./Ultimate.py --spec ../../sv-benchmarks/c/properties/termination.prp --file ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for termination Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R --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 b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:21:30,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:21:30,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:21:30,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:21:30,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:21:30,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:21:30,354 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:21:30,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:21:30,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:21:30,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:21:30,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:21:30,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:21:30,361 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:21:30,363 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:21:30,364 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:21:30,365 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:21:30,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:21:30,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:21:30,369 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:21:30,371 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:21:30,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:21:30,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:21:30,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:21:30,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:21:30,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:21:30,380 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:21:30,380 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:21:30,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:21:30,382 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:21:30,383 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:21:30,383 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:21:30,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:21:30,385 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:21:30,386 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:21:30,387 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:21:30,387 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:21:30,388 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:21:30,388 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:21:30,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:21:30,389 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:21:30,390 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:21:30,393 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-25 18:21:30,423 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:21:30,424 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:21:30,425 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:21:30,425 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:21:30,426 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:21:30,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:21:30,427 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:21:30,427 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-25 18:21:30,427 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-25 18:21:30,428 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-25 18:21:30,429 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-25 18:21:30,429 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-25 18:21:30,429 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-25 18:21:30,430 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:21:30,430 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:21:30,430 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:21:30,430 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:21:30,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-25 18:21:30,431 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-25 18:21:30,431 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-25 18:21:30,431 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:21:30,431 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-25 18:21:30,432 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:21:30,432 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-25 18:21:30,432 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:21:30,432 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:21:30,433 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:21:30,433 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:21:30,435 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-25 18:21:30,435 INFO L138 SettingsManager]: * TransformationType=MODULO_NEIGHBOR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 [2022-11-25 18:21:30,748 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:21:30,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:21:30,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:21:30,793 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:21:30,793 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:21:30,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2022-11-25 18:21:33,876 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:21:34,096 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:21:34,097 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2022-11-25 18:21:34,105 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/data/b52f88ab7/81ad9b9a5673461f9460d8efe42aa111/FLAG0552b88aa [2022-11-25 18:21:34,129 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/data/b52f88ab7/81ad9b9a5673461f9460d8efe42aa111 [2022-11-25 18:21:34,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:21:34,137 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:21:34,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:21:34,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:21:34,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:21:34,145 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,146 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@250cb412 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34, skipping insertion in model container [2022-11-25 18:21:34,147 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,154 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:21:34,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:21:34,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:21:34,353 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:21:34,366 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:21:34,379 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:21:34,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34 WrapperNode [2022-11-25 18:21:34,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:21:34,382 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:21:34,382 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:21:34,383 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:21:34,391 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,414 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-11-25 18:21:34,414 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:21:34,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:21:34,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:21:34,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:21:34,425 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,427 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,431 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,431 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,432 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,433 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:21:34,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:21:34,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:21:34,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:21:34,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (1/1) ... [2022-11-25 18:21:34,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:34,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:34,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:34,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-25 18:21:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:21:34,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:21:34,539 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2022-11-25 18:21:34,540 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2022-11-25 18:21:34,601 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:21:34,603 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:21:34,711 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:21:34,719 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:21:34,719 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-25 18:21:34,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:34 BoogieIcfgContainer [2022-11-25 18:21:34,722 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:21:34,723 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-25 18:21:34,723 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-25 18:21:34,727 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-25 18:21:34,728 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-25 18:21:34,728 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 25.11 06:21:34" (1/3) ... [2022-11-25 18:21:34,730 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@75706426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 06:21:34, skipping insertion in model container [2022-11-25 18:21:34,730 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-25 18:21:34,731 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:21:34" (2/3) ... [2022-11-25 18:21:34,733 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@75706426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 25.11 06:21:34, skipping insertion in model container [2022-11-25 18:21:34,733 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-25 18:21:34,733 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:34" (3/3) ... [2022-11-25 18:21:34,735 INFO L332 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2022-11-25 18:21:34,796 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-25 18:21:34,796 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-25 18:21:34,796 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-25 18:21:34,796 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-25 18:21:34,796 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-25 18:21:34,797 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-25 18:21:34,797 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-25 18:21:34,797 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-25 18:21:34,801 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 18:21:34,824 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-25 18:21:34,824 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 18:21:34,824 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 18:21:34,831 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-25 18:21:34,831 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 18:21:34,831 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-25 18:21:34,832 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 18:21:34,835 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-25 18:21:34,835 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 18:21:34,835 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 18:21:34,836 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-25 18:21:34,836 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 18:21:34,844 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2#L16true call main_#t~ret3#1 := mc91(main_~x~0#1);< 6#mc91ENTRYtrue [2022-11-25 18:21:34,844 INFO L750 eck$LassoCheckResult]: Loop: 6#mc91ENTRYtrue ~n := #in~n; 10#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 6#mc91ENTRYtrue [2022-11-25 18:21:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:34,852 INFO L85 PathProgramCache]: Analyzing trace with hash 29870, now seen corresponding path program 1 times [2022-11-25 18:21:34,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:34,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670071334] [2022-11-25 18:21:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:34,941 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:34,976 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash 37870, now seen corresponding path program 1 times [2022-11-25 18:21:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:34,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297597334] [2022-11-25 18:21:34,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:34,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:35,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:35,012 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:35,024 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:35,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:35,026 INFO L85 PathProgramCache]: Analyzing trace with hash 889865249, now seen corresponding path program 1 times [2022-11-25 18:21:35,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:35,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319221854] [2022-11-25 18:21:35,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:35,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:35,046 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:35,057 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:35,223 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:21:35,224 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:21:35,224 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:21:35,224 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:21:35,224 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 18:21:35,225 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:35,225 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:21:35,225 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:21:35,225 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2022-11-25 18:21:35,225 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:21:35,225 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:21:35,257 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,291 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,298 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,301 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,308 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,366 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:21:35,367 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 18:21:35,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:35,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:35,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:35,381 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:21:35,381 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:21:35,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-25 18:21:35,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:35,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:35,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:35,431 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 18:21:35,432 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:21:35,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-25 18:21:35,475 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 18:21:35,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:35,484 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:21:35,485 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:21:35,485 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:21:35,485 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:21:35,485 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 18:21:35,485 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:35,485 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:21:35,486 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:21:35,486 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2022-11-25 18:21:35,486 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:21:35,486 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:21:35,487 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,500 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,503 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,509 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,515 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:35,590 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:21:35,594 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 18:21:35,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:35,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:35,599 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:35,610 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:21:35,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:21:35,625 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:21:35,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:21:35,625 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:21:35,626 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:21:35,630 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:21:35,630 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:21:35,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-25 18:21:35,654 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 18:21:35,661 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 18:21:35,661 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 18:21:35,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:35,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:35,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:35,740 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 18:21:35,740 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 18:21:35,741 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 18:21:35,741 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2022-11-25 18:21:35,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-25 18:21:35,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:35,754 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 18:21:35,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:21:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:35,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:21:35,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:35,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:35,948 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-25 18:21:35,950 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:36,043 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 32 states and 39 transitions. Complement of second has 12 states. [2022-11-25 18:21:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 18:21:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:21:36,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2022-11-25 18:21:36,052 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2022-11-25 18:21:36,054 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:21:36,054 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2022-11-25 18:21:36,054 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:21:36,054 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2022-11-25 18:21:36,055 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:21:36,055 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2022-11-25 18:21:36,061 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-25 18:21:36,072 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 19 states and 25 transitions. [2022-11-25 18:21:36,073 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2022-11-25 18:21:36,074 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2022-11-25 18:21:36,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2022-11-25 18:21:36,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 18:21:36,076 INFO L218 hiAutomatonCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-25 18:21:36,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2022-11-25 18:21:36,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-11-25 18:21:36,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:21:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-25 18:21:36,111 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 18:21:36,111 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-25 18:21:36,111 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-25 18:21:36,111 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2022-11-25 18:21:36,115 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-25 18:21:36,115 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 18:21:36,116 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 18:21:36,117 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:36,117 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:36,118 INFO L748 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 108#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 103#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 104#mc91ENTRY ~n := #in~n; 109#L10 assume !(~n > 100); 101#L11 call #t~ret0 := mc91(11 + ~n);< 102#mc91ENTRY ~n := #in~n; 110#L10 assume ~n > 100;#res := ~n - 10; 105#mc91FINAL assume true; 106#mc91EXIT >#20#return; 99#L11-1 [2022-11-25 18:21:36,118 INFO L750 eck$LassoCheckResult]: Loop: 99#L11-1 call #t~ret1 := mc91(#t~ret0);< 100#mc91ENTRY ~n := #in~n; 113#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 100#mc91ENTRY ~n := #in~n; 113#L10 assume ~n > 100;#res := ~n - 10; 112#mc91FINAL assume true; 114#mc91EXIT >#20#return; 99#L11-1 [2022-11-25 18:21:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:36,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1612519912, now seen corresponding path program 1 times [2022-11-25 18:21:36,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:36,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309016868] [2022-11-25 18:21:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:36,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:36,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:36,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:36,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 1 times [2022-11-25 18:21:36,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259094568] [2022-11-25 18:21:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:36,176 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:36,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1110240905, now seen corresponding path program 1 times [2022-11-25 18:21:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:36,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260611471] [2022-11-25 18:21:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:36,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:36,228 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:36,242 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:36,389 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:21:36,390 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:21:36,390 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:21:36,390 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:21:36,390 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 18:21:36,390 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:36,391 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:21:36,391 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:21:36,391 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2022-11-25 18:21:36,391 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:21:36,391 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:21:36,393 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:36,396 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:36,407 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:36,450 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:21:36,451 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 18:21:36,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:36,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:36,452 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:36,461 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:21:36,461 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:21:36,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-25 18:21:36,487 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 18:21:36,488 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 18:21:36,496 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:36,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:36,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:36,500 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:36,504 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:21:36,504 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:21:36,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-25 18:21:36,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:36,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:36,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:36,557 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:36,561 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 18:21:36,561 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:21:36,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-25 18:21:48,625 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2022-11-25 18:21:48,632 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2022-11-25 18:21:48,632 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:21:48,632 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:21:48,632 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:21:48,632 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:21:48,632 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 18:21:48,633 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:48,633 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:21:48,633 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:21:48,633 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2022-11-25 18:21:48,633 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:21:48,633 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:21:48,639 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:48,656 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:48,673 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:48,728 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:21:48,729 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 18:21:48,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:48,731 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:48,735 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:21:48,748 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:21:48,748 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:21:48,748 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:21:48,748 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:21:48,748 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:21:48,751 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:21:48,751 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:21:48,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-25 18:21:48,757 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 18:21:48,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:48,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:48,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:48,772 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:48,776 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:21:48,789 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:21:48,789 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:21:48,789 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:21:48,789 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:21:48,789 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:21:48,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-25 18:21:48,793 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:21:48,793 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:21:48,808 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 18:21:48,813 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 18:21:48,813 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 18:21:48,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:48,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:48,817 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:48,824 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 18:21:48,824 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 18:21:48,825 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 18:21:48,825 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2022-11-25 18:21:48,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-25 18:21:48,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:48,835 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 18:21:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:48,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:48,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:21:48,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:49,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:21:49,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:49,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:21:49,175 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-25 18:21:49,175 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:21:49,428 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 51 states and 73 transitions. Complement of second has 32 states. [2022-11-25 18:21:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2022-11-25 18:21:49,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:21:49,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2022-11-25 18:21:49,432 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2022-11-25 18:21:49,432 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:21:49,432 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2022-11-25 18:21:49,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:21:49,433 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2022-11-25 18:21:49,433 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:21:49,434 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2022-11-25 18:21:49,438 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-11-25 18:21:49,441 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2022-11-25 18:21:49,441 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-11-25 18:21:49,441 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2022-11-25 18:21:49,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2022-11-25 18:21:49,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 18:21:49,442 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 62 transitions. [2022-11-25 18:21:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2022-11-25 18:21:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-25 18:21:49,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-25 18:21:49,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2022-11-25 18:21:49,453 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-11-25 18:21:49,453 INFO L428 stractBuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-11-25 18:21:49,453 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-25 18:21:49,453 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2022-11-25 18:21:49,455 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-11-25 18:21:49,455 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 18:21:49,455 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 18:21:49,455 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:49,456 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-25 18:21:49,456 INFO L748 eck$LassoCheckResult]: Stem: 298#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 299#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 291#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 292#mc91ENTRY ~n := #in~n; 314#L10 assume !(~n > 100); 289#L11 call #t~ret0 := mc91(11 + ~n);< 290#mc91ENTRY ~n := #in~n; 302#L10 assume ~n > 100;#res := ~n - 10; 315#mc91FINAL assume true; 313#mc91EXIT >#20#return; 286#L11-1 call #t~ret1 := mc91(#t~ret0);< 309#mc91ENTRY ~n := #in~n; 317#L10 assume !(~n > 100); 283#L11 [2022-11-25 18:21:49,456 INFO L750 eck$LassoCheckResult]: Loop: 283#L11 call #t~ret0 := mc91(11 + ~n);< 284#mc91ENTRY ~n := #in~n; 300#L10 assume !(~n > 100); 283#L11 [2022-11-25 18:21:49,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:49,457 INFO L85 PathProgramCache]: Analyzing trace with hash -628486927, now seen corresponding path program 2 times [2022-11-25 18:21:49,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:49,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362979838] [2022-11-25 18:21:49,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:49,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:49,465 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:49,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:49,478 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:49,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash 48310, now seen corresponding path program 2 times [2022-11-25 18:21:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:49,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721635769] [2022-11-25 18:21:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:49,483 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:21:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:21:49,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:21:49,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:49,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1491580474, now seen corresponding path program 3 times [2022-11-25 18:21:49,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:49,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116353442] [2022-11-25 18:21:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:49,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:49,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:49,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 18:21:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 18:21:49,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:49,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116353442] [2022-11-25 18:21:49,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116353442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:21:49,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:21:49,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 18:21:49,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717031255] [2022-11-25 18:21:49,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:21:49,713 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:21:49,714 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:21:49,714 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:21:49,714 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:21:49,714 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 18:21:49,714 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:49,714 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:21:49,715 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:21:49,715 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2022-11-25 18:21:49,715 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:21:49,715 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:21:49,716 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:49,724 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:49,726 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:49,729 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:21:49,759 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:21:49,760 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 18:21:49,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:49,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:49,799 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:21:49,800 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:21:49,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-25 18:21:49,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:49,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:21:49,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:49,866 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:21:49,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-25 18:21:49,871 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 18:21:49,871 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:01,914 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2022-11-25 18:22:01,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:01,924 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:22:01,924 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:22:01,925 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:22:01,925 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:22:01,925 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 18:22:01,925 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:01,925 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:22:01,925 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:22:01,925 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2022-11-25 18:22:01,925 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:22:01,925 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:22:01,926 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:01,935 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:01,938 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:01,941 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:01,977 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:22:01,977 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 18:22:01,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:01,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:01,979 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:01,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-25 18:22:01,988 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:22:02,000 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:22:02,000 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:22:02,000 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:22:02,000 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:22:02,001 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:22:02,002 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:22:02,002 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:22:02,012 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 18:22:02,016 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 18:22:02,017 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 18:22:02,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:02,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:02,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:02,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-25 18:22:02,022 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 18:22:02,022 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 18:22:02,022 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 18:22:02,023 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2022-11-25 18:22:02,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:02,028 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 18:22:02,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:02,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:22:02,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:02,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:22:02,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:02,188 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 18:22:02,188 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,252 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 43 states and 59 transitions. Complement of second has 13 states. [2022-11-25 18:22:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:02,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2022-11-25 18:22:02,254 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2022-11-25 18:22:02,254 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:02,255 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:02,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:02,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:22:02,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:22:02,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:02,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:02,404 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 18:22:02,405 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,483 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 43 states and 59 transitions. Complement of second has 13 states. [2022-11-25 18:22:02,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2022-11-25 18:22:02,485 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2022-11-25 18:22:02,485 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:02,485 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:02,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:02,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:22:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:02,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:22:02,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:02,631 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-25 18:22:02,632 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,718 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 71 states and 100 transitions. Complement of second has 16 states. [2022-11-25 18:22:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:02,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2022-11-25 18:22:02,721 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2022-11-25 18:22:02,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:02,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2022-11-25 18:22:02,722 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:02,722 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2022-11-25 18:22:02,723 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:02,723 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2022-11-25 18:22:02,726 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2022-11-25 18:22:02,728 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2022-11-25 18:22:02,728 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-11-25 18:22:02,729 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2022-11-25 18:22:02,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2022-11-25 18:22:02,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 18:22:02,729 INFO L218 hiAutomatonCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-11-25 18:22:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2022-11-25 18:22:02,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-25 18:22:02,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-25 18:22:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-11-25 18:22:02,739 INFO L240 hiAutomatonCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-11-25 18:22:02,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:22:02,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:22:02,742 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-25 18:22:02,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:22:02,871 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-11-25 18:22:02,871 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2022-11-25 18:22:02,874 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-25 18:22:02,876 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2022-11-25 18:22:02,876 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2022-11-25 18:22:02,876 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2022-11-25 18:22:02,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2022-11-25 18:22:02,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 18:22:02,877 INFO L218 hiAutomatonCegarLoop]: Abstraction has 58 states and 75 transitions. [2022-11-25 18:22:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2022-11-25 18:22:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-25 18:22:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 37 states have internal predecessors, (37), 13 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-25 18:22:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-11-25 18:22:02,883 INFO L240 hiAutomatonCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-11-25 18:22:02,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:22:02,884 INFO L428 stractBuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-11-25 18:22:02,884 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-25 18:22:02,884 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2022-11-25 18:22:02,886 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-25 18:22:02,886 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 18:22:02,886 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 18:22:02,887 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 18:22:02,887 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2022-11-25 18:22:02,888 INFO L748 eck$LassoCheckResult]: Stem: 843#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 844#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 834#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 835#mc91ENTRY ~n := #in~n; 867#L10 assume !(~n > 100); 860#L11 call #t~ret0 := mc91(11 + ~n);< 862#mc91ENTRY ~n := #in~n; 865#L10 assume !(~n > 100); 859#L11 call #t~ret0 := mc91(11 + ~n);< 863#mc91ENTRY ~n := #in~n; 866#L10 assume ~n > 100;#res := ~n - 10; 864#mc91FINAL assume true; 861#mc91EXIT >#20#return; 846#L11-1 call #t~ret1 := mc91(#t~ret0);< 845#mc91ENTRY ~n := #in~n; 848#L10 assume ~n > 100;#res := ~n - 10; 854#mc91FINAL assume true; 881#mc91EXIT >#22#return; 855#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 838#L11-1 call #t~ret1 := mc91(#t~ret0);< 852#mc91ENTRY [2022-11-25 18:22:02,888 INFO L750 eck$LassoCheckResult]: Loop: 852#mc91ENTRY ~n := #in~n; 870#L10 assume !(~n > 100); 831#L11 call #t~ret0 := mc91(11 + ~n);< 832#mc91ENTRY ~n := #in~n; 849#L10 assume !(~n > 100); 830#L11 call #t~ret0 := mc91(11 + ~n);< 833#mc91ENTRY ~n := #in~n; 877#L10 assume ~n > 100;#res := ~n - 10; 875#mc91FINAL assume true; 873#mc91EXIT >#20#return; 827#L11-1 call #t~ret1 := mc91(#t~ret0);< 871#mc91ENTRY ~n := #in~n; 868#L10 assume ~n > 100;#res := ~n - 10; 869#mc91FINAL assume true; 880#mc91EXIT >#22#return; 855#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 837#L11-1 call #t~ret1 := mc91(#t~ret0);< 852#mc91ENTRY [2022-11-25 18:22:02,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:02,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1678623115, now seen corresponding path program 1 times [2022-11-25 18:22:02,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:02,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971447939] [2022-11-25 18:22:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:02,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:02,897 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:22:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:02,905 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:22:02,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:02,906 INFO L85 PathProgramCache]: Analyzing trace with hash -2037590184, now seen corresponding path program 1 times [2022-11-25 18:22:02,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:02,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637917866] [2022-11-25 18:22:02,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:02,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:02,913 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:22:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:02,920 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:22:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:02,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1698366862, now seen corresponding path program 2 times [2022-11-25 18:22:02,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:02,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468180072] [2022-11-25 18:22:02,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:02,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-25 18:22:03,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:22:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 18:22:03,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-25 18:22:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2022-11-25 18:22:03,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-25 18:22:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-25 18:22:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:22:03,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468180072] [2022-11-25 18:22:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468180072] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:22:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525457133] [2022-11-25 18:22:03,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:22:03,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:03,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:03,189 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:03,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:22:03,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:22:03,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:03,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:22:03,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:22:03,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-25 18:22:03,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525457133] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:22:03,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:22:03,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-11-25 18:22:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320318121] [2022-11-25 18:22:03,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:22:03,779 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:22:03,779 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:22:03,779 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:22:03,779 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:22:03,779 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 18:22:03,779 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:03,779 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:22:03,779 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:22:03,779 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2022-11-25 18:22:03,779 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:22:03,780 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:22:03,780 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:03,788 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:03,791 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:03,793 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:03,796 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:03,826 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:22:03,827 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 18:22:03,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:03,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:03,828 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:03,837 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:22:03,837 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:03,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-11-25 18:22:03,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:03,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:03,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:03,860 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:03,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-11-25 18:22:03,863 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 18:22:03,863 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:04,203 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 18:22:04,207 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-11-25 18:22:04,207 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:22:04,207 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:22:04,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:22:04,208 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:22:04,208 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 18:22:04,208 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:04,208 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:22:04,208 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:22:04,208 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2022-11-25 18:22:04,208 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:22:04,208 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:22:04,209 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:04,229 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:04,231 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:04,234 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:04,235 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:04,262 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:22:04,262 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 18:22:04,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:04,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:04,267 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:04,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-11-25 18:22:04,274 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:22:04,288 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:22:04,289 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:22:04,289 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:22:04,289 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:22:04,289 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:22:04,291 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:22:04,291 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:22:04,301 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 18:22:04,304 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 18:22:04,304 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 18:22:04,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:04,307 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:04,324 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 18:22:04,324 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 18:22:04,324 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 18:22:04,324 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2022-11-25 18:22:04,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-11-25 18:22:04,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:04,336 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 18:22:04,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:22:04,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:04,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:04,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:22:04,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:04,767 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:22:04,768 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-25 18:22:04,768 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 18:22:05,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:05,165 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Result 125 states and 150 transitions. Complement of second has 37 states. [2022-11-25 18:22:05,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:05,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 18:22:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 34 transitions. [2022-11-25 18:22:05,168 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2022-11-25 18:22:05,169 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:05,169 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:05,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:22:05,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:05,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:05,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:22:05,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:05,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-25 18:22:05,690 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2022-11-25 18:22:05,690 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 18:22:06,116 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Result 125 states and 150 transitions. Complement of second has 47 states. [2022-11-25 18:22:06,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:06,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-25 18:22:06,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2022-11-25 18:22:06,119 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2022-11-25 18:22:06,119 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:06,119 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:06,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:22:06,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:06,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:22:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 18:22:06,575 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-25 18:22:06,576 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 18:22:07,334 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Result 325 states and 417 transitions. Complement of second has 123 states. [2022-11-25 18:22:07,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 2 stem states 15 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:07,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-25 18:22:07,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 49 transitions. [2022-11-25 18:22:07,338 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2022-11-25 18:22:07,338 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:07,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2022-11-25 18:22:07,339 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:07,339 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2022-11-25 18:22:07,343 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:07,343 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 325 states and 417 transitions. [2022-11-25 18:22:07,349 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 25 [2022-11-25 18:22:07,357 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 325 states to 169 states and 230 transitions. [2022-11-25 18:22:07,359 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2022-11-25 18:22:07,360 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2022-11-25 18:22:07,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 230 transitions. [2022-11-25 18:22:07,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 18:22:07,362 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 230 transitions. [2022-11-25 18:22:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 230 transitions. [2022-11-25 18:22:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2022-11-25 18:22:07,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 88 states have internal predecessors, (93), 32 states have call successors, (42), 26 states have call predecessors, (42), 22 states have return successors, (43), 25 states have call predecessors, (43), 28 states have call successors, (43) [2022-11-25 18:22:07,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2022-11-25 18:22:07,382 INFO L240 hiAutomatonCegarLoop]: Abstraction has 140 states and 178 transitions. [2022-11-25 18:22:07,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:22:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:22:07,384 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-25 18:22:07,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:22:07,650 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-11-25 18:22:07,650 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138 states and 163 transitions. [2022-11-25 18:22:07,653 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-25 18:22:07,655 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138 states to 101 states and 121 transitions. [2022-11-25 18:22:07,655 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2022-11-25 18:22:07,655 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2022-11-25 18:22:07,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 121 transitions. [2022-11-25 18:22:07,656 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-25 18:22:07,656 INFO L218 hiAutomatonCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-11-25 18:22:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states and 121 transitions. [2022-11-25 18:22:07,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-11-25 18:22:07,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 22 states have call successors, (29), 19 states have call predecessors, (29), 15 states have return successors, (25), 16 states have call predecessors, (25), 18 states have call successors, (25) [2022-11-25 18:22:07,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2022-11-25 18:22:07,675 INFO L240 hiAutomatonCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-11-25 18:22:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:22:07,677 INFO L428 stractBuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-11-25 18:22:07,677 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-25 18:22:07,677 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 117 transitions. [2022-11-25 18:22:07,678 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-25 18:22:07,679 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-25 18:22:07,679 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-25 18:22:07,680 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-25 18:22:07,681 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:07,681 INFO L748 eck$LassoCheckResult]: Stem: 2755#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2756#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2741#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 2742#mc91ENTRY ~n := #in~n; 2779#L10 assume !(~n > 100); 2780#L11 call #t~ret0 := mc91(11 + ~n);< 2781#mc91ENTRY ~n := #in~n; 2783#L10 assume !(~n > 100); 2782#L11 call #t~ret0 := mc91(11 + ~n);< 2799#mc91ENTRY ~n := #in~n; 2801#L10 assume ~n > 100;#res := ~n - 10; 2800#mc91FINAL assume true; 2798#mc91EXIT >#20#return; 2795#L11-1 call #t~ret1 := mc91(#t~ret0);< 2797#mc91ENTRY ~n := #in~n; 2803#L10 assume ~n > 100;#res := ~n - 10; 2802#mc91FINAL assume true; 2794#mc91EXIT >#22#return; 2792#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2790#mc91FINAL assume true; 2789#mc91EXIT >#20#return; 2785#L11-1 call #t~ret1 := mc91(#t~ret0);< 2788#mc91ENTRY ~n := #in~n; 2786#L10 assume !(~n > 100); 2747#L11 call #t~ret0 := mc91(11 + ~n);< 2757#mc91ENTRY ~n := #in~n; 2758#L10 assume ~n > 100;#res := ~n - 10; 2750#mc91FINAL assume true; 2751#mc91EXIT >#20#return; 2771#L11-1 call #t~ret1 := mc91(#t~ret0);< 2813#mc91ENTRY ~n := #in~n; 2828#L10 assume !(~n > 100); 2826#L11 call #t~ret0 := mc91(11 + ~n);< 2745#mc91ENTRY ~n := #in~n; 2831#L10 assume ~n > 100;#res := ~n - 10; 2830#mc91FINAL assume true; 2825#mc91EXIT >#20#return; 2764#L11-1 call #t~ret1 := mc91(#t~ret0);< 2821#mc91ENTRY [2022-11-25 18:22:07,681 INFO L750 eck$LassoCheckResult]: Loop: 2821#mc91ENTRY ~n := #in~n; 2832#L10 assume !(~n > 100); 2827#L11 call #t~ret0 := mc91(11 + ~n);< 2745#mc91ENTRY ~n := #in~n; 2831#L10 assume ~n > 100;#res := ~n - 10; 2830#mc91FINAL assume true; 2825#mc91EXIT >#20#return; 2765#L11-1 call #t~ret1 := mc91(#t~ret0);< 2821#mc91ENTRY [2022-11-25 18:22:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:07,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1106586231, now seen corresponding path program 3 times [2022-11-25 18:22:07,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:07,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347679930] [2022-11-25 18:22:07,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:07,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:07,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:07,694 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:22:07,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:07,704 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:22:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1861921664, now seen corresponding path program 2 times [2022-11-25 18:22:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:07,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033182027] [2022-11-25 18:22:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:07,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:07,709 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:22:07,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:07,712 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:22:07,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:07,713 INFO L85 PathProgramCache]: Analyzing trace with hash 935033096, now seen corresponding path program 4 times [2022-11-25 18:22:07,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:07,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020639608] [2022-11-25 18:22:07,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:07,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:07,733 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:22:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:22:07,757 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:22:07,860 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:22:07,860 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:22:07,860 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:22:07,860 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:22:07,861 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-25 18:22:07,861 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:07,861 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:22:07,861 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:22:07,861 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2022-11-25 18:22:07,861 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:22:07,861 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:22:07,862 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:07,865 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:07,867 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:07,874 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:07,877 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:07,911 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:22:07,913 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-25 18:22:07,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:07,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:07,915 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:07,924 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:22:07,924 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:07,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-11-25 18:22:07,955 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 18:22:07,955 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 18:22:07,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:07,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:07,965 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:07,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-11-25 18:22:07,972 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:22:07,974 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:08,001 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-25 18:22:08,001 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-25 18:22:08,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:08,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:08,009 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:08,015 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-25 18:22:08,015 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:08,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-11-25 18:22:08,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:08,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:08,052 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:08,056 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-25 18:22:08,056 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-25 18:22:08,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-11-25 18:22:08,095 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-25 18:22:08,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:08,106 INFO L210 LassoAnalysis]: Preferences: [2022-11-25 18:22:08,106 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-25 18:22:08,106 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-25 18:22:08,106 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-25 18:22:08,106 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-25 18:22:08,106 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,106 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-25 18:22:08,106 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-25 18:22:08,106 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2022-11-25 18:22:08,106 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-25 18:22:08,107 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-25 18:22:08,107 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:08,110 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:08,112 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:08,119 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:08,122 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-25 18:22:08,160 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-25 18:22:08,160 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-25 18:22:08,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:08,173 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:08,177 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:22:08,190 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:22:08,190 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:22:08,190 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:22:08,190 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:22:08,190 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:22:08,192 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:22:08,192 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:22:08,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-11-25 18:22:08,202 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 18:22:08,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2022-11-25 18:22:08,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:08,206 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:08,210 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:22:08,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-11-25 18:22:08,222 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:22:08,222 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:22:08,222 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:22:08,222 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:22:08,222 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:22:08,223 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:22:08,223 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:22:08,226 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-25 18:22:08,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:08,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:08,231 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:08,239 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-25 18:22:08,251 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-25 18:22:08,251 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-25 18:22:08,252 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-25 18:22:08,252 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-25 18:22:08,252 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-25 18:22:08,253 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-25 18:22:08,253 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-25 18:22:08,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-11-25 18:22:08,270 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-25 18:22:08,273 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-25 18:22:08,274 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-25 18:22:08,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-25 18:22:08,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:08,275 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-25 18:22:08,281 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-25 18:22:08,281 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-25 18:22:08,281 INFO L513 LassoAnalysis]: Proved termination. [2022-11-25 18:22:08,281 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 201 Supporting invariants [] [2022-11-25 18:22:08,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-11-25 18:22:08,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:08,287 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-25 18:22:08,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:08,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:08,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:22:08,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:08,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:22:08,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:08,834 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-25 18:22:08,834 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:08,945 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 107 states and 127 transitions. Complement of second has 12 states. [2022-11-25 18:22:08,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:08,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2022-11-25 18:22:08,946 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-25 18:22:08,947 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:08,947 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:08,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:22:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:09,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:22:09,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:09,354 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-25 18:22:09,354 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:09,605 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 125 states and 146 transitions. Complement of second has 24 states. [2022-11-25 18:22:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:09,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2022-11-25 18:22:09,608 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-25 18:22:09,608 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:09,608 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:09,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:09,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:22:09,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:09,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:22:09,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:10,032 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-25 18:22:10,032 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:10,129 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 147 states and 167 transitions. Complement of second has 13 states. [2022-11-25 18:22:10,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:10,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-25 18:22:10,131 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-25 18:22:10,131 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:10,131 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-25 18:22:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:10,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:22:10,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:10,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:22:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:22:10,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:22:10,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:22:10,560 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-25 18:22:10,561 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:10,903 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 182 states and 209 transitions. Complement of second has 48 states. [2022-11-25 18:22:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2022-11-25 18:22:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-25 18:22:10,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 27 transitions. [2022-11-25 18:22:10,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-25 18:22:10,905 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:10,905 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 46 letters. Loop has 8 letters. [2022-11-25 18:22:10,906 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:10,906 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 16 letters. [2022-11-25 18:22:10,907 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-25 18:22:10,907 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 209 transitions. [2022-11-25 18:22:10,909 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-25 18:22:10,909 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 0 states and 0 transitions. [2022-11-25 18:22:10,909 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-25 18:22:10,909 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-25 18:22:10,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-25 18:22:10,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:22:10,910 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 18:22:10,910 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 18:22:10,910 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-25 18:22:10,910 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-11-25 18:22:10,910 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-25 18:22:10,910 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-25 18:22:10,910 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-25 18:22:10,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 25.11 06:22:10 BoogieIcfgContainer [2022-11-25 18:22:10,918 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-25 18:22:10,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:22:10,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:22:10,919 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:22:10,919 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:21:34" (3/4) ... [2022-11-25 18:22:10,922 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 18:22:10,922 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:22:10,923 INFO L158 Benchmark]: Toolchain (without parser) took 36786.09ms. Allocated memory was 146.8MB in the beginning and 201.3MB in the end (delta: 54.5MB). Free memory was 101.7MB in the beginning and 139.9MB in the end (delta: -38.2MB). Peak memory consumption was 17.0MB. Max. memory is 16.1GB. [2022-11-25 18:22:10,923 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 146.8MB. Free memory is still 117.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:22:10,923 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.00ms. Allocated memory is still 146.8MB. Free memory was 101.7MB in the beginning and 92.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 18:22:10,924 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.86ms. Allocated memory is still 146.8MB. Free memory was 92.6MB in the beginning and 91.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:22:10,924 INFO L158 Benchmark]: Boogie Preprocessor took 18.41ms. Allocated memory is still 146.8MB. Free memory was 91.2MB in the beginning and 90.5MB in the end (delta: 670.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:22:10,925 INFO L158 Benchmark]: RCFGBuilder took 286.32ms. Allocated memory is still 146.8MB. Free memory was 90.5MB in the beginning and 81.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-25 18:22:10,925 INFO L158 Benchmark]: BuchiAutomizer took 36194.77ms. Allocated memory was 146.8MB in the beginning and 201.3MB in the end (delta: 54.5MB). Free memory was 81.7MB in the beginning and 139.9MB in the end (delta: -58.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:22:10,925 INFO L158 Benchmark]: Witness Printer took 3.94ms. Allocated memory is still 201.3MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:22:10,927 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 146.8MB. Free memory is still 117.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 241.00ms. Allocated memory is still 146.8MB. Free memory was 101.7MB in the beginning and 92.6MB in the end (delta: 9.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.86ms. Allocated memory is still 146.8MB. Free memory was 92.6MB in the beginning and 91.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.41ms. Allocated memory is still 146.8MB. Free memory was 91.2MB in the beginning and 90.5MB in the end (delta: 670.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 286.32ms. Allocated memory is still 146.8MB. Free memory was 90.5MB in the beginning and 81.7MB in the end (delta: 8.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 36194.77ms. Allocated memory was 146.8MB in the beginning and 201.3MB in the end (delta: 54.5MB). Free memory was 81.7MB in the beginning and 139.9MB in the end (delta: -58.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.94ms. Allocated memory is still 201.3MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function 211 + -2 * \old(n) and consists of 4 locations. One deterministic module has affine ranking function 201 + -2 * aux-mc91(n+11)-aux and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function 90 + -1 * \old(n) and consists of 18 locations. One nondeterministic module has affine ranking function -2 * \old(n) + 201 and consists of 11 locations. 2 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 36.1s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 28.2s. Construction of modules took 0.8s. Büchi inclusion checks took 6.8s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 48 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 305 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 289 mSDsluCounter, 382 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 202 mSDsCounter, 225 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 901 IncrementalHoareTripleChecker+Invalid, 1126 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 225 mSolverCounterUnsat, 180 mSDtfsCounter, 901 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown LassoAnalysisResults: nont0 unkn0 SFLI0 SFLT3 conc0 concLT2 SILN0 SILU0 SILI0 SILT0 lasso0 LassoPreprocessingBenchmarks: Lassos: inital14 mio100 ax100 hnf100 lsp100 ukn100 mio100 lsp100 div100 bol100 ite100 ukn100 eq156 hnf93 smp100 dnf100 smp100 tf109 neg95 sie105 LassoTerminationAnalysisBenchmarks: ConstraintsSatisfiability: sat Degree: 0 Time: 146ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 24.9s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-25 18:22:10,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:11,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_622a8722-1b11-4817-9771-5b0b07859bd0/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE