./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 2329fc70 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_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8 --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-2329fc7 [2022-12-13 14:11:11,528 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 14:11:11,530 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 14:11:11,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 14:11:11,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 14:11:11,545 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 14:11:11,546 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 14:11:11,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 14:11:11,548 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 14:11:11,549 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 14:11:11,549 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 14:11:11,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 14:11:11,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 14:11:11,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 14:11:11,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 14:11:11,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 14:11:11,553 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 14:11:11,554 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 14:11:11,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 14:11:11,556 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 14:11:11,557 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 14:11:11,558 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 14:11:11,559 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 14:11:11,559 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 14:11:11,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 14:11:11,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 14:11:11,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 14:11:11,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 14:11:11,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 14:11:11,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 14:11:11,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 14:11:11,564 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 14:11:11,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 14:11:11,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 14:11:11,566 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 14:11:11,566 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 14:11:11,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 14:11:11,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 14:11:11,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 14:11:11,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 14:11:11,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 14:11:11,569 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-12-13 14:11:11,584 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 14:11:11,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 14:11:11,584 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 14:11:11,584 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 14:11:11,585 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 14:11:11,585 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 14:11:11,585 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 14:11:11,585 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * Use old map elimination=false [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-12-13 14:11:11,586 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 14:11:11,586 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 14:11:11,587 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-12-13 14:11:11,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 14:11:11,588 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 14:11:11,588 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 14:11:11,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 14:11:11,589 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-12-13 14:11:11,589 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_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 [2022-12-13 14:11:11,771 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 14:11:11,787 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 14:11:11,789 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 14:11:11,790 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 14:11:11,790 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 14:11:11,791 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2022-12-13 14:11:14,288 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 14:11:14,441 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 14:11:14,442 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2022-12-13 14:11:14,446 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/data/9ddccd096/01d7e68d8aaf4892abc3e608113fd1e0/FLAG9eff72928 [2022-12-13 14:11:14,850 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/data/9ddccd096/01d7e68d8aaf4892abc3e608113fd1e0 [2022-12-13 14:11:14,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 14:11:14,853 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 14:11:14,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 14:11:14,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 14:11:14,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 14:11:14,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:14,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34b50e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14, skipping insertion in model container [2022-12-13 14:11:14,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:14,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 14:11:14,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 14:11:14,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:11:14,964 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 14:11:14,972 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 14:11:14,982 INFO L208 MainTranslator]: Completed translation [2022-12-13 14:11:14,982 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14 WrapperNode [2022-12-13 14:11:14,982 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 14:11:14,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 14:11:14,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 14:11:14,983 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 14:11:14,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:14,993 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,004 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-12-13 14:11:15,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 14:11:15,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 14:11:15,005 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 14:11:15,005 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 14:11:15,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,012 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,013 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,015 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,015 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 14:11:15,017 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 14:11:15,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 14:11:15,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 14:11:15,018 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (1/1) ... [2022-12-13 14:11:15,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:15,042 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:15,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-12-13 14:11:15,078 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 14:11:15,078 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 14:11:15,079 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2022-12-13 14:11:15,079 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2022-12-13 14:11:15,126 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 14:11:15,127 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 14:11:15,178 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 14:11:15,184 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 14:11:15,184 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 14:11:15,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:11:15 BoogieIcfgContainer [2022-12-13 14:11:15,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 14:11:15,186 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-12-13 14:11:15,186 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-12-13 14:11:15,189 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-12-13 14:11:15,189 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-12-13 14:11:15,189 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 13.12 02:11:14" (1/3) ... [2022-12-13 14:11:15,190 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6303d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.12 02:11:15, skipping insertion in model container [2022-12-13 14:11:15,190 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-12-13 14:11:15,190 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 02:11:14" (2/3) ... [2022-12-13 14:11:15,191 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@6303d4aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 13.12 02:11:15, skipping insertion in model container [2022-12-13 14:11:15,191 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-12-13 14:11:15,191 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:11:15" (3/3) ... [2022-12-13 14:11:15,192 INFO L332 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2022-12-13 14:11:15,233 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-12-13 14:11:15,234 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-12-13 14:11:15,234 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-12-13 14:11:15,234 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-12-13 14:11:15,234 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-12-13 14:11:15,234 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-12-13 14:11:15,234 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-12-13 14:11:15,234 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-12-13 14:11:15,238 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) [2022-12-13 14:11:15,253 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-12-13 14:11:15,253 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 14:11:15,254 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 14:11:15,258 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-12-13 14:11:15,259 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-12-13 14:11:15,259 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-12-13 14:11:15,259 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) [2022-12-13 14:11:15,260 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-12-13 14:11:15,260 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 14:11:15,260 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 14:11:15,260 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-12-13 14:11:15,261 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-12-13 14:11:15,266 INFO L748 eck$LassoCheckResult]: Stem: 12#$Ultimate##0true assume { :begin_inline_ULTIMATE.init } true; 5#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2#L16true call main_#t~ret3#1 := mc91(main_~x~0#1);< 11#$Ultimate##0true [2022-12-13 14:11:15,267 INFO L750 eck$LassoCheckResult]: Loop: 11#$Ultimate##0true ~n := #in~n; 8#L10true assume !(~n > 100); 9#L11true call #t~ret0 := mc91(11 + ~n);< 11#$Ultimate##0true [2022-12-13 14:11:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,271 INFO L85 PathProgramCache]: Analyzing trace with hash 29870, now seen corresponding path program 1 times [2022-12-13 14:11:15,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:15,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500219857] [2022-12-13 14:11:15,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:15,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,330 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:15,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,348 INFO L85 PathProgramCache]: Analyzing trace with hash 37870, now seen corresponding path program 1 times [2022-12-13 14:11:15,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:15,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048609700] [2022-12-13 14:11:15,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:15,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,358 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:15,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,362 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:15,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,363 INFO L85 PathProgramCache]: Analyzing trace with hash 889865249, now seen corresponding path program 1 times [2022-12-13 14:11:15,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:15,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659913642] [2022-12-13 14:11:15,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:15,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:15,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,368 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,373 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:15,451 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:15,451 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:15,451 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:15,451 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:15,451 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-12-13 14:11:15,451 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,452 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:15,452 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:15,452 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2022-12-13 14:11:15,452 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:15,452 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:15,463 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,477 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,480 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,483 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,486 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,530 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:15,531 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-12-13 14:11:15,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:15,534 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:15,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-12-13 14:11:15,536 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:15,536 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:15,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:15,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:15,555 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:15,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-12-13 14:11:15,557 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-12-13 14:11:15,557 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:15,582 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-12-13 14:11:15,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Ended with exit code 0 [2022-12-13 14:11:15,585 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:15,585 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:15,586 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:15,586 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:15,586 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-12-13 14:11:15,586 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,586 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:15,586 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:15,586 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2022-12-13 14:11:15,586 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:15,586 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:15,588 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,596 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,598 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,600 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,603 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:15,629 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:15,633 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-12-13 14:11:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:15,635 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:15,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-12-13 14:11:15,637 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 [2022-12-13 14:11:15,647 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:15,647 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:15,648 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:15,648 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:15,648 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:15,650 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:15,651 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:15,653 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-12-13 14:11:15,661 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-12-13 14:11:15,661 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-12-13 14:11:15,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:15,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:15,683 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:15,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-12-13 14:11:15,685 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-12-13 14:11:15,685 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-12-13 14:11:15,685 INFO L513 LassoAnalysis]: Proved termination. [2022-12-13 14:11:15,686 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2022-12-13 14:11:15,689 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Ended with exit code 0 [2022-12-13 14:11:15,693 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-12-13 14:11:15,717 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Ended with exit code 0 [2022-12-13 14:11:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:15,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-12-13 14:11:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:15,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:11:15,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:15,824 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 [2022-12-13 14:11:15,825 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) [2022-12-13 14:11:15,895 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. [2022-12-13 14:11:15,897 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 [2022-12-13 14:11:15,900 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) [2022-12-13 14:11:15,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2022-12-13 14:11:15,901 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2022-12-13 14:11:15,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:15,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2022-12-13 14:11:15,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:15,902 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2022-12-13 14:11:15,902 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:15,903 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2022-12-13 14:11:15,904 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-12-13 14:11:15,908 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 19 states and 25 transitions. [2022-12-13 14:11:15,908 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2022-12-13 14:11:15,909 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2022-12-13 14:11:15,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2022-12-13 14:11:15,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-12-13 14:11:15,910 INFO L218 hiAutomatonCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-12-13 14:11:15,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2022-12-13 14:11:15,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-12-13 14:11:15,927 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) [2022-12-13 14:11:15,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-13 14:11:15,928 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-13 14:11:15,928 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-13 14:11:15,928 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-12-13 14:11:15,928 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2022-12-13 14:11:15,929 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-12-13 14:11:15,929 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 14:11:15,929 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 14:11:15,929 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:15,929 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:15,929 INFO L748 eck$LassoCheckResult]: Stem: 109#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 110#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 102#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 104#$Ultimate##0 ~n := #in~n; 107#L10 assume !(~n > 100); 101#L11 call #t~ret0 := mc91(11 + ~n);< 103#$Ultimate##0 ~n := #in~n; 108#L10 assume ~n > 100;#res := ~n - 10; 105#mc91FINAL assume true; 106#mc91EXIT >#20#return; 99#L11-1 [2022-12-13 14:11:15,930 INFO L750 eck$LassoCheckResult]: Loop: 99#L11-1 call #t~ret1 := mc91(#t~ret0);< 100#$Ultimate##0 ~n := #in~n; 113#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 100#$Ultimate##0 ~n := #in~n; 113#L10 assume ~n > 100;#res := ~n - 10; 112#mc91FINAL assume true; 114#mc91EXIT >#20#return; 99#L11-1 [2022-12-13 14:11:15,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1612519912, now seen corresponding path program 1 times [2022-12-13 14:11:15,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:15,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477468585] [2022-12-13 14:11:15,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:15,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,935 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,940 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:15,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,940 INFO L85 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 1 times [2022-12-13 14:11:15,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:15,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583228283] [2022-12-13 14:11:15,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:15,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:15,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,945 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:15,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:15,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1110240905, now seen corresponding path program 1 times [2022-12-13 14:11:15,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:15,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509536470] [2022-12-13 14:11:15,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:15,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:15,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:16,067 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:16,067 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:16,067 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:16,067 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:16,067 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-12-13 14:11:16,067 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:16,067 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:16,067 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:16,067 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2022-12-13 14:11:16,067 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:16,068 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:16,068 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:16,071 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:16,078 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:16,103 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:16,103 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-12-13 14:11:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:16,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:16,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:16,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-12-13 14:11:16,106 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:16,106 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:16,119 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-12-13 14:11:16,119 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-12-13 14:11:16,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Ended with exit code 0 [2022-12-13 14:11:16,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:16,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:16,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:16,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-12-13 14:11:16,125 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:16,126 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:16,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Ended with exit code 0 [2022-12-13 14:11:16,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:16,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:16,158 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:16,158 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-12-13 14:11:16,160 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-12-13 14:11:16,160 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:28,410 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2022-12-13 14:11:28,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Ended with exit code 0 [2022-12-13 14:11:28,425 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:28,425 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:28,426 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:28,426 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:28,426 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-12-13 14:11:28,426 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:28,426 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:28,426 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:28,426 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2022-12-13 14:11:28,426 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:28,426 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:28,428 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:28,430 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:28,439 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:28,466 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:28,466 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-12-13 14:11:28,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:28,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:28,467 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:28,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-12-13 14:11:28,470 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 [2022-12-13 14:11:28,480 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:28,480 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:28,480 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:28,480 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:28,480 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:28,481 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:28,481 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:28,482 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-12-13 14:11:28,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Ended with exit code 0 [2022-12-13 14:11:28,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:28,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:28,486 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:28,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-12-13 14:11:28,488 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 [2022-12-13 14:11:28,498 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:28,499 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:28,499 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:28,499 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:28,499 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:28,500 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:28,501 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:28,503 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-12-13 14:11:28,506 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-12-13 14:11:28,506 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-12-13 14:11:28,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:28,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:28,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:28,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-12-13 14:11:28,509 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-12-13 14:11:28,509 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-12-13 14:11:28,509 INFO L513 LassoAnalysis]: Proved termination. [2022-12-13 14:11:28,509 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2022-12-13 14:11:28,512 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Ended with exit code 0 [2022-12-13 14:11:28,513 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-12-13 14:11:28,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:28,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 14:11:28,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:28,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:11:28,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:28,697 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 [2022-12-13 14:11:28,697 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) [2022-12-13 14:11:28,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:28,846 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. [2022-12-13 14:11:28,847 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 [2022-12-13 14:11:28,847 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) [2022-12-13 14:11:28,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2022-12-13 14:11:28,848 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2022-12-13 14:11:28,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:28,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2022-12-13 14:11:28,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:28,849 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2022-12-13 14:11:28,849 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:28,849 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2022-12-13 14:11:28,853 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-12-13 14:11:28,856 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2022-12-13 14:11:28,856 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-12-13 14:11:28,856 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2022-12-13 14:11:28,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2022-12-13 14:11:28,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-12-13 14:11:28,857 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 62 transitions. [2022-12-13 14:11:28,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2022-12-13 14:11:28,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-12-13 14:11:28,862 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) [2022-12-13 14:11:28,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2022-12-13 14:11:28,863 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-12-13 14:11:28,863 INFO L428 stractBuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-12-13 14:11:28,863 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-12-13 14:11:28,863 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2022-12-13 14:11:28,865 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-12-13 14:11:28,865 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 14:11:28,865 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 14:11:28,865 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:28,865 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-12-13 14:11:28,866 INFO L748 eck$LassoCheckResult]: Stem: 301#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 302#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; 289#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 291#$Ultimate##0 ~n := #in~n; 310#L10 assume !(~n > 100); 288#L11 call #t~ret0 := mc91(11 + ~n);< 290#$Ultimate##0 ~n := #in~n; 300#L10 assume ~n > 100;#res := ~n - 10; 316#mc91FINAL assume true; 314#mc91EXIT >#20#return; 286#L11-1 call #t~ret1 := mc91(#t~ret0);< 309#$Ultimate##0 ~n := #in~n; 318#L10 assume !(~n > 100); 283#L11 [2022-12-13 14:11:28,866 INFO L750 eck$LassoCheckResult]: Loop: 283#L11 call #t~ret0 := mc91(11 + ~n);< 284#$Ultimate##0 ~n := #in~n; 297#L10 assume !(~n > 100); 283#L11 [2022-12-13 14:11:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash -628486927, now seen corresponding path program 2 times [2022-12-13 14:11:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:28,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079667943] [2022-12-13 14:11:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:28,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:28,874 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:28,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:28,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:28,882 INFO L85 PathProgramCache]: Analyzing trace with hash 48310, now seen corresponding path program 2 times [2022-12-13 14:11:28,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:28,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73649520] [2022-12-13 14:11:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:28,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:28,886 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:28,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:28,889 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:28,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:28,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1491580474, now seen corresponding path program 3 times [2022-12-13 14:11:28,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:28,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784788504] [2022-12-13 14:11:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:28,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:28,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 14:11:28,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 14:11:29,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:29,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784788504] [2022-12-13 14:11:29,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784788504] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 14:11:29,009 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 14:11:29,009 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 14:11:29,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229155771] [2022-12-13 14:11:29,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 14:11:29,042 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:29,042 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:29,042 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:29,042 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:29,042 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-12-13 14:11:29,042 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:29,043 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:29,043 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:29,043 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2022-12-13 14:11:29,043 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:29,043 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:29,044 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:29,049 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:29,051 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:29,053 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:29,073 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:29,073 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-12-13 14:11:29,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:29,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:29,074 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:29,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-12-13 14:11:29,077 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:29,077 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:29,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Ended with exit code 0 [2022-12-13 14:11:29,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:29,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:29,102 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:29,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-12-13 14:11:29,104 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-12-13 14:11:29,104 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:41,127 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2022-12-13 14:11:41,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:41,132 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:41,133 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:41,133 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:41,133 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:41,133 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-12-13 14:11:41,133 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:41,133 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:41,133 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:41,133 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2022-12-13 14:11:41,133 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:41,133 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:41,134 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:41,139 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:41,140 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:41,142 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:41,160 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:41,160 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-12-13 14:11:41,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:41,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:41,161 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:41,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-12-13 14:11:41,163 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 [2022-12-13 14:11:41,173 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:41,174 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:41,174 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:41,174 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:41,174 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:41,175 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:41,175 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:41,177 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-12-13 14:11:41,180 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-12-13 14:11:41,180 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-12-13 14:11:41,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:41,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:41,181 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:41,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-12-13 14:11:41,183 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-12-13 14:11:41,183 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-12-13 14:11:41,183 INFO L513 LassoAnalysis]: Proved termination. [2022-12-13 14:11:41,183 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2022-12-13 14:11:41,186 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Ended with exit code 0 [2022-12-13 14:11:41,186 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-12-13 14:11:41,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:41,274 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 [2022-12-13 14:11:41,274 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) [2022-12-13 14:11:41,320 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. [2022-12-13 14:11:41,320 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 [2022-12-13 14:11:41,321 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) [2022-12-13 14:11:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2022-12-13 14:11:41,322 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2022-12-13 14:11:41,322 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:41,322 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:41,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:41,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:41,414 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 [2022-12-13 14:11:41,414 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) [2022-12-13 14:11:41,459 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. [2022-12-13 14:11:41,460 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 [2022-12-13 14:11:41,460 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) [2022-12-13 14:11:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2022-12-13 14:11:41,461 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2022-12-13 14:11:41,461 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:41,461 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:41,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:41,488 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Ended with exit code 0 [2022-12-13 14:11:41,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:41,559 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 [2022-12-13 14:11:41,559 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) [2022-12-13 14:11:41,610 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. [2022-12-13 14:11:41,610 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 [2022-12-13 14:11:41,610 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) [2022-12-13 14:11:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2022-12-13 14:11:41,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2022-12-13 14:11:41,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:41,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2022-12-13 14:11:41,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:41,611 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2022-12-13 14:11:41,611 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:41,611 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2022-12-13 14:11:41,614 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2022-12-13 14:11:41,615 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2022-12-13 14:11:41,615 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-12-13 14:11:41,615 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2022-12-13 14:11:41,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2022-12-13 14:11:41,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-12-13 14:11:41,616 INFO L218 hiAutomatonCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-12-13 14:11:41,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2022-12-13 14:11:41,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-12-13 14:11:41,619 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) [2022-12-13 14:11:41,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-12-13 14:11:41,620 INFO L240 hiAutomatonCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-12-13 14:11:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 14:11:41,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-12-13 14:11:41,622 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) [2022-12-13 14:11:41,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:41,700 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-12-13 14:11:41,700 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2022-12-13 14:11:41,701 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-12-13 14:11:41,703 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2022-12-13 14:11:41,703 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2022-12-13 14:11:41,703 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2022-12-13 14:11:41,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2022-12-13 14:11:41,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-12-13 14:11:41,704 INFO L218 hiAutomatonCegarLoop]: Abstraction has 58 states and 75 transitions. [2022-12-13 14:11:41,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2022-12-13 14:11:41,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-12-13 14:11:41,707 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) [2022-12-13 14:11:41,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-12-13 14:11:41,707 INFO L240 hiAutomatonCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-12-13 14:11:41,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 14:11:41,708 INFO L428 stractBuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-12-13 14:11:41,708 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-12-13 14:11:41,708 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2022-12-13 14:11:41,709 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-12-13 14:11:41,709 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 14:11:41,709 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 14:11:41,710 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 14:11:41,710 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2022-12-13 14:11:41,710 INFO L748 eck$LassoCheckResult]: Stem: 849#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 850#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 831#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 833#$Ultimate##0 ~n := #in~n; 856#L10 assume !(~n > 100); 830#L11 call #t~ret0 := mc91(11 + ~n);< 832#$Ultimate##0 ~n := #in~n; 865#L10 assume !(~n > 100); 861#L11 call #t~ret0 := mc91(11 + ~n);< 863#$Ultimate##0 ~n := #in~n; 866#L10 assume ~n > 100;#res := ~n - 10; 864#mc91FINAL assume true; 862#mc91EXIT >#20#return; 842#L11-1 call #t~ret1 := mc91(#t~ret0);< 841#$Ultimate##0 ~n := #in~n; 844#L10 assume ~n > 100;#res := ~n - 10; 855#mc91FINAL assume true; 881#mc91EXIT >#22#return; 857#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 836#L11-1 call #t~ret1 := mc91(#t~ret0);< 853#$Ultimate##0 [2022-12-13 14:11:41,710 INFO L750 eck$LassoCheckResult]: Loop: 853#$Ultimate##0 ~n := #in~n; 871#L10 assume !(~n > 100); 846#L11 call #t~ret0 := mc91(11 + ~n);< 845#$Ultimate##0 ~n := #in~n; 848#L10 assume !(~n > 100); 847#L11 call #t~ret0 := mc91(11 + ~n);< 867#$Ultimate##0 ~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);< 870#$Ultimate##0 ~n := #in~n; 868#L10 assume ~n > 100;#res := ~n - 10; 869#mc91FINAL assume true; 880#mc91EXIT >#22#return; 857#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 835#L11-1 call #t~ret1 := mc91(#t~ret0);< 853#$Ultimate##0 [2022-12-13 14:11:41,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:41,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1678623115, now seen corresponding path program 1 times [2022-12-13 14:11:41,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:41,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168252389] [2022-12-13 14:11:41,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:41,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:41,716 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:41,721 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:41,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2037590184, now seen corresponding path program 1 times [2022-12-13 14:11:41,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:41,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227835993] [2022-12-13 14:11:41,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:41,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:41,726 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:41,731 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:41,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:41,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1698366862, now seen corresponding path program 2 times [2022-12-13 14:11:41,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:41,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442945530] [2022-12-13 14:11:41,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:41,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-12-13 14:11:41,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 14:11:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 14:11:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-12-13 14:11:41,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-12-13 14:11:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-12-13 14:11:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 14:11:41,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 14:11:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442945530] [2022-12-13 14:11:41,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442945530] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 14:11:41,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429382241] [2022-12-13 14:11:41,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 14:11:41,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 14:11:41,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:41,912 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 14:11:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 14:11:41,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 14:11:41,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 14:11:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 14:11:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 14:11:41,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 14:11:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-12-13 14:11:42,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429382241] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 14:11:42,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 14:11:42,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-12-13 14:11:42,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240296957] [2022-12-13 14:11:42,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 14:11:42,286 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:42,286 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:42,287 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:42,287 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:42,287 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-12-13 14:11:42,287 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:42,287 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:42,287 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:42,287 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2022-12-13 14:11:42,287 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:42,287 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:42,288 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,293 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,294 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,295 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,296 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,312 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:42,312 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-12-13 14:11:42,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:42,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:42,313 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:42,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-12-13 14:11:42,316 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:42,316 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:42,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Ended with exit code 0 [2022-12-13 14:11:42,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:42,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:42,331 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:42,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-12-13 14:11:42,333 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-12-13 14:11:42,333 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:42,658 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-12-13 14:11:42,661 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-12-13 14:11:42,661 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:42,662 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:42,662 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:42,662 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:42,662 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-12-13 14:11:42,662 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:42,662 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:42,662 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:42,662 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2022-12-13 14:11:42,662 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:42,662 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:42,663 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,667 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,668 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,669 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,670 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:42,687 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:42,687 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-12-13 14:11:42,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:42,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:42,688 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:42,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-12-13 14:11:42,690 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 [2022-12-13 14:11:42,700 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:42,700 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:42,701 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:42,701 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:42,701 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:42,702 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:42,702 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:42,704 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-12-13 14:11:42,706 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-12-13 14:11:42,706 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-12-13 14:11:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:42,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:42,707 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:42,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-12-13 14:11:42,709 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-12-13 14:11:42,709 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-12-13 14:11:42,709 INFO L513 LassoAnalysis]: Proved termination. [2022-12-13 14:11:42,709 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2022-12-13 14:11:42,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Ended with exit code 0 [2022-12-13 14:11:42,712 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-12-13 14:11:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:42,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:11:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:11:42,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:11:42,993 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 [2022-12-13 14:11:42,994 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) [2022-12-13 14:11:43,063 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Ended with exit code 0 [2022-12-13 14:11:43,216 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. [2022-12-13 14:11:43,216 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 [2022-12-13 14:11:43,216 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) [2022-12-13 14:11:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 34 transitions. [2022-12-13 14:11:43,217 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2022-12-13 14:11:43,217 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:43,217 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:43,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:43,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:43,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:11:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:43,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 14:11:43,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 14:11:43,494 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 [2022-12-13 14:11:43,494 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) [2022-12-13 14:11:43,719 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. [2022-12-13 14:11:43,719 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 [2022-12-13 14:11:43,720 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) [2022-12-13 14:11:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2022-12-13 14:11:43,720 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2022-12-13 14:11:43,721 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:43,721 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:43,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:43,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 14:11:43,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:43,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:11:43,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 14:11:43,987 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 [2022-12-13 14:11:43,987 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) [2022-12-13 14:11:44,462 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. [2022-12-13 14:11:44,463 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 [2022-12-13 14:11:44,463 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) [2022-12-13 14:11:44,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 49 transitions. [2022-12-13 14:11:44,464 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2022-12-13 14:11:44,465 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:44,465 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2022-12-13 14:11:44,466 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:44,466 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2022-12-13 14:11:44,467 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:44,467 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 325 states and 417 transitions. [2022-12-13 14:11:44,473 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 25 [2022-12-13 14:11:44,475 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 325 states to 169 states and 230 transitions. [2022-12-13 14:11:44,476 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2022-12-13 14:11:44,476 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2022-12-13 14:11:44,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 230 transitions. [2022-12-13 14:11:44,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-12-13 14:11:44,476 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 230 transitions. [2022-12-13 14:11:44,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 230 transitions. [2022-12-13 14:11:44,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2022-12-13 14:11:44,484 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) [2022-12-13 14:11:44,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2022-12-13 14:11:44,485 INFO L240 hiAutomatonCegarLoop]: Abstraction has 140 states and 178 transitions. [2022-12-13 14:11:44,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 14:11:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 14:11:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-12-13 14:11:44,485 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) [2022-12-13 14:11:44,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 14:11:44,644 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-12-13 14:11:44,644 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138 states and 163 transitions. [2022-12-13 14:11:44,646 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-12-13 14:11:44,649 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138 states to 101 states and 121 transitions. [2022-12-13 14:11:44,649 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2022-12-13 14:11:44,649 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2022-12-13 14:11:44,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 121 transitions. [2022-12-13 14:11:44,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-12-13 14:11:44,649 INFO L218 hiAutomatonCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-12-13 14:11:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states and 121 transitions. [2022-12-13 14:11:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-12-13 14:11:44,655 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) [2022-12-13 14:11:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2022-12-13 14:11:44,656 INFO L240 hiAutomatonCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-12-13 14:11:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-13 14:11:44,656 INFO L428 stractBuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-12-13 14:11:44,657 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-12-13 14:11:44,657 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 117 transitions. [2022-12-13 14:11:44,657 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-12-13 14:11:44,657 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-12-13 14:11:44,657 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-12-13 14:11:44,658 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-12-13 14:11:44,658 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2022-12-13 14:11:44,658 INFO L748 eck$LassoCheckResult]: Stem: 2761#$Ultimate##0 assume { :begin_inline_ULTIMATE.init } true; 2762#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#$Ultimate##0 ~n := #in~n; 2779#L10 assume !(~n > 100); 2780#L11 call #t~ret0 := mc91(11 + ~n);< 2781#$Ultimate##0 ~n := #in~n; 2783#L10 assume !(~n > 100); 2782#L11 call #t~ret0 := mc91(11 + ~n);< 2799#$Ultimate##0 ~n := #in~n; 2801#L10 assume ~n > 100;#res := ~n - 10; 2800#mc91FINAL assume true; 2798#mc91EXIT >#20#return; 2795#L11-1 call #t~ret1 := mc91(#t~ret0);< 2797#$Ultimate##0 ~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#$Ultimate##0 ~n := #in~n; 2786#L10 assume !(~n > 100); 2747#L11 call #t~ret0 := mc91(11 + ~n);< 2755#$Ultimate##0 ~n := #in~n; 2756#L10 assume ~n > 100;#res := ~n - 10; 2770#mc91FINAL assume true; 2836#mc91EXIT >#20#return; 2812#L11-1 call #t~ret1 := mc91(#t~ret0);< 2814#$Ultimate##0 ~n := #in~n; 2829#L10 assume !(~n > 100); 2827#L11 call #t~ret0 := mc91(11 + ~n);< 2745#$Ultimate##0 ~n := #in~n; 2832#L10 assume ~n > 100;#res := ~n - 10; 2831#mc91FINAL assume true; 2826#mc91EXIT >#20#return; 2764#L11-1 call #t~ret1 := mc91(#t~ret0);< 2822#$Ultimate##0 [2022-12-13 14:11:44,658 INFO L750 eck$LassoCheckResult]: Loop: 2822#$Ultimate##0 ~n := #in~n; 2833#L10 assume !(~n > 100); 2828#L11 call #t~ret0 := mc91(11 + ~n);< 2745#$Ultimate##0 ~n := #in~n; 2832#L10 assume ~n > 100;#res := ~n - 10; 2831#mc91FINAL assume true; 2826#mc91EXIT >#20#return; 2765#L11-1 call #t~ret1 := mc91(#t~ret0);< 2822#$Ultimate##0 [2022-12-13 14:11:44,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:44,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1106586231, now seen corresponding path program 3 times [2022-12-13 14:11:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:44,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078761713] [2022-12-13 14:11:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:44,664 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:44,670 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:44,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:44,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1861921664, now seen corresponding path program 2 times [2022-12-13 14:11:44,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:44,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311526174] [2022-12-13 14:11:44,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:44,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:44,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:44,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:44,675 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash 935033096, now seen corresponding path program 4 times [2022-12-13 14:11:44,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 14:11:44,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180879241] [2022-12-13 14:11:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 14:11:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 14:11:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:44,681 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 14:11:44,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 14:11:44,687 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 14:11:44,748 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:44,748 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:44,748 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:44,748 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:44,748 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-12-13 14:11:44,748 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,748 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:44,748 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:44,748 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2022-12-13 14:11:44,748 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:44,748 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:44,749 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,750 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,752 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,756 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,758 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,775 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:44,775 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-12-13 14:11:44,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,776 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-12-13 14:11:44,778 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:44,778 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:44,789 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-12-13 14:11:44,789 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-12-13 14:11:44,792 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,793 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-12-13 14:11:44,795 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:44,795 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:44,806 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-12-13 14:11:44,807 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-12-13 14:11:44,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Ended with exit code 0 [2022-12-13 14:11:44,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,810 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-12-13 14:11:44,813 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-12-13 14:11:44,813 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:44,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2022-12-13 14:11:44,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,827 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-12-13 14:11:44,829 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-12-13 14:11:44,829 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-12-13 14:11:44,850 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-12-13 14:11:44,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:44,853 INFO L210 LassoAnalysis]: Preferences: [2022-12-13 14:11:44,853 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-12-13 14:11:44,853 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-12-13 14:11:44,853 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-12-13 14:11:44,853 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-12-13 14:11:44,853 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,853 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-12-13 14:11:44,853 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-12-13 14:11:44,853 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2022-12-13 14:11:44,853 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-12-13 14:11:44,853 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-12-13 14:11:44,854 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,856 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,857 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,860 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,861 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-12-13 14:11:44,873 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-12-13 14:11:44,873 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-12-13 14:11:44,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,874 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-12-13 14:11:44,876 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 [2022-12-13 14:11:44,886 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:44,886 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:44,886 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:44,886 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:44,887 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:44,887 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:44,887 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:44,889 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-12-13 14:11:44,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Ended with exit code 0 [2022-12-13 14:11:44,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,892 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-12-13 14:11:44,894 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 [2022-12-13 14:11:44,904 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:44,904 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:44,904 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:44,904 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:44,904 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:44,905 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:44,905 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:44,906 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-12-13 14:11:44,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-12-13 14:11:44,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,909 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-12-13 14:11:44,911 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 [2022-12-13 14:11:44,923 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-12-13 14:11:44,923 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-12-13 14:11:44,923 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-12-13 14:11:44,923 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-12-13 14:11:44,923 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-12-13 14:11:44,924 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-12-13 14:11:44,924 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-12-13 14:11:44,926 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-12-13 14:11:44,929 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-12-13 14:11:44,929 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-12-13 14:11:44,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-12-13 14:11:44,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 14:11:44,930 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-12-13 14:11:44,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-12-13 14:11:44,932 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-12-13 14:11:44,932 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-12-13 14:11:44,932 INFO L513 LassoAnalysis]: Proved termination. [2022-12-13 14:11:44,932 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 201 Supporting invariants [] [2022-12-13 14:11:44,935 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Ended with exit code 0 [2022-12-13 14:11:44,935 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-12-13 14:11:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:44,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:44,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:11:44,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:44,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Ended with exit code 0 [2022-12-13 14:11:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:45,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:11:45,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:45,186 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 [2022-12-13 14:11:45,187 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) [2022-12-13 14:11:45,249 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. [2022-12-13 14:11:45,249 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 [2022-12-13 14:11:45,250 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) [2022-12-13 14:11:45,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2022-12-13 14:11:45,250 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 38 letters. Loop has 8 letters. [2022-12-13 14:11:45,250 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:45,250 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:45,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:11:45,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:45,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:11:45,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:45,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:45,533 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 [2022-12-13 14:11:45,533 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) [2022-12-13 14:11:45,699 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. [2022-12-13 14:11:45,699 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 [2022-12-13 14:11:45,700 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) [2022-12-13 14:11:45,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2022-12-13 14:11:45,700 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 38 letters. Loop has 8 letters. [2022-12-13 14:11:45,700 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:45,700 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:45,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:45,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:11:45,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:45,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:11:45,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:45,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:45,952 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 [2022-12-13 14:11:45,952 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) [2022-12-13 14:11:46,016 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. [2022-12-13 14:11:46,017 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 [2022-12-13 14:11:46,017 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) [2022-12-13 14:11:46,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-12-13 14:11:46,018 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 38 letters. Loop has 8 letters. [2022-12-13 14:11:46,018 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:46,018 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-12-13 14:11:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 14:11:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:46,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 14:11:46,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 14:11:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 14:11:46,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 14:11:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 14:11:46,251 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 [2022-12-13 14:11:46,251 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) [2022-12-13 14:11:46,435 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. [2022-12-13 14:11:46,435 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 [2022-12-13 14:11:46,436 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) [2022-12-13 14:11:46,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 27 transitions. [2022-12-13 14:11:46,436 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 8 letters. [2022-12-13 14:11:46,437 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:46,437 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 46 letters. Loop has 8 letters. [2022-12-13 14:11:46,437 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:46,437 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 16 letters. [2022-12-13 14:11:46,438 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-12-13 14:11:46,438 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 209 transitions. [2022-12-13 14:11:46,439 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-12-13 14:11:46,439 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 0 states and 0 transitions. [2022-12-13 14:11:46,440 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-12-13 14:11:46,440 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-12-13 14:11:46,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-12-13 14:11:46,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 14:11:46,440 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 14:11:46,440 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 14:11:46,440 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 14:11:46,440 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-12-13 14:11:46,440 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-12-13 14:11:46,440 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-12-13 14:11:46,440 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-12-13 14:11:46,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 13.12 02:11:46 BoogieIcfgContainer [2022-12-13 14:11:46,445 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-12-13 14:11:46,445 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 14:11:46,445 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 14:11:46,445 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 14:11:46,445 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 02:11:15" (3/4) ... [2022-12-13 14:11:46,447 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-12-13 14:11:46,447 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 14:11:46,448 INFO L158 Benchmark]: Toolchain (without parser) took 31595.20ms. Allocated memory is still 146.8MB. Free memory was 111.4MB in the beginning and 34.3MB in the end (delta: 77.1MB). Peak memory consumption was 79.4MB. Max. memory is 16.1GB. [2022-12-13 14:11:46,448 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory is still 78.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:11:46,448 INFO L158 Benchmark]: CACSL2BoogieTranslator took 129.20ms. Allocated memory is still 146.8MB. Free memory was 111.4MB in the beginning and 102.4MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 14:11:46,448 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.58ms. Allocated memory is still 146.8MB. Free memory was 102.4MB in the beginning and 101.5MB in the end (delta: 900.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 14:11:46,448 INFO L158 Benchmark]: Boogie Preprocessor took 11.64ms. Allocated memory is still 146.8MB. Free memory was 101.5MB in the beginning and 100.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:11:46,449 INFO L158 Benchmark]: RCFGBuilder took 168.02ms. Allocated memory is still 146.8MB. Free memory was 100.3MB in the beginning and 91.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-12-13 14:11:46,449 INFO L158 Benchmark]: BuchiAutomizer took 31258.68ms. Allocated memory is still 146.8MB. Free memory was 91.9MB in the beginning and 34.3MB in the end (delta: 57.7MB). Peak memory consumption was 60.5MB. Max. memory is 16.1GB. [2022-12-13 14:11:46,449 INFO L158 Benchmark]: Witness Printer took 2.31ms. Allocated memory is still 146.8MB. Free memory is still 34.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 14:11:46,450 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 107.0MB. Free memory is still 78.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 129.20ms. Allocated memory is still 146.8MB. Free memory was 111.4MB in the beginning and 102.4MB in the end (delta: 9.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.58ms. Allocated memory is still 146.8MB. Free memory was 102.4MB in the beginning and 101.5MB in the end (delta: 900.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.64ms. Allocated memory is still 146.8MB. Free memory was 101.5MB in the beginning and 100.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 168.02ms. Allocated memory is still 146.8MB. Free memory was 100.3MB in the beginning and 91.9MB in the end (delta: 8.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * BuchiAutomizer took 31258.68ms. Allocated memory is still 146.8MB. Free memory was 91.9MB in the beginning and 34.3MB in the end (delta: 57.7MB). Peak memory consumption was 60.5MB. Max. memory is 16.1GB. * Witness Printer took 2.31ms. Allocated memory is still 146.8MB. Free memory is still 34.3MB. 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 31.2s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 26.6s. Construction of modules took 0.5s. Büchi inclusion checks took 3.9s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.0s 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, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 289 mSDsluCounter, 382 SdHoareTripleChecker+Invalid, 0.5s 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: 52ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 24.8s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-12-13 14:11:46,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 14:11:46,662 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1a1135e1-ea6c-4954-81bf-43b793129abb/bin/uautomizer-uyxdKDjOR8/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