./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-numeric/rec_counter3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-numeric/rec_counter3.c -s /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 639f18bc5de28da6eb107c1e55f1eb45909efdef ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:57:01,174 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:57:01,176 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:57:01,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:57:01,186 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:57:01,187 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:57:01,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:57:01,190 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:57:01,192 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:57:01,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:57:01,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:57:01,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:57:01,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:57:01,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:57:01,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:57:01,197 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:57:01,198 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:57:01,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:57:01,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:57:01,201 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:57:01,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:57:01,203 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:57:01,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:57:01,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:57:01,206 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:57:01,206 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:57:01,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:57:01,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:57:01,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:57:01,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:57:01,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:57:01,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:57:01,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:57:01,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:57:01,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:57:01,212 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:57:01,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:57:01,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:57:01,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:57:01,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:57:01,214 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:57:01,214 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/config/svcomp-Termination-64bit-Automizer_Default.epf [2019-10-22 08:57:01,225 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:57:01,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:57:01,226 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:57:01,227 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:57:01,227 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:57:01,227 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2019-10-22 08:57:01,227 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2019-10-22 08:57:01,227 INFO L138 SettingsManager]: * Use old map elimination=false [2019-10-22 08:57:01,228 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2019-10-22 08:57:01,228 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2019-10-22 08:57:01,228 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2019-10-22 08:57:01,228 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:57:01,228 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-10-22 08:57:01,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2019-10-22 08:57:01,229 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:57:01,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2019-10-22 08:57:01,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:57:01,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:57:01,230 INFO L138 SettingsManager]: * To the following directory=/home/matthias/ultimate/dump [2019-10-22 08:57:01,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:57:01,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:57:01,231 INFO L138 SettingsManager]: * Dump automata to the following directory=/home/matthias/ultimate/dump/auto [2019-10-22 08:57:01,232 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2019-10-22 08:57:01,232 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/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 -> 639f18bc5de28da6eb107c1e55f1eb45909efdef [2019-10-22 08:57:01,270 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:57:01,280 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:57:01,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:57:01,288 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:57:01,288 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:57:01,289 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/../../sv-benchmarks/c/termination-numeric/rec_counter3.c [2019-10-22 08:57:01,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/data/ef54a9333/13b78bd6491f40de831a9b0ef190261e/FLAG01b9b6924 [2019-10-22 08:57:01,732 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:57:01,732 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/sv-benchmarks/c/termination-numeric/rec_counter3.c [2019-10-22 08:57:01,737 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/data/ef54a9333/13b78bd6491f40de831a9b0ef190261e/FLAG01b9b6924 [2019-10-22 08:57:01,748 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/data/ef54a9333/13b78bd6491f40de831a9b0ef190261e [2019-10-22 08:57:01,750 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:57:01,751 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:57:01,752 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:01,752 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:57:01,755 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:57:01,756 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:01" (1/1) ... [2019-10-22 08:57:01,758 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cdef3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:01, skipping insertion in model container [2019-10-22 08:57:01,758 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:57:01" (1/1) ... [2019-10-22 08:57:01,765 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:57:01,779 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:57:01,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:01,958 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:57:02,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:57:02,052 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:57:02,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02 WrapperNode [2019-10-22 08:57:02,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:57:02,054 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:02,054 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:57:02,054 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:57:02,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,066 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,081 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:57:02,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:57:02,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:57:02,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:57:02,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,097 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... [2019-10-22 08:57:02,098 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:57:02,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:57:02,099 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:57:02,099 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:57:02,099 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 [2019-10-22 08:57:02,144 INFO L130 BoogieDeclarations]: Found specification of procedure rec [2019-10-22 08:57:02,144 INFO L138 BoogieDeclarations]: Found implementation of procedure rec [2019-10-22 08:57:02,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:57:02,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:57:02,284 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:57:02,284 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-22 08:57:02,285 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:02 BoogieIcfgContainer [2019-10-22 08:57:02,285 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:57:02,285 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2019-10-22 08:57:02,286 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2019-10-22 08:57:02,289 INFO L275 PluginConnector]: BuchiAutomizer initialized [2019-10-22 08:57:02,289 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:57:02,290 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 22.10 08:57:01" (1/3) ... [2019-10-22 08:57:02,290 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@bb8bae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:57:02, skipping insertion in model container [2019-10-22 08:57:02,291 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:57:02,291 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:57:02" (2/3) ... [2019-10-22 08:57:02,291 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@bb8bae4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 22.10 08:57:02, skipping insertion in model container [2019-10-22 08:57:02,291 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2019-10-22 08:57:02,291 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:02" (3/3) ... [2019-10-22 08:57:02,293 INFO L371 chiAutomizerObserver]: Analyzing ICFG rec_counter3.c [2019-10-22 08:57:02,383 INFO L356 BuchiCegarLoop]: Interprodecural is true [2019-10-22 08:57:02,383 INFO L357 BuchiCegarLoop]: Hoare is false [2019-10-22 08:57:02,383 INFO L358 BuchiCegarLoop]: Compute interpolants for ForwardPredicates [2019-10-22 08:57:02,383 INFO L359 BuchiCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:57:02,383 INFO L360 BuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:57:02,383 INFO L361 BuchiCegarLoop]: Difference is false [2019-10-22 08:57:02,384 INFO L362 BuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:57:02,384 INFO L365 BuchiCegarLoop]: ======== Iteration 0==of CEGAR loop == BuchiCegarLoop======== [2019-10-22 08:57:02,404 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2019-10-22 08:57:02,435 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 5 [2019-10-22 08:57:02,443 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:02,443 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:02,457 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 08:57:02,458 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:57:02,458 INFO L424 BuchiCegarLoop]: ======== Iteration 1============ [2019-10-22 08:57:02,458 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 16 states. [2019-10-22 08:57:02,464 INFO L131 ngComponentsAnalysis]: Automaton has 3 accepting balls. 5 [2019-10-22 08:57:02,464 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:02,464 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:02,464 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1] [2019-10-22 08:57:02,464 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1, 1, 1] [2019-10-22 08:57:02,480 INFO L791 eck$LassoCheckResult]: Stem: 10#ULTIMATE.startENTRYtrue havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 5#L18true assume !(main_~i~0 <= 0); 9#L20true call main_#t~ret3 := rec(main_~i~0);< 3#recENTRYtrue [2019-10-22 08:57:02,480 INFO L793 eck$LassoCheckResult]: Loop: 3#recENTRYtrue ~a := #in~a; 8#L5true assume !(0 == ~a); 11#L8true call #t~ret0 := rec(~a - 1);< 3#recENTRYtrue [2019-10-22 08:57:02,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:02,485 INFO L82 PathProgramCache]: Analyzing trace with hash 51816, now seen corresponding path program 1 times [2019-10-22 08:57:02,493 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:02,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561898599] [2019-10-22 08:57:02,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:02,494 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:02,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:02,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:02,580 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:02,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash 29959, now seen corresponding path program 1 times [2019-10-22 08:57:02,581 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:02,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873802960] [2019-10-22 08:57:02,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:02,582 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:02,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:02,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:02,593 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:02,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:02,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1543650624, now seen corresponding path program 1 times [2019-10-22 08:57:02,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:02,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26776577] [2019-10-22 08:57:02,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:02,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:02,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:02,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:02,609 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:02,667 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:02,667 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:02,667 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:02,668 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:02,668 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:57:02,668 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,668 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:02,668 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:02,668 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration1_Loop [2019-10-22 08:57:02,668 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:02,669 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:02,689 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,698 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,701 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,703 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,706 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,709 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,717 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,774 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:02,774 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 [2019-10-22 08:57:02,781 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,782 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:02,789 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,789 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~ret0=0} Honda state: {rec_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 [2019-10-22 08:57:02,800 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,800 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:02,802 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,803 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~res~0=0} Honda state: {rec_~res~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 [2019-10-22 08:57:02,807 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,808 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:02,811 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,811 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~post1=0} Honda state: {rec_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:02,823 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,823 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,827 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,827 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#res=0} Honda state: {rec_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,833 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,833 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:02,835 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,835 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~a=0} Honda state: {rec_~a=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,840 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,840 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,849 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:57:02,849 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:02,865 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,865 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#in~a=-1} Honda state: {rec_#in~a=-1} Generalized eigenvectors: [{rec_#in~a=-1}, {rec_#in~a=0}, {rec_#in~a=0}] Lambdas: [1, 0, 9] Nus: [0, 0] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,871 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:02,871 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:02,876 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:02,876 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~rescopy~0=0} Honda state: {rec_~rescopy~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2019-10-22 08:57:02,918 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:02,918 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:02,918 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:02,918 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:02,918 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:57:02,919 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:02,919 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:02,919 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:02,919 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration1_Lasso [2019-10-22 08:57:02,920 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:02,920 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:02,921 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,926 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,930 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,934 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,937 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,939 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,943 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,947 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,951 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,956 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,958 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,961 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:02,971 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,034 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:03,034 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:57:03,043 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,044 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,049 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,049 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#res=0} Honda state: {ULTIMATE.start_main_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:57:03,060 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,060 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,064 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,064 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~ret0=0} Honda state: {rec_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,071 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,071 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,075 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,075 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#t~post1=0} Honda state: {rec_#t~post1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,082 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,082 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,087 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,088 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~ret3=0} Honda state: {ULTIMATE.start_main_#t~ret3=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,095 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,095 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 [2019-10-22 08:57:03,098 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,099 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_#t~nondet2=0} Honda state: {ULTIMATE.start_main_#t~nondet2=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,104 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,104 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:03,106 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,106 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_#res=0} Honda state: {rec_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,111 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,112 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:03,114 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,114 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~a=0} Honda state: {rec_~a=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,123 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,123 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 [2019-10-22 08:57:03,128 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,128 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_main_~i~0=0} Honda state: {ULTIMATE.start_main_~i~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,134 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,134 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 [2019-10-22 08:57:03,137 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,137 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~rescopy~0=0} Honda state: {rec_~rescopy~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,144 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,144 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,147 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,147 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {rec_~res~0=0} Honda state: {rec_~res~0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,157 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:03,160 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2019-10-22 08:57:03,160 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {ULTIMATE.start_#t~ret4=0} Honda state: {ULTIMATE.start_#t~ret4=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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 [2019-10-22 08:57:03,168 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:03,168 INFO L160 nArgumentSynthesizer]: Using integer mode. No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:03,185 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:57:03,185 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,204 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:57:03,206 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:03,206 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:03,206 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:03,206 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:03,206 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:57:03,206 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:03,206 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:03,207 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:03,207 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration1_Lasso [2019-10-22 08:57:03,207 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:03,207 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:03,208 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,213 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,215 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,217 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,220 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,224 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,227 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,230 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,232 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,235 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,238 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,241 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,252 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:03,316 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:03,321 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:57:03,322 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 [2019-10-22 08:57:03,323 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,324 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,324 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,324 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,325 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,326 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,327 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,330 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,330 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 [2019-10-22 08:57:03,331 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,331 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,331 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,331 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,332 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,332 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,332 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,333 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,333 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 [2019-10-22 08:57:03,334 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,334 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,334 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,335 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,335 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,335 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,335 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,336 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,336 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 [2019-10-22 08:57:03,337 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,337 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,337 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,337 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,338 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,338 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,338 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,339 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,340 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 [2019-10-22 08:57:03,340 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,341 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,341 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,341 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,342 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,342 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,342 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,344 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,349 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 [2019-10-22 08:57:03,350 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,351 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,351 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,351 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,351 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,351 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,351 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,352 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,353 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 [2019-10-22 08:57:03,353 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,353 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,354 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,354 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,354 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,354 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,355 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,356 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,356 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 [2019-10-22 08:57:03,357 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,357 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,357 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,357 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,357 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,358 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,358 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,359 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,360 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 [2019-10-22 08:57:03,360 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,361 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,361 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,361 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,361 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,361 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,362 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,363 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,363 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 [2019-10-22 08:57:03,364 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,364 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,364 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,364 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,364 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,365 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,365 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,366 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,366 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 [2019-10-22 08:57:03,367 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,367 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:03,367 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,367 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:03,367 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,368 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:03,368 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:03,369 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:03,369 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 [2019-10-22 08:57:03,370 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:03,370 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:03,370 INFO L203 nArgumentSynthesizer]: 2 loop disjuncts [2019-10-22 08:57:03,371 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:03,377 INFO L400 nArgumentSynthesizer]: We have 16 Motzkin's Theorem applications. [2019-10-22 08:57:03,377 INFO L401 nArgumentSynthesizer]: A total of 4 supporting invariants were added. [2019-10-22 08:57:03,496 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:57:03,580 INFO L443 ModelExtractionUtils]: Simplification made 6 calls to the SMT solver. [2019-10-22 08:57:03,586 INFO L444 ModelExtractionUtils]: 5 out of 11 variables were initially zero. Simplification set additionally 3 variables to zero. [2019-10-22 08:57:03,588 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:57:03,594 INFO L438 nArgumentSynthesizer]: Removed 3 redundant supporting invariants from a total of 4. [2019-10-22 08:57:03,595 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:57:03,595 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec_#in~a) = 1*rec_#in~a Supporting invariants [1*rec_#in~a >= 0] [2019-10-22 08:57:03,600 INFO L297 tatePredicateManager]: 0 out of 1 supporting invariants were superfluous and have been removed [2019-10-22 08:57:03,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:03,640 INFO L256 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:57:03,642 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:03,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:57:03,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:03,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:03,713 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 [2019-10-22 08:57:03,714 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 16 states. Second operand 5 states. [2019-10-22 08:57:03,843 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 16 states.. Second operand 5 states. Result 34 states and 42 transitions. Complement of second has 13 states. [2019-10-22 08:57:03,844 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 [2019-10-22 08:57:03,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2019-10-22 08:57:03,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 11 transitions. [2019-10-22 08:57:03,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 3 letters. [2019-10-22 08:57:03,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:03,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 6 letters. Loop has 3 letters. [2019-10-22 08:57:03,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:03,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 11 transitions. Stem has 3 letters. Loop has 6 letters. [2019-10-22 08:57:03,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:03,850 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 34 states and 42 transitions. [2019-10-22 08:57:03,854 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:03,861 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 34 states to 22 states and 29 transitions. [2019-10-22 08:57:03,862 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 15 [2019-10-22 08:57:03,862 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-10-22 08:57:03,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 29 transitions. [2019-10-22 08:57:03,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:57:03,865 INFO L688 BuchiCegarLoop]: Abstraction has 22 states and 29 transitions. [2019-10-22 08:57:03,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 29 transitions. [2019-10-22 08:57:03,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-10-22 08:57:03,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-22 08:57:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-10-22 08:57:03,893 INFO L711 BuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-10-22 08:57:03,893 INFO L591 BuchiCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-10-22 08:57:03,893 INFO L424 BuchiCegarLoop]: ======== Iteration 2============ [2019-10-22 08:57:03,893 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 20 states and 25 transitions. [2019-10-22 08:57:03,894 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:03,894 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:03,894 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:03,895 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:03,895 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-10-22 08:57:03,895 INFO L791 eck$LassoCheckResult]: Stem: 128#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 122#L18 assume !(main_~i~0 <= 0); 116#L20 call main_#t~ret3 := rec(main_~i~0);< 115#recENTRY ~a := #in~a; 118#L5 assume 0 == ~a;#res := 0; 125#recFINAL assume true; 132#recEXIT >#47#return; 123#L20-1 main_~res~1 := main_#t~ret3;havoc main_#t~ret3; 124#L21-2 [2019-10-22 08:57:03,895 INFO L793 eck$LassoCheckResult]: Loop: 124#L21-2 assume !!(main_~res~1 < 1); 124#L21-2 [2019-10-22 08:57:03,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:03,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1684481175, now seen corresponding path program 1 times [2019-10-22 08:57:03,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:03,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782085962] [2019-10-22 08:57:03,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:03,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:03,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:03,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:03,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782085962] [2019-10-22 08:57:03,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:03,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-22 08:57:03,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717440351] [2019-10-22 08:57:03,972 INFO L796 eck$LassoCheckResult]: stem already infeasible [2019-10-22 08:57:03,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 69, now seen corresponding path program 1 times [2019-10-22 08:57:03,973 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:03,973 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649389865] [2019-10-22 08:57:03,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:03,973 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:03,973 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:03,980 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:03,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:03,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:03,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:03,988 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. cyclomatic complexity: 8 Second operand 5 states. [2019-10-22 08:57:04,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:04,024 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-10-22 08:57:04,024 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:04,025 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 20 states and 23 transitions. [2019-10-22 08:57:04,026 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:04,027 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 20 states to 17 states and 20 transitions. [2019-10-22 08:57:04,027 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 14 [2019-10-22 08:57:04,027 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2019-10-22 08:57:04,027 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 20 transitions. [2019-10-22 08:57:04,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:57:04,027 INFO L688 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-10-22 08:57:04,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states and 20 transitions. [2019-10-22 08:57:04,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-22 08:57:04,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-22 08:57:04,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-10-22 08:57:04,029 INFO L711 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-10-22 08:57:04,029 INFO L591 BuchiCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-10-22 08:57:04,029 INFO L424 BuchiCegarLoop]: ======== Iteration 3============ [2019-10-22 08:57:04,029 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 20 transitions. [2019-10-22 08:57:04,030 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:04,030 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:04,030 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:04,031 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:04,031 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-10-22 08:57:04,031 INFO L791 eck$LassoCheckResult]: Stem: 181#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 175#L18 assume !(main_~i~0 <= 0); 170#L20 call main_#t~ret3 := rec(main_~i~0);< 169#recENTRY ~a := #in~a; 171#L5 assume !(0 == ~a); 173#L8 call #t~ret0 := rec(~a - 1);< 172#recENTRY ~a := #in~a; 174#L5 assume 0 == ~a;#res := 0; 178#recFINAL assume true; 184#recEXIT >#45#return; 182#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 179#L10-2 [2019-10-22 08:57:04,031 INFO L793 eck$LassoCheckResult]: Loop: 179#L10-2 assume !!(~rescopy~0 > 0);#t~post1 := ~rescopy~0;~rescopy~0 := #t~post1 - 1;havoc #t~post1; 179#L10-2 [2019-10-22 08:57:04,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1511241834, now seen corresponding path program 1 times [2019-10-22 08:57:04,035 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281033085] [2019-10-22 08:57:04,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,036 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,053 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,054 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 1 times [2019-10-22 08:57:04,054 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142214752] [2019-10-22 08:57:04,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,055 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,058 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,059 INFO L82 PathProgramCache]: Analyzing trace with hash -396143387, now seen corresponding path program 1 times [2019-10-22 08:57:04,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339595562] [2019-10-22 08:57:04,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:04,099 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339595562] [2019-10-22 08:57:04,099 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:57:04,099 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-22 08:57:04,099 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170782444] [2019-10-22 08:57:04,108 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:04,109 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:04,109 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:04,109 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:04,109 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:57:04,109 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:04,109 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:04,109 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:04,109 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration3_Loop [2019-10-22 08:57:04,109 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:04,110 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:04,110 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,120 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,136 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:04,137 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:04,143 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:04,143 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2019-10-22 08:57:04,157 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:57:04,157 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:04,163 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:57:04,165 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:04,165 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:04,165 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:04,165 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:04,165 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:57:04,165 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:04,165 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:04,165 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:04,166 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration3_Loop [2019-10-22 08:57:04,166 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:04,166 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:04,166 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,169 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,198 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:04,198 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:57:04,198 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 [2019-10-22 08:57:04,199 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:04,200 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:04,200 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:04,200 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:04,200 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:04,201 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:04,201 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:04,207 INFO L522 LassoAnalysis]: Proving termination failed for this template and these settings. [2019-10-22 08:57:04,207 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 [2019-10-22 08:57:04,208 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:04,208 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:04,208 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:04,208 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:04,209 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:04,209 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:04,209 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:04,215 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:57:04,216 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:57:04,217 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:57:04,217 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:57:04,217 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:57:04,217 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:57:04,217 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec_~rescopy~0) = 1*rec_~rescopy~0 Supporting invariants [] [2019-10-22 08:57:04,218 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:57:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,257 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,258 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,292 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:04,293 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2019-10-22 08:57:04,293 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 6 Second operand 3 states. [2019-10-22 08:57:04,347 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 20 transitions. cyclomatic complexity: 6. Second operand 3 states. Result 37 states and 49 transitions. Complement of second has 10 states. [2019-10-22 08:57:04,348 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 [2019-10-22 08:57:04,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 08:57:04,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 14 transitions. [2019-10-22 08:57:04,351 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 11 letters. Loop has 1 letters. [2019-10-22 08:57:04,351 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:04,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 12 letters. Loop has 1 letters. [2019-10-22 08:57:04,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:04,352 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 14 transitions. Stem has 11 letters. Loop has 2 letters. [2019-10-22 08:57:04,352 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:04,352 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 37 states and 49 transitions. [2019-10-22 08:57:04,354 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:04,358 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 37 states to 31 states and 41 transitions. [2019-10-22 08:57:04,358 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 22 [2019-10-22 08:57:04,359 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-10-22 08:57:04,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 41 transitions. [2019-10-22 08:57:04,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:57:04,360 INFO L688 BuchiCegarLoop]: Abstraction has 31 states and 41 transitions. [2019-10-22 08:57:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states and 41 transitions. [2019-10-22 08:57:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-22 08:57:04,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-22 08:57:04,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2019-10-22 08:57:04,366 INFO L711 BuchiCegarLoop]: Abstraction has 31 states and 41 transitions. [2019-10-22 08:57:04,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:04,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:57:04,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:57:04,369 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand 5 states. [2019-10-22 08:57:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:04,387 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2019-10-22 08:57:04,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:57:04,389 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 35 transitions. [2019-10-22 08:57:04,390 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:04,391 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 29 states and 35 transitions. [2019-10-22 08:57:04,391 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 24 [2019-10-22 08:57:04,391 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 24 [2019-10-22 08:57:04,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 35 transitions. [2019-10-22 08:57:04,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:57:04,391 INFO L688 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-22 08:57:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states and 35 transitions. [2019-10-22 08:57:04,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-22 08:57:04,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-22 08:57:04,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2019-10-22 08:57:04,396 INFO L711 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-22 08:57:04,396 INFO L591 BuchiCegarLoop]: Abstraction has 29 states and 35 transitions. [2019-10-22 08:57:04,396 INFO L424 BuchiCegarLoop]: ======== Iteration 4============ [2019-10-22 08:57:04,397 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 29 states and 35 transitions. [2019-10-22 08:57:04,397 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 2 [2019-10-22 08:57:04,398 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:04,398 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:04,398 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:04,398 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-10-22 08:57:04,399 INFO L791 eck$LassoCheckResult]: Stem: 366#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 362#L18 assume !(main_~i~0 <= 0); 355#L20 call main_#t~ret3 := rec(main_~i~0);< 354#recENTRY ~a := #in~a; 356#L5 assume !(0 == ~a); 358#L8 call #t~ret0 := rec(~a - 1);< 357#recENTRY ~a := #in~a; 361#L5 assume 0 == ~a;#res := 0; 363#recFINAL assume true; 373#recEXIT >#45#return; 381#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 378#L10-2 assume !(~rescopy~0 > 0); 379#L10-3 #res := 1 + ~res~0; 382#recFINAL assume true; 374#recEXIT >#47#return; 364#L20-1 main_~res~1 := main_#t~ret3;havoc main_#t~ret3; 365#L21-2 [2019-10-22 08:57:04,399 INFO L793 eck$LassoCheckResult]: Loop: 365#L21-2 assume !!(main_~res~1 < 1); 365#L21-2 [2019-10-22 08:57:04,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1423892654, now seen corresponding path program 1 times [2019-10-22 08:57:04,400 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963145028] [2019-10-22 08:57:04,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,428 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,429 INFO L82 PathProgramCache]: Analyzing trace with hash 69, now seen corresponding path program 2 times [2019-10-22 08:57:04,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519524682] [2019-10-22 08:57:04,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,435 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1190999276, now seen corresponding path program 1 times [2019-10-22 08:57:04,436 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,436 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786101436] [2019-10-22 08:57:04,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:04,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786101436] [2019-10-22 08:57:04,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599121207] [2019-10-22 08:57:04,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:57:04,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-22 08:57:04,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:57:04,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 10 [2019-10-22 08:57:04,628 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676499748] [2019-10-22 08:57:04,633 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:57:04,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-22 08:57:04,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-22 08:57:04,634 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. cyclomatic complexity: 9 Second operand 8 states. [2019-10-22 08:57:04,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:57:04,660 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2019-10-22 08:57:04,661 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-22 08:57:04,661 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 29 states and 34 transitions. [2019-10-22 08:57:04,662 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-10-22 08:57:04,663 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 29 states to 22 states and 26 transitions. [2019-10-22 08:57:04,663 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 17 [2019-10-22 08:57:04,663 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 17 [2019-10-22 08:57:04,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 26 transitions. [2019-10-22 08:57:04,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2019-10-22 08:57:04,664 INFO L688 BuchiCegarLoop]: Abstraction has 22 states and 26 transitions. [2019-10-22 08:57:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states and 26 transitions. [2019-10-22 08:57:04,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2019-10-22 08:57:04,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-22 08:57:04,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2019-10-22 08:57:04,666 INFO L711 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 08:57:04,666 INFO L591 BuchiCegarLoop]: Abstraction has 19 states and 22 transitions. [2019-10-22 08:57:04,666 INFO L424 BuchiCegarLoop]: ======== Iteration 5============ [2019-10-22 08:57:04,666 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 19 states and 22 transitions. [2019-10-22 08:57:04,667 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 1 [2019-10-22 08:57:04,667 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2019-10-22 08:57:04,667 INFO L119 BuchiIsEmpty]: Starting construction of run [2019-10-22 08:57:04,671 INFO L849 BuchiCegarLoop]: Counterexample stem histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-10-22 08:57:04,671 INFO L850 BuchiCegarLoop]: Counterexample loop histogram [1] [2019-10-22 08:57:04,671 INFO L791 eck$LassoCheckResult]: Stem: 504#ULTIMATE.startENTRY havoc main_#res;havoc main_#t~nondet2, main_#t~ret3, main_~i~0, main_~res~1;main_~i~0 := main_#t~nondet2;havoc main_#t~nondet2; 505#L18 assume !(main_~i~0 <= 0); 495#L20 call main_#t~ret3 := rec(main_~i~0);< 494#recENTRY ~a := #in~a; 496#L5 assume !(0 == ~a); 498#L8 call #t~ret0 := rec(~a - 1);< 497#recENTRY ~a := #in~a; 500#L5 assume !(0 == ~a); 499#L8 call #t~ret0 := rec(~a - 1);< 497#recENTRY ~a := #in~a; 501#L5 assume 0 == ~a;#res := 0; 510#recFINAL assume true; 512#recEXIT >#45#return; 511#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 502#L10-2 assume !(~rescopy~0 > 0); 503#L10-3 #res := 1 + ~res~0; 508#recFINAL assume true; 509#recEXIT >#45#return; 506#L8-1 ~res~0 := #t~ret0;havoc #t~ret0;~rescopy~0 := ~res~0; 507#L10-2 [2019-10-22 08:57:04,671 INFO L793 eck$LassoCheckResult]: Loop: 507#L10-2 assume !!(~rescopy~0 > 0);#t~post1 := ~rescopy~0;~rescopy~0 := #t~post1 - 1;havoc #t~post1; 507#L10-2 [2019-10-22 08:57:04,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,671 INFO L82 PathProgramCache]: Analyzing trace with hash -274003163, now seen corresponding path program 1 times [2019-10-22 08:57:04,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244981186] [2019-10-22 08:57:04,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,686 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,687 INFO L82 PathProgramCache]: Analyzing trace with hash 46, now seen corresponding path program 2 times [2019-10-22 08:57:04,687 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149640732] [2019-10-22 08:57:04,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,687 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,690 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,691 INFO L82 PathProgramCache]: Analyzing trace with hash 95836554, now seen corresponding path program 1 times [2019-10-22 08:57:04,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:57:04,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578662503] [2019-10-22 08:57:04,691 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,695 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:57:04,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:57:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-10-22 08:57:04,712 INFO L168 tionRefinementEngine]: Strategy CAMEL found a feasible trace [2019-10-22 08:57:04,727 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:04,727 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:04,727 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:04,727 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:04,727 INFO L127 ssoRankerPreferences]: Use exernal solver: true [2019-10-22 08:57:04,727 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:04,727 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:04,727 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:04,728 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration5_Loop [2019-10-22 08:57:04,728 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:04,728 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:04,728 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,734 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,749 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:04,749 INFO L404 LassoAnalysis]: Checking for nontermination... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/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) [2019-10-22 08:57:04,758 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2019-10-22 08:57:04,758 INFO L160 nArgumentSynthesizer]: Using integer mode. Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_c5e73d24-567d-4d89-8832-e19c0901d760/bin/uautomizer/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:04,769 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2019-10-22 08:57:04,769 INFO L160 nArgumentSynthesizer]: Using integer mode. [2019-10-22 08:57:04,774 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2019-10-22 08:57:04,776 INFO L210 LassoAnalysis]: Preferences: [2019-10-22 08:57:04,776 INFO L124 ssoRankerPreferences]: Compute integeral hull: false [2019-10-22 08:57:04,776 INFO L125 ssoRankerPreferences]: Enable LassoPartitioneer: true [2019-10-22 08:57:04,776 INFO L126 ssoRankerPreferences]: Term annotations enabled: false [2019-10-22 08:57:04,777 INFO L127 ssoRankerPreferences]: Use exernal solver: false [2019-10-22 08:57:04,777 INFO L128 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2019-10-22 08:57:04,777 INFO L129 ssoRankerPreferences]: Dump SMT script to file: false [2019-10-22 08:57:04,777 INFO L130 ssoRankerPreferences]: Path of dumped script: [2019-10-22 08:57:04,777 INFO L131 ssoRankerPreferences]: Filename of dumped script: rec_counter3.c_Iteration5_Loop [2019-10-22 08:57:04,777 INFO L132 ssoRankerPreferences]: MapElimAlgo: Frank [2019-10-22 08:57:04,777 INFO L274 LassoAnalysis]: Starting lasso preprocessing... [2019-10-22 08:57:04,777 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,783 INFO L141 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2019-10-22 08:57:04,796 INFO L292 LassoAnalysis]: Preprocessing complete. [2019-10-22 08:57:04,796 INFO L489 LassoAnalysis]: Using template 'affine'. [2019-10-22 08:57:04,796 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 [2019-10-22 08:57:04,797 INFO L337 nArgumentSynthesizer]: Template has degree 0. [2019-10-22 08:57:04,797 INFO L350 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2019-10-22 08:57:04,797 INFO L202 nArgumentSynthesizer]: 1 stem disjuncts [2019-10-22 08:57:04,797 INFO L203 nArgumentSynthesizer]: 1 loop disjuncts [2019-10-22 08:57:04,797 INFO L204 nArgumentSynthesizer]: 2 template conjuncts. [2019-10-22 08:57:04,798 INFO L400 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2019-10-22 08:57:04,798 INFO L401 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2019-10-22 08:57:04,800 INFO L419 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2019-10-22 08:57:04,801 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2019-10-22 08:57:04,801 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 1 variables to zero. [2019-10-22 08:57:04,802 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2019-10-22 08:57:04,802 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2019-10-22 08:57:04,802 INFO L510 LassoAnalysis]: Proved termination. [2019-10-22 08:57:04,802 INFO L512 LassoAnalysis]: Termination argument consisting of: Ranking function f(rec_~rescopy~0) = 1*rec_~rescopy~0 Supporting invariants [] [2019-10-22 08:57:04,802 INFO L297 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2019-10-22 08:57:04,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,826 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,827 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,845 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:04,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,851 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,852 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:04,852 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 1 loop predicates [2019-10-22 08:57:04,852 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-10-22 08:57:04,882 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 25 states and 29 transitions. Complement of second has 7 states. [2019-10-22 08:57:04,882 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 [2019-10-22 08:57:04,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 08:57:04,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-10-22 08:57:04,883 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 19 letters. Loop has 1 letters. [2019-10-22 08:57:04,883 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:04,883 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:57:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,911 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,912 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,927 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,932 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:04,933 INFO L152 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 1 loop predicates [2019-10-22 08:57:04,933 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-10-22 08:57:04,961 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 25 states and 29 transitions. Complement of second has 7 states. [2019-10-22 08:57:04,962 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 [2019-10-22 08:57:04,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 08:57:04,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 13 transitions. [2019-10-22 08:57:04,963 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 13 transitions. Stem has 19 letters. Loop has 1 letters. [2019-10-22 08:57:04,963 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:04,963 INFO L642 RefineBuchi]: Bad chosen interpolant automaton: word not accepted [2019-10-22 08:57:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:57:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:04,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-22 08:57:04,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:05,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-22 08:57:05,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:57:05,026 WARN L254 TraceCheckSpWp]: Trace formula consists of 5 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-22 08:57:05,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:57:05,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:57:05,027 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 1 loop predicates [2019-10-22 08:57:05,027 INFO L72 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5 Second operand 3 states. [2019-10-22 08:57:05,061 INFO L76 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 19 states and 22 transitions. cyclomatic complexity: 5. Second operand 3 states. Result 32 states and 40 transitions. Complement of second has 9 states. [2019-10-22 08:57:05,062 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 [2019-10-22 08:57:05,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2019-10-22 08:57:05,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 18 transitions. [2019-10-22 08:57:05,062 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 19 letters. Loop has 1 letters. [2019-10-22 08:57:05,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:05,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 20 letters. Loop has 1 letters. [2019-10-22 08:57:05,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:05,063 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 18 transitions. Stem has 19 letters. Loop has 2 letters. [2019-10-22 08:57:05,063 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2019-10-22 08:57:05,064 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 40 transitions. [2019-10-22 08:57:05,065 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:57:05,065 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 0 states and 0 transitions. [2019-10-22 08:57:05,065 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2019-10-22 08:57:05,065 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2019-10-22 08:57:05,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2019-10-22 08:57:05,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2019-10-22 08:57:05,065 INFO L688 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:05,065 INFO L711 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:05,066 INFO L591 BuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:57:05,066 INFO L424 BuchiCegarLoop]: ======== Iteration 6============ [2019-10-22 08:57:05,066 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:57:05,066 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2019-10-22 08:57:05,066 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2019-10-22 08:57:05,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 22.10 08:57:05 BoogieIcfgContainer [2019-10-22 08:57:05,072 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2019-10-22 08:57:05,072 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:57:05,072 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:57:05,072 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:57:05,073 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:57:02" (3/4) ... [2019-10-22 08:57:05,076 INFO L140 WitnessPrinter]: No result that supports witness generation found [2019-10-22 08:57:05,076 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:57:05,078 INFO L168 Benchmark]: Toolchain (without parser) took 3326.28 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 258.5 MB). Free memory was 949.9 MB in the beginning and 1.1 GB in the end (delta: -174.6 MB). Peak memory consumption was 83.9 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:05,079 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:05,079 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.8 MB). Free memory was 949.9 MB in the beginning and 1.2 GB in the end (delta: -224.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:05,079 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:05,080 INFO L168 Benchmark]: Boogie Preprocessor took 17.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:05,080 INFO L168 Benchmark]: RCFGBuilder took 186.59 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:05,081 INFO L168 Benchmark]: BuchiAutomizer took 2786.25 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 78.6 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 25.6 MB). Peak memory consumption was 104.2 MB. Max. memory is 11.5 GB. [2019-10-22 08:57:05,081 INFO L168 Benchmark]: Witness Printer took 4.31 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:57:05,083 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 967.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 301.10 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 179.8 MB). Free memory was 949.9 MB in the beginning and 1.2 GB in the end (delta: -224.8 MB). Peak memory consumption was 22.6 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 27.14 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 186.59 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: 18.0 MB). Peak memory consumption was 18.0 MB. Max. memory is 11.5 GB. * BuchiAutomizer took 2786.25 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 78.6 MB). Free memory was 1.2 GB in the beginning and 1.1 GB in the end (delta: 25.6 MB). Peak memory consumption was 104.2 MB. Max. memory is 11.5 GB. * Witness Printer took 4.31 ms. Allocated memory is still 1.3 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 6 terminating modules (3 trivial, 2 deterministic, 1 nondeterministic). One deterministic module has affine ranking function \old(a) and consists of 5 locations. One deterministic module has affine ranking function rescopy and consists of 4 locations. One nondeterministic module has affine ranking function rescopy and consists of 4 locations. 3 modules have a trivial ranking function, the largest among these consists of 8 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 2.7s and 6 iterations. TraceHistogramMax:3. Analysis of lassos took 1.7s. Construction of modules took 0.1s. Büchi inclusion checks took 0.6s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 5. Automata minimization 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had 29 states and ocurred in iteration 3. Nontrivial modules had stage [2, 0, 1, 0, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 0/0 HoareTripleCheckerStatistics: 102 SDtfs, 91 SDslu, 140 SDs, 0 SdLazy, 85 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT1 conc1 concLT1 SILN1 SILU0 SILI0 SILT0 lasso1 LassoPreprocessingBenchmarks: Lassos: inital11 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq169 hnf94 smp100 dnf124 smp100 tf108 neg97 sie113 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 225ms VariablesStem: 1 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 2 SupportingInvariants: 4 MotzkinApplications: 16 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 17 LassoNonterminationAnalysisSatUnbounded: 1 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 0 LassoNonterminationAnalysisTime: 0.2s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! Received shutdown request...