 1 times [2019-11-20 07:14:09,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:09,112 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732202308] [2019-11-20 07:14:09,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,188 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:09,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash 39867, now seen corresponding path program 1 times [2019-11-20 07:14:09,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:09,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024836794] [2019-11-20 07:14:09,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,206 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:09,207 INFO L82 PathProgramCache]: Analyzing trace with hash 48182123, now seen corresponding path program 1 times [2019-11-20 07:14:09,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:09,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610615738] [2019-11-20 07:14:09,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,230 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:09,336 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 07:14:09,337 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 07:14:09,337 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 07:14:09,337 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 07:14:09,338 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 07:14:09,338 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,338 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 07:14:09,338 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 07:14:09,339 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2019-11-20 07:14:09,339 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 07:14:09,339 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 07:14:09,357 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,363 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,366 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,369 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,380 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,442 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 07:14:09,442 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,447 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:09,448 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 07:14:09,454 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:09,455 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#res=0} Honda state: {rec2_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:09,460 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 07:14:09,463 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:09,464 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret3=0} Honda state: {rec2_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,469 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:09,469 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 07:14:09,474 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:09,474 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec2_#t~ret4=0} Honda state: {rec2_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:09,481 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:09,481 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,500 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 07:14:09,500 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 07:14:09,513 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 07:14:09,515 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 07:14:09,515 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 07:14:09,515 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 07:14:09,516 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 07:14:09,516 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 07:14:09,516 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,516 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 07:14:09,516 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 07:14:09,516 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration1_Loop [2019-11-20 07:14:09,516 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 07:14:09,517 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 07:14:09,518 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,525 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,533 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,536 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,538 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:09,582 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 07:14:09,586 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:09,601 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:09,605 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:09,605 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:09,606 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:09,606 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:09,606 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:09,609 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:09,609 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,613 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:09,629 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:09,631 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:09,631 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:09,632 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:09,632 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:09,632 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:09,638 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:09,638 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,645 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 07:14:09,653 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-11-20 07:14:09,653 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_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:09,664 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 07:14:09,664 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 07:14:09,664 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 07:14:09,665 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec2_#in~j) = 1*rec2_#in~j Supporting invariants [] Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:09,671 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 07:14:09,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:09,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 07:14:09,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:09,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:09,749 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:14:09,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:14:09,802 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2019-11-20 07:14:09,803 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 21 states. Second operand 4 states. [2019-11-20 07:14:09,898 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 21 states.. Second operand 4 states. Result 36 states and 44 transitions. Complement of second has 12 states. [2019-11-20 07:14:09,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 07:14:09,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2019-11-20 07:14:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 7 transitions. [2019-11-20 07:14:09,901 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 3 letters. [2019-11-20 07:14:09,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:09,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 5 letters. Loop has 3 letters. [2019-11-20 07:14:09,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:09,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 7 transitions. Stem has 2 letters. Loop has 6 letters. [2019-11-20 07:14:09,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:09,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 36 states and 44 transitions. [2019-11-20 07:14:09,907 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 07:14:09,914 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 36 states to 23 states and 30 transitions. [2019-11-20 07:14:09,916 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-11-20 07:14:09,917 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 18 [2019-11-20 07:14:09,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 30 transitions. [2019-11-20 07:14:09,919 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 07:14:09,919 INFO L688 BuchiCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-11-20 07:14:09,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states and 30 transitions. [2019-11-20 07:14:09,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2019-11-20 07:14:09,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-20 07:14:09,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-20 07:14:09,956 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-20 07:14:09,956 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-20 07:14:09,956 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-11-20 07:14:09,957 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 24 transitions. [2019-11-20 07:14:09,959 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 07:14:09,960 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:14:09,960 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:14:09,961 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:14:09,961 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 07:14:09,962 INFO L794 eck$LassoCheckResult]: Stem: 125#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 108#L25 call main_#t~ret6 := rec2(main_~x~0);< 107#rec2ENTRY ~j := #in~j; 109#L18 assume !(~j <= 0); 111#L20 call #t~ret3 := rec2(~j - 1);< 110#rec2ENTRY ~j := #in~j; 112#L18 assume ~j <= 0;#res := 0; 121#rec2FINAL assume true; 122#rec2EXIT >#33#return; 117#L20-1 call #t~ret4 := rec1(#t~ret3);< 113#rec1ENTRY [2019-11-20 07:14:09,962 INFO L796 eck$LassoCheckResult]: Loop: 113#rec1ENTRY ~i := #in~i; 118#L12 assume !(~i <= 0); 114#L14 call #t~ret0 := rec1(~i - 2);< 113#rec1ENTRY [2019-11-20 07:14:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:09,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1361947899, now seen corresponding path program 1 times [2019-11-20 07:14:09,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:09,963 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418930148] [2019-11-20 07:14:09,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,002 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:10,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 1 times [2019-11-20 07:14:10,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:10,005 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255100985] [2019-11-20 07:14:10,006 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,019 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:10,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:10,021 INFO L82 PathProgramCache]: Analyzing trace with hash 766186353, now seen corresponding path program 1 times [2019-11-20 07:14:10,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:10,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608445143] [2019-11-20 07:14:10,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:10,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:10,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:10,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-20 07:14:10,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608445143] [2019-11-20 07:14:10,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:14:10,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-20 07:14:10,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376557792] [2019-11-20 07:14:10,182 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 07:14:10,182 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 07:14:10,182 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 07:14:10,182 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 07:14:10,182 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 07:14:10,182 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:10,182 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 07:14:10,182 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 07:14:10,183 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2019-11-20 07:14:10,183 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 07:14:10,183 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 07:14:10,184 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,192 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,195 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,197 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,200 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,202 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,237 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 07:14:10,237 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:10,249 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:10,250 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:10,261 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 07:14:10,261 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-11-20 07:14:10,312 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 07:14:10,314 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 07:14:10,314 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 07:14:10,314 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 07:14:10,314 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 07:14:10,314 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 07:14:10,314 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:10,314 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 07:14:10,314 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 07:14:10,314 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration2_Loop [2019-11-20 07:14:10,314 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 07:14:10,314 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 07:14:10,315 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,328 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,332 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,334 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,337 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,340 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:10,392 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 07:14:10,392 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/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) [2019-11-20 07:14:10,407 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:10,409 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:10,409 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:10,410 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:10,410 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:10,410 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:10,418 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:10,418 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 07:14:10,425 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:10,428 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 07:14:10,428 INFO L444 ModelExtractionUtils]: 1 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_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:10,442 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 07:14:10,443 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 07:14:10,443 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 07:14:10,443 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] [2019-11-20 07:14:10,449 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:10,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:10,537 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 07:14:10,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:10,587 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:14:10,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:10,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:14:10,618 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 07:14:10,618 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7 Second operand 5 states. [2019-11-20 07:14:10,738 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 24 transitions. cyclomatic complexity: 7. Second operand 5 states. Result 43 states and 58 transitions. Complement of second has 14 states. [2019-11-20 07:14:10,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 07:14:10,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 07:14:10,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 14 transitions. [2019-11-20 07:14:10,744 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 3 letters. [2019-11-20 07:14:10,745 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:10,746 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 13 letters. Loop has 3 letters. [2019-11-20 07:14:10,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:10,746 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 14 transitions. Stem has 10 letters. Loop has 6 letters. [2019-11-20 07:14:10,746 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:10,747 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 43 states and 58 transitions. [2019-11-20 07:14:10,756 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 07:14:10,763 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 43 states to 37 states and 50 transitions. [2019-11-20 07:14:10,764 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 25 [2019-11-20 07:14:10,765 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2019-11-20 07:14:10,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 50 transitions. [2019-11-20 07:14:10,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 07:14:10,766 INFO L688 BuchiCegarLoop]: Abstraction has 37 states and 50 transitions. [2019-11-20 07:14:10,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states and 50 transitions. [2019-11-20 07:14:10,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-11-20 07:14:10,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-20 07:14:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2019-11-20 07:14:10,781 INFO L711 BuchiCegarLoop]: Abstraction has 35 states and 46 transitions. [2019-11-20 07:14:10,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:14:10,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 07:14:10,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 07:14:10,786 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand 6 states. [2019-11-20 07:14:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:14:10,852 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2019-11-20 07:14:10,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 07:14:10,853 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 33 states and 43 transitions. [2019-11-20 07:14:10,857 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 07:14:10,861 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 33 states to 31 states and 40 transitions. [2019-11-20 07:14:10,863 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2019-11-20 07:14:10,864 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 26 [2019-11-20 07:14:10,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 40 transitions. [2019-11-20 07:14:10,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 07:14:10,864 INFO L688 BuchiCegarLoop]: Abstraction has 31 states and 40 transitions. [2019-11-20 07:14:10,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 40 transitions. [2019-11-20 07:14:10,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-11-20 07:14:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 07:14:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2019-11-20 07:14:10,873 INFO L711 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-20 07:14:10,873 INFO L591 BuchiCegarLoop]: Abstraction has 28 states and 34 transitions. [2019-11-20 07:14:10,874 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-11-20 07:14:10,874 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 28 states and 34 transitions. [2019-11-20 07:14:10,875 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 07:14:10,876 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-11-20 07:14:10,876 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-11-20 07:14:10,878 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 07:14:10,878 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-11-20 07:14:10,880 INFO L794 eck$LassoCheckResult]: Stem: 347#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet5, main_#t~ret6, main_~x~0;main_~x~0 := main_#t~nondet5;havoc main_#t~nondet5; 324#L25 call main_#t~ret6 := rec2(main_~x~0);< 323#rec2ENTRY ~j := #in~j; 325#L18 assume !(~j <= 0); 327#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 330#L18 assume !(~j <= 0); 328#L20 call #t~ret3 := rec2(~j - 1);< 326#rec2ENTRY ~j := #in~j; 329#L18 assume ~j <= 0;#res := 0; 340#rec2FINAL assume true; 341#rec2EXIT >#33#return; 332#L20-1 call #t~ret4 := rec1(#t~ret3);< 331#rec1ENTRY ~i := #in~i; 333#L12 assume ~i <= 0;#res := 0; 344#rec1FINAL assume true; 345#rec1EXIT >#35#return; 346#L20-2 #res := #t~ret4 - 1;havoc #t~ret3;havoc #t~ret4; 348#rec2FINAL assume true; 350#rec2EXIT >#33#return; 337#L20-1 call #t~ret4 := rec1(#t~ret3);< 342#rec1ENTRY [2019-11-20 07:14:10,880 INFO L796 eck$LassoCheckResult]: Loop: 342#rec1ENTRY ~i := #in~i; 349#L12 assume !(~i <= 0); 335#L14 call #t~ret0 := rec1(~i - 2);< 342#rec1ENTRY [2019-11-20 07:14:10,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:10,881 INFO L82 PathProgramCache]: Analyzing trace with hash -196165858, now seen corresponding path program 1 times [2019-11-20 07:14:10,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:10,881 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986005600] [2019-11-20 07:14:10,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,927 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:10,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:10,930 INFO L82 PathProgramCache]: Analyzing trace with hash 29941, now seen corresponding path program 2 times [2019-11-20 07:14:10,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:10,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124962400] [2019-11-20 07:14:10,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-20 07:14:10,941 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-20 07:14:10,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:10,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1473414328, now seen corresponding path program 1 times [2019-11-20 07:14:10,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 07:14:10,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039390266] [2019-11-20 07:14:10,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 07:14:10,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-20 07:14:11,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039390266] [2019-11-20 07:14:11,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 07:14:11,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-11-20 07:14:11,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330687089] [2019-11-20 07:14:11,127 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 07:14:11,127 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 07:14:11,127 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 07:14:11,127 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 07:14:11,128 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2019-11-20 07:14:11,128 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,128 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 07:14:11,128 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 07:14:11,128 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2019-11-20 07:14:11,128 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 07:14:11,128 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 07:14:11,130 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,135 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,138 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,141 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,144 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,149 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,196 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 07:14:11,197 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,211 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:11,211 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,218 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:11,219 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret2=0} Honda state: {rec1_#t~ret2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,236 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:11,237 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,245 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:11,245 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#res=0} Honda state: {rec1_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/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) [2019-11-20 07:14:11,262 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:11,262 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,267 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:11,267 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret0=0} Honda state: {rec1_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,283 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:11,284 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,289 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:11,289 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_#t~ret1=0} Honda state: {rec1_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,306 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:11,306 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,310 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-11-20 07:14:11,310 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec1_~i=0} Honda state: {rec1_~i=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,327 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-11-20 07:14:11,328 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,342 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-11-20 07:14:11,342 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,395 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-11-20 07:14:11,396 INFO L210 LassoAnalysis]: Preferences: [2019-11-20 07:14:11,397 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2019-11-20 07:14:11,397 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-11-20 07:14:11,397 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2019-11-20 07:14:11,397 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2019-11-20 07:14:11,397 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,397 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2019-11-20 07:14:11,397 INFO L132 ssoRankerPreferences]: Path of dumped script: [2019-11-20 07:14:11,397 INFO L133 ssoRankerPreferences]: Filename of dumped script: NestedRecursion_1c.c_Iteration3_Loop [2019-11-20 07:14:11,397 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2019-11-20 07:14:11,406 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-11-20 07:14:11,407 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [MP z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-11-20 07:14:11,425 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,427 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,430 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,436 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,443 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-11-20 07:14:11,496 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-11-20 07:14:11,496 INFO L489 LassoAnalysis]: Using template 'affine'. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/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 [2019-11-20 07:14:11,513 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:11,515 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:11,515 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:11,516 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:11,516 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:11,516 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:11,517 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:11,517 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 07:14:11,520 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/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) [2019-11-20 07:14:11,527 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:11,529 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:11,529 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:11,529 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:11,529 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:11,530 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:11,530 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:11,531 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,533 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,549 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:11,551 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:11,551 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:11,551 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:11,551 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:11,551 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:11,552 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:11,552 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,555 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/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 [2019-11-20 07:14:11,562 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:11,565 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:11,565 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:11,565 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:11,566 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:11,566 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:11,567 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:11,567 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-11-20 07:14:11,569 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d6e75eaf-c734-4682-af82-8115a1beeb5b/bin/uautomizer/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-11-20 07:14:11,580 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSES Number of strict supporting invariants: 0 Number of non-strict supporting invariants: 1 Consider only non-deceasing supporting invariants: true Simplify termination arguments: true Simplify supporting invariants: trueOverapproximate stem: false [2019-11-20 07:14:11,583 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2019-11-20 07:14:11,583 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-11-20 07:14:11,583 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2019-11-20 07:14:11,583 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2019-11-20 07:14:11,583 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2019-11-20 07:14:11,585 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-11-20 07:14:11,585 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,595 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-11-20 07:14:11,598 INFO L443 ModelExtractionUtils]: Simplification made 2 calls to the SMT solver. [2019-11-20 07:14:11,599 INFO L444 ModelExtractionUtils]: 1 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_d6e75eaf-c734-4682-af82-8115a1beeb5b/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) [2019-11-20 07:14:11,603 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-11-20 07:14:11,603 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-11-20 07:14:11,603 INFO L510 LassoAnalysis]: Proved termination. [2019-11-20 07:14:11,603 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec1_#in~i) = 1*rec1_#in~i Supporting invariants [] Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-11-20 07:14:11,609 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-11-20 07:14:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 07:14:11,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:11,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:14:11,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:14:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:14:11,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:14:11,750 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 07:14:11,751 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-11-20 07:14:11,842 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2019-11-20 07:14:11,845 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 07:14:11,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 07:14:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-11-20 07:14:11,846 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2019-11-20 07:14:11,846 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:11,846 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 07:14:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 07:14:11,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:11,939 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:14:11,942 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:14:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:11,953 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:14:11,953 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:14:11,980 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 07:14:11,981 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-11-20 07:14:12,044 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 31 states and 37 transitions. Complement of second has 7 states. [2019-11-20 07:14:12,045 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 2 stem states 1 non-accepting loop states 1 accepting loop states [2019-11-20 07:14:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 07:14:12,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 12 transitions. [2019-11-20 07:14:12,046 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 12 transitions. Stem has 21 letters. Loop has 3 letters. [2019-11-20 07:14:12,046 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:12,046 INFO L639 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-11-20 07:14:12,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 07:14:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:12,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 07:14:12,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:12,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:14:12,136 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 07:14:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 07:14:12,152 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 07:14:12,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 07:14:12,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 07:14:12,178 INFO L152 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2019-11-20 07:14:12,178 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-11-20 07:14:12,308 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 28 states and 34 transitions. cyclomatic complexity: 8. Second operand 5 states. Result 53 states and 65 transitions. Complement of second has 13 states. [2019-11-20 07:14:12,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2019-11-20 07:14:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-11-20 07:14:12,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 28 transitions. [2019-11-20 07:14:12,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 3 letters. [2019-11-20 07:14:12,310 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:12,310 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 24 letters. Loop has 3 letters. [2019-11-20 07:14:12,311 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:12,311 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 28 transitions. Stem has 21 letters. Loop has 6 letters. [2019-11-20 07:14:12,311 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-11-20 07:14:12,311 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 53 states and 65 transitions. [2019-11-20 07:14:12,313 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 5 [2019-11-20 07:14:12,315 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 53 states to 41 states and 52 transitions. [2019-11-20 07:14:12,315 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 28 [2019-11-20 07:14:12,315 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 31 [2019-11-20 07:14:12,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 52 transitions. [2019-11-20 07:14:12,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-11-20 07:14:12,316 INFO L688 BuchiCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-11-20 07:14:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states and 52 transitions. [2019-11-20 07:14:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-20 07:14:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 07:14:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-20 07:14:12,329 INFO L711 BuchiCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-20 07:14:12,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 07:14:12,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 07:14:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-20 07:14:12,330 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 8 states. [2019-11-20 07:14:12,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 07:14:12,393 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-11-20 07:14:12,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 07:14:12,393 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 27 states and 29 transitions. [2019-11-20 07:14:12,394 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 07:14:12,394 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 27 states to 0 states and 0 transitions. [2019-11-20 07:14:12,394 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-11-20 07:14:12,394 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-11-20 07:14:12,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-11-20 07:14:12,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-11-20 07:14:12,395 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 07:14:12,395 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 07:14:12,395 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 07:14:12,395 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-11-20 07:14:12,395 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-11-20 07:14:12,395 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-11-20 07:14:12,395 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-11-20 07:14:12,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 20.11 07:14:12 BoogieIcfgContainer [2019-11-20 07:14:12,400 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-11-20 07:14:12,400 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 07:14:12,400 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 07:14:12,401 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 07:14:12,401 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:14:08" (3/4) ... [2019-11-20 07:14:12,404 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-11-20 07:14:12,404 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 07:14:12,406 INFO L168 Benchmark]: Toolchain (without parser) took 4142.95 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 940.6 MB in the beginning and 1.0 GB in the end (delta: -92.7 MB). Peak memory consumption was 84.0 MB. Max. memory is 11.5 GB. [2019-11-20 07:14:12,406 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:14:12,407 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 940.6 MB in the beginning and 1.2 GB in the end (delta: -236.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. [2019-11-20 07:14:12,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-20 07:14:12,408 INFO L168 Benchmark]: Boogie Preprocessor took 18.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. [2019-11-20 07:14:12,408 INFO L168 Benchmark]: RCFGBuilder took 272.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:14:12,409 INFO L168 Benchmark]: BuchiAutomizer took 3492.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 122.4 MB). Peak memory consumption was 122.4 MB. Max. memory is 11.5 GB. [2019-11-20 07:14:12,409 INFO L168 Benchmark]: Witness Printer took 3.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 07:14:12,412 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 960.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 314.79 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 176.7 MB). Free memory was 940.6 MB in the beginning and 1.2 GB in the end (delta: -236.2 MB). Peak memory consumption was 20.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.21 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 18.53 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 272.79 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 3492.03 ms. Allocated memory is still 1.2 GB. Free memory was 1.2 GB in the beginning and 1.0 GB in the end (delta: 122.4 MB). Peak memory consumption was 122.4 MB. Max. memory is 11.5 GB. * Witness Printer took 3.75 ms. Allocated memory is still 1.2 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 5 terminating modules (2 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(j) and consists of 4 locations. One deterministic module has affine ranking function \old(i) and consists of 5 locations. One nondeterministic module has affine ranking function \old(i) and consists of 5 locations. 2 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 3.4s and 4 iterations. TraceHistogramMax:3. Analysis of lassos took 1.8s. Construction of modules took 0.2s. Büchi inclusion checks took 1.1s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 4. Automata minimization 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 4 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 28 states and ocurred in iteration 2. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 88 SDtfs, 94 SDslu, 174 SDs, 0 SdLazy, 126 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq153 hnf94 smp100 dnf100 smp100 tf112 neg100 sie110 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: unsat Degree: 0 Time: 25ms VariablesStem: 0 VariablesLoop: 0 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 8 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.3s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...