./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 e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/config/AutomizerTermination.xml -i ../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/config/svcomp-Termination-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8 --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-e04fb08 [2022-11-16 12:51:19,095 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:51:19,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:51:19,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:51:19,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:51:19,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:51:19,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:51:19,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:51:19,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:51:19,155 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:51:19,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:51:19,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:51:19,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:51:19,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:51:19,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:51:19,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:51:19,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:51:19,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:51:19,163 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:51:19,165 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:51:19,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:51:19,170 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:51:19,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:51:19,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:51:19,189 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:51:19,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:51:19,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:51:19,192 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:51:19,192 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:51:19,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:51:19,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:51:19,195 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:51:19,197 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:51:19,198 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:51:19,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:51:19,200 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:51:19,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:51:19,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:51:19,201 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:51:19,202 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:51:19,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:51:19,204 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/config/svcomp-Termination-64bit-Automizer_Default.epf [2022-11-16 12:51:19,243 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:51:19,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:51:19,244 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:51:19,244 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:51:19,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:51:19,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:51:19,246 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:51:19,247 INFO L136 SettingsManager]: Preferences of BuchiAutomizer differ from their defaults: [2022-11-16 12:51:19,247 INFO L138 SettingsManager]: * NCSB implementation=INTSET_LAZY3 [2022-11-16 12:51:19,247 INFO L138 SettingsManager]: * Use old map elimination=false [2022-11-16 12:51:19,248 INFO L138 SettingsManager]: * Use external solver (rank synthesis)=false [2022-11-16 12:51:19,248 INFO L138 SettingsManager]: * Use only trivial implications for array writes=true [2022-11-16 12:51:19,248 INFO L138 SettingsManager]: * Rank analysis=LINEAR_WITH_GUESSES [2022-11-16 12:51:19,249 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:51:19,249 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:51:19,249 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:51:19,249 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:51:19,249 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=ASSUME [2022-11-16 12:51:19,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=ASSUME [2022-11-16 12:51:19,250 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=ASSUME [2022-11-16 12:51:19,250 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:51:19,250 INFO L138 SettingsManager]: * Assume nondeterminstic values are in range=false [2022-11-16 12:51:19,250 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:51:19,252 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=ASSUME [2022-11-16 12:51:19,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:51:19,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:51:19,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:51:19,252 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:51:19,253 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-11-16 12:51:19,254 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_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(F end) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b4d53423478efbe88c69a2c2de1bb984f61e7e586fd7bb6761452f26ace425f7 [2022-11-16 12:51:19,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:51:19,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:51:19,609 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:51:19,611 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:51:19,612 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:51:19,613 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2022-11-16 12:51:19,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/data/446870877/b9415b9c83764ae4a2e26953539fe6c8/FLAGbec2fc195 [2022-11-16 12:51:20,127 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:51:20,127 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/sv-benchmarks/c/termination-crafted/McCarthy91_Recursion.c [2022-11-16 12:51:20,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/data/446870877/b9415b9c83764ae4a2e26953539fe6c8/FLAGbec2fc195 [2022-11-16 12:51:20,537 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/data/446870877/b9415b9c83764ae4a2e26953539fe6c8 [2022-11-16 12:51:20,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:51:20,543 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:51:20,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:51:20,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:51:20,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:51:20,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@203663f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20, skipping insertion in model container [2022-11-16 12:51:20,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:51:20,574 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:51:20,730 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:51:20,733 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:51:20,761 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:51:20,773 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:51:20,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20 WrapperNode [2022-11-16 12:51:20,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:51:20,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:51:20,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:51:20,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:51:20,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,789 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,804 INFO L138 Inliner]: procedures = 5, calls = 5, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 6 [2022-11-16 12:51:20,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:51:20,805 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:51:20,806 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:51:20,806 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:51:20,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,816 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,817 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,818 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,820 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,822 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:51:20,823 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:51:20,824 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:51:20,824 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:51:20,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (1/1) ... [2022-11-16 12:51:20,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:20,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:20,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:20,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Waiting until timeout for monitored process [2022-11-16 12:51:20,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:51:20,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:51:20,907 INFO L130 BoogieDeclarations]: Found specification of procedure mc91 [2022-11-16 12:51:20,908 INFO L138 BoogieDeclarations]: Found implementation of procedure mc91 [2022-11-16 12:51:20,967 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:51:20,969 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:51:21,077 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:51:21,084 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:51:21,084 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-16 12:51:21,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:51:21 BoogieIcfgContainer [2022-11-16 12:51:21,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:51:21,087 INFO L113 PluginConnector]: ------------------------BuchiAutomizer---------------------------- [2022-11-16 12:51:21,087 INFO L271 PluginConnector]: Initializing BuchiAutomizer... [2022-11-16 12:51:21,093 INFO L275 PluginConnector]: BuchiAutomizer initialized [2022-11-16 12:51:21,094 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:51:21,094 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "CDTParser AST 16.11 12:51:20" (1/3) ... [2022-11-16 12:51:21,095 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@131ece31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.11 12:51:21, skipping insertion in model container [2022-11-16 12:51:21,095 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:51:21,095 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:51:20" (2/3) ... [2022-11-16 12:51:21,096 INFO L205 PluginConnector]: Invalid model from BuchiAutomizer for observer de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer.BuchiAutomizerObserver@131ece31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer AST 16.11 12:51:21, skipping insertion in model container [2022-11-16 12:51:21,096 INFO L99 BuchiAutomizer]: Safety of program was proven or not checked, starting termination analysis [2022-11-16 12:51:21,096 INFO L185 PluginConnector]: Executing the observer BuchiAutomizerObserver from plugin BuchiAutomizer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:51:21" (3/3) ... [2022-11-16 12:51:21,098 INFO L332 chiAutomizerObserver]: Analyzing ICFG McCarthy91_Recursion.c [2022-11-16 12:51:21,168 INFO L303 stractBuchiCegarLoop]: Interprodecural is true [2022-11-16 12:51:21,168 INFO L304 stractBuchiCegarLoop]: Hoare is false [2022-11-16 12:51:21,169 INFO L305 stractBuchiCegarLoop]: Compute interpolants for ForwardPredicates [2022-11-16 12:51:21,169 INFO L306 stractBuchiCegarLoop]: Backedges is STRAIGHT_LINE [2022-11-16 12:51:21,169 INFO L307 stractBuchiCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2022-11-16 12:51:21,169 INFO L308 stractBuchiCegarLoop]: Difference is false [2022-11-16 12:51:21,169 INFO L309 stractBuchiCegarLoop]: Minimize is MINIMIZE_SEVPA [2022-11-16 12:51:21,170 INFO L313 stractBuchiCegarLoop]: ======== Iteration 0 == of CEGAR loop == BuchiAutomatonCegarLoop ======== [2022-11-16 12:51:21,176 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:51:21,215 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-16 12:51:21,217 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:51:21,218 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:51:21,225 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-16 12:51:21,225 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:51:21,225 INFO L335 stractBuchiCegarLoop]: ======== Iteration 1 ============ [2022-11-16 12:51:21,226 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-16 12:51:21,228 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-16 12:51:21,229 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:51:21,229 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:51:21,229 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [1, 1, 1] [2022-11-16 12:51:21,229 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:51:21,237 INFO L748 eck$LassoCheckResult]: Stem: 5#ULTIMATE.startENTRYtrue assume { :begin_inline_ULTIMATE.init } true; 7#L-1true assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2#L16true call main_#t~ret3#1 := mc91(main_~x~0#1);< 6#mc91ENTRYtrue [2022-11-16 12:51:21,237 INFO L750 eck$LassoCheckResult]: Loop: 6#mc91ENTRYtrue ~n := #in~n; 10#L10true assume !(~n > 100); 11#L11true call #t~ret0 := mc91(11 + ~n);< 6#mc91ENTRYtrue [2022-11-16 12:51:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:21,244 INFO L85 PathProgramCache]: Analyzing trace with hash 29870, now seen corresponding path program 1 times [2022-11-16 12:51:21,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:21,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254558935] [2022-11-16 12:51:21,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:21,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:21,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:21,335 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:21,367 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:21,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:21,370 INFO L85 PathProgramCache]: Analyzing trace with hash 37870, now seen corresponding path program 1 times [2022-11-16 12:51:21,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:21,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220767473] [2022-11-16 12:51:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:21,396 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:21,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:21,405 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:21,416 INFO L85 PathProgramCache]: Analyzing trace with hash 889865249, now seen corresponding path program 1 times [2022-11-16 12:51:21,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:21,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821579659] [2022-11-16 12:51:21,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:21,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:21,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:21,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:21,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:21,440 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:21,583 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:21,584 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:21,584 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:21,585 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:21,585 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:51:21,585 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:21,585 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:21,585 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:21,586 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2022-11-16 12:51:21,586 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:21,586 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:21,601 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,631 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,635 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,638 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,642 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,722 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:21,722 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:51:21,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:21,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:21,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:21,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Waiting until timeout for monitored process [2022-11-16 12:51:21,739 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:21,740 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:21,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (2)] Ended with exit code 0 [2022-11-16 12:51:21,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:21,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:21,770 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:21,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Waiting until timeout for monitored process [2022-11-16 12:51:21,775 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:51:21,775 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:21,815 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:51:21,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:21,824 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:21,824 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:21,824 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:21,824 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:21,824 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:51:21,824 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:21,824 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:21,825 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:21,825 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration1_Loop [2022-11-16 12:51:21,825 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:21,825 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:21,826 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,843 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,847 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,854 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,859 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:21,897 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:21,902 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:51:21,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:21,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:21,905 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:21,916 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Waiting until timeout for monitored process [2022-11-16 12:51:21,917 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:21,938 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:21,938 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:21,939 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:21,939 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:21,939 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:21,942 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:21,942 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:21,949 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:51:21,959 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:51:21,959 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:51:21,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:21,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:21,966 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:21,971 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:51:21,971 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:51:21,972 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:51:21,973 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 211 Supporting invariants [] [2022-11-16 12:51:21,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Waiting until timeout for monitored process [2022-11-16 12:51:21,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:21,982 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:51:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:51:22,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:22,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:51:22,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:22,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:22,140 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.1 stem predicates 3 loop predicates [2022-11-16 12:51:22,142 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:22,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:22,380 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3). Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Result 32 states and 39 transitions. Complement of second has 12 states. [2022-11-16 12:51:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 4 states 1 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:22,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:51:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 8 transitions. [2022-11-16 12:51:22,393 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 3 letters. [2022-11-16 12:51:22,394 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:22,394 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 6 letters. Loop has 3 letters. [2022-11-16 12:51:22,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:22,395 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 4 states and 8 transitions. Stem has 3 letters. Loop has 6 letters. [2022-11-16 12:51:22,395 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:22,396 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 32 states and 39 transitions. [2022-11-16 12:51:22,399 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-16 12:51:22,405 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 32 states to 19 states and 25 transitions. [2022-11-16 12:51:22,406 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 13 [2022-11-16 12:51:22,406 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 14 [2022-11-16 12:51:22,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 25 transitions. [2022-11-16 12:51:22,408 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:51:22,408 INFO L218 hiAutomatonCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-16 12:51:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states and 25 transitions. [2022-11-16 12:51:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-11-16 12:51:22,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:22,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-11-16 12:51:22,433 INFO L240 hiAutomatonCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-16 12:51:22,433 INFO L428 stractBuchiCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-11-16 12:51:22,433 INFO L335 stractBuchiCegarLoop]: ======== Iteration 2 ============ [2022-11-16 12:51:22,433 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 17 states and 21 transitions. [2022-11-16 12:51:22,434 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-16 12:51:22,434 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:51:22,434 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:51:22,435 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:22,435 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:22,436 INFO L748 eck$LassoCheckResult]: Stem: 107#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 108#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 102#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 104#mc91ENTRY ~n := #in~n; 109#L10 assume !(~n > 100); 101#L11 call #t~ret0 := mc91(11 + ~n);< 103#mc91ENTRY ~n := #in~n; 110#L10 assume ~n > 100;#res := ~n - 10; 105#mc91FINAL assume true; 106#mc91EXIT >#20#return; 99#L11-1 [2022-11-16 12:51:22,436 INFO L750 eck$LassoCheckResult]: Loop: 99#L11-1 call #t~ret1 := mc91(#t~ret0);< 100#mc91ENTRY ~n := #in~n; 113#L10 assume !(~n > 100); 98#L11 call #t~ret0 := mc91(11 + ~n);< 100#mc91ENTRY ~n := #in~n; 113#L10 assume ~n > 100;#res := ~n - 10; 112#mc91FINAL assume true; 114#mc91EXIT >#20#return; 99#L11-1 [2022-11-16 12:51:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1612519912, now seen corresponding path program 1 times [2022-11-16 12:51:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:22,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938934529] [2022-11-16 12:51:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:22,446 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:22,454 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash -696734814, now seen corresponding path program 1 times [2022-11-16 12:51:22,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:22,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880773375] [2022-11-16 12:51:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:22,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:22,463 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:22,471 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:22,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:22,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1110240905, now seen corresponding path program 1 times [2022-11-16 12:51:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:22,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020172443] [2022-11-16 12:51:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:22,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:22,485 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:22,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:22,512 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:22,670 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:22,670 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:22,670 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:22,670 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:22,670 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:51:22,671 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:22,671 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:22,671 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:22,671 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2022-11-16 12:51:22,671 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:22,671 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:22,673 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:22,676 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:22,687 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:22,728 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:22,729 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:51:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:22,730 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:22,743 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:22,743 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:22,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Waiting until timeout for monitored process [2022-11-16 12:51:22,767 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:51:22,767 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret1=0} Honda state: {mc91_#t~ret1=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:51:22,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:22,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:22,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:22,779 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:22,792 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:22,792 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:22,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Waiting until timeout for monitored process [2022-11-16 12:51:22,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:22,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:22,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:22,850 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:22,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Waiting until timeout for monitored process [2022-11-16 12:51:22,855 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:51:22,855 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:34,907 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2022-11-16 12:51:34,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:34,914 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:34,914 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:34,914 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:34,914 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:34,914 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:51:34,914 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:34,914 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:34,914 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:34,915 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration2_Loop [2022-11-16 12:51:34,915 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:34,915 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:34,916 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:34,922 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:34,934 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:34,985 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:34,985 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:51:34,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:34,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:34,987 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:35,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Waiting until timeout for monitored process [2022-11-16 12:51:35,001 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:35,014 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:35,014 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:35,014 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:35,014 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:35,014 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:35,017 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:35,017 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:35,034 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-16 12:51:35,043 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:35,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:35,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:35,045 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:35,059 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:35,072 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:35,072 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:35,073 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:35,073 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:35,073 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:35,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Waiting until timeout for monitored process [2022-11-16 12:51:35,077 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:35,079 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:35,094 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:51:35,107 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:51:35,107 INFO L444 ModelExtractionUtils]: 2 out of 5 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:51:35,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:35,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:35,109 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:35,118 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:51:35,118 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:51:35,118 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:51:35,118 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#t~ret0) = -2*mc91_#t~ret0 + 201 Supporting invariants [] [2022-11-16 12:51:35,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Waiting until timeout for monitored process [2022-11-16 12:51:35,125 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (10)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:35,127 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:51:35,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:35,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-16 12:51:35,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:35,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:35,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:51:35,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:35,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:35,455 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-16 12:51:35,456 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6 Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:51:35,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:35,713 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 17 states and 21 transitions. cyclomatic complexity: 6. Second operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Result 51 states and 73 transitions. Complement of second has 32 states. [2022-11-16 12:51:35,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 8 states 2 stem states 5 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:35,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-16 12:51:35,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 17 transitions. [2022-11-16 12:51:35,717 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 8 letters. [2022-11-16 12:51:35,717 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:35,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 18 letters. Loop has 8 letters. [2022-11-16 12:51:35,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:35,718 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 8 states and 17 transitions. Stem has 10 letters. Loop has 16 letters. [2022-11-16 12:51:35,718 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:35,719 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 51 states and 73 transitions. [2022-11-16 12:51:35,723 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-11-16 12:51:35,726 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 51 states to 42 states and 62 transitions. [2022-11-16 12:51:35,727 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-11-16 12:51:35,727 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 27 [2022-11-16 12:51:35,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 62 transitions. [2022-11-16 12:51:35,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:51:35,728 INFO L218 hiAutomatonCegarLoop]: Abstraction has 42 states and 62 transitions. [2022-11-16 12:51:35,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states and 62 transitions. [2022-11-16 12:51:35,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-11-16 12:51:35,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (13), 7 states have call predecessors, (13), 4 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-11-16 12:51:35,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2022-11-16 12:51:35,736 INFO L240 hiAutomatonCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-11-16 12:51:35,736 INFO L428 stractBuchiCegarLoop]: Abstraction has 36 states and 51 transitions. [2022-11-16 12:51:35,736 INFO L335 stractBuchiCegarLoop]: ======== Iteration 3 ============ [2022-11-16 12:51:35,737 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 36 states and 51 transitions. [2022-11-16 12:51:35,738 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 7 [2022-11-16 12:51:35,738 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:51:35,738 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:51:35,739 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:35,739 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [1, 1, 1] [2022-11-16 12:51:35,740 INFO L748 eck$LassoCheckResult]: Stem: 298#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 299#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 291#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 292#mc91ENTRY ~n := #in~n; 314#L10 assume !(~n > 100); 289#L11 call #t~ret0 := mc91(11 + ~n);< 290#mc91ENTRY ~n := #in~n; 302#L10 assume ~n > 100;#res := ~n - 10; 315#mc91FINAL assume true; 313#mc91EXIT >#20#return; 286#L11-1 call #t~ret1 := mc91(#t~ret0);< 309#mc91ENTRY ~n := #in~n; 317#L10 assume !(~n > 100); 283#L11 [2022-11-16 12:51:35,740 INFO L750 eck$LassoCheckResult]: Loop: 283#L11 call #t~ret0 := mc91(11 + ~n);< 284#mc91ENTRY ~n := #in~n; 300#L10 assume !(~n > 100); 283#L11 [2022-11-16 12:51:35,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash -628486927, now seen corresponding path program 2 times [2022-11-16 12:51:35,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:35,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518444259] [2022-11-16 12:51:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:35,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:35,751 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:35,759 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:35,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:35,760 INFO L85 PathProgramCache]: Analyzing trace with hash 48310, now seen corresponding path program 2 times [2022-11-16 12:51:35,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:35,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424661700] [2022-11-16 12:51:35,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:35,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:35,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:35,765 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:35,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:35,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:35,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:35,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1491580474, now seen corresponding path program 3 times [2022-11-16 12:51:35,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:35,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713307083] [2022-11-16 12:51:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:35,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:35,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:35,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:51:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-16 12:51:35,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:35,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713307083] [2022-11-16 12:51:35,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713307083] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:51:35,959 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:51:35,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 12:51:35,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240930532] [2022-11-16 12:51:35,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:51:36,023 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:36,024 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:36,024 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:36,024 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:36,024 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:51:36,024 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:36,025 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:36,025 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:36,025 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2022-11-16 12:51:36,025 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:36,025 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:36,029 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:36,037 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:36,039 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:36,042 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:36,073 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:36,073 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:51:36,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:36,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:36,078 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:36,092 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:36,092 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:36,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Waiting until timeout for monitored process [2022-11-16 12:51:36,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:36,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:36,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:36,144 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:36,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Waiting until timeout for monitored process [2022-11-16 12:51:36,148 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:51:36,148 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:48,193 INFO L442 LassoAnalysis]: Proving nontermination failed: SMT Solver returned 'unknown'. [2022-11-16 12:51:48,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:48,207 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:48,207 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:48,207 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:48,207 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:48,207 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:51:48,207 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:48,207 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:48,207 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:48,207 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration3_Loop [2022-11-16 12:51:48,207 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:48,208 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:48,208 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:48,220 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:48,224 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:48,227 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:48,273 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:48,273 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:51:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:48,275 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:48,283 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:48,295 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:48,295 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:48,295 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:48,295 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:48,296 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:48,298 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:48,298 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:48,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Waiting until timeout for monitored process [2022-11-16 12:51:48,309 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:51:48,312 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:51:48,312 INFO L444 ModelExtractionUtils]: 1 out of 4 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:51:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:48,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:48,313 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:48,322 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:51:48,322 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:51:48,322 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:51:48,322 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_~n) = -2*mc91_~n + 189 Supporting invariants [] [2022-11-16 12:51:48,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Waiting until timeout for monitored process [2022-11-16 12:51:48,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:48,332 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:51:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:48,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:51:48,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:48,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:51:48,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:48,516 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-16 12:51:48,517 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:48,599 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 43 states and 59 transitions. Complement of second has 13 states. [2022-11-16 12:51:48,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:48,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:48,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2022-11-16 12:51:48,601 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2022-11-16 12:51:48,601 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:48,602 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:48,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:48,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:51:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:51:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:48,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:48,769 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-16 12:51:48,770 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:48,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:48,845 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 43 states and 59 transitions. Complement of second has 13 states. [2022-11-16 12:51:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:48,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 11 transitions. [2022-11-16 12:51:48,847 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 11 transitions. Stem has 13 letters. Loop has 3 letters. [2022-11-16 12:51:48,848 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:48,848 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:48,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:48,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-16 12:51:48,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:48,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:48,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-16 12:51:48,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:48,986 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 3 loop predicates [2022-11-16 12:51:48,986 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19 Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:49,061 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 36 states and 51 transitions. cyclomatic complexity: 19. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Result 71 states and 100 transitions. Complement of second has 16 states. [2022-11-16 12:51:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 6 states 2 stem states 3 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:49,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:49,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 19 transitions. [2022-11-16 12:51:49,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 3 letters. [2022-11-16 12:51:49,064 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:49,064 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 16 letters. Loop has 3 letters. [2022-11-16 12:51:49,064 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:49,065 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 6 states and 19 transitions. Stem has 13 letters. Loop has 6 letters. [2022-11-16 12:51:49,065 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:49,065 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 71 states and 100 transitions. [2022-11-16 12:51:49,068 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 9 [2022-11-16 12:51:49,070 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 71 states to 48 states and 74 transitions. [2022-11-16 12:51:49,070 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 26 [2022-11-16 12:51:49,070 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 28 [2022-11-16 12:51:49,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 74 transitions. [2022-11-16 12:51:49,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:51:49,071 INFO L218 hiAutomatonCegarLoop]: Abstraction has 48 states and 74 transitions. [2022-11-16 12:51:49,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states and 74 transitions. [2022-11-16 12:51:49,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-16 12:51:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 11 states have call successors, (18), 9 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 8 states have call successors, (15) [2022-11-16 12:51:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 60 transitions. [2022-11-16 12:51:49,077 INFO L240 hiAutomatonCegarLoop]: Abstraction has 42 states and 60 transitions. [2022-11-16 12:51:49,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:49,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:51:49,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:51:49,081 INFO L87 Difference]: Start difference. First operand 42 states and 60 transitions. Second operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-16 12:51:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:49,213 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2022-11-16 12:51:49,213 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 63 states and 82 transitions. [2022-11-16 12:51:49,215 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-16 12:51:49,217 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 63 states to 58 states and 75 transitions. [2022-11-16 12:51:49,218 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 42 [2022-11-16 12:51:49,218 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 42 [2022-11-16 12:51:49,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 75 transitions. [2022-11-16 12:51:49,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:51:49,219 INFO L218 hiAutomatonCegarLoop]: Abstraction has 58 states and 75 transitions. [2022-11-16 12:51:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states and 75 transitions. [2022-11-16 12:51:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-16 12:51:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 37 states have internal predecessors, (37), 13 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (19), 8 states have call predecessors, (19), 11 states have call successors, (19) [2022-11-16 12:51:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2022-11-16 12:51:49,225 INFO L240 hiAutomatonCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-11-16 12:51:49,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-16 12:51:49,226 INFO L428 stractBuchiCegarLoop]: Abstraction has 57 states and 74 transitions. [2022-11-16 12:51:49,227 INFO L335 stractBuchiCegarLoop]: ======== Iteration 4 ============ [2022-11-16 12:51:49,227 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 57 states and 74 transitions. [2022-11-16 12:51:49,228 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 11 [2022-11-16 12:51:49,228 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:51:49,228 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:51:49,230 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-16 12:51:49,230 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [4, 3, 2, 2, 2, 2, 2, 1, 1] [2022-11-16 12:51:49,230 INFO L748 eck$LassoCheckResult]: Stem: 843#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 844#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 834#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 835#mc91ENTRY ~n := #in~n; 867#L10 assume !(~n > 100); 860#L11 call #t~ret0 := mc91(11 + ~n);< 862#mc91ENTRY ~n := #in~n; 865#L10 assume !(~n > 100); 859#L11 call #t~ret0 := mc91(11 + ~n);< 863#mc91ENTRY ~n := #in~n; 866#L10 assume ~n > 100;#res := ~n - 10; 864#mc91FINAL assume true; 861#mc91EXIT >#20#return; 846#L11-1 call #t~ret1 := mc91(#t~ret0);< 845#mc91ENTRY ~n := #in~n; 848#L10 assume ~n > 100;#res := ~n - 10; 854#mc91FINAL assume true; 881#mc91EXIT >#22#return; 855#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 838#L11-1 call #t~ret1 := mc91(#t~ret0);< 852#mc91ENTRY [2022-11-16 12:51:49,230 INFO L750 eck$LassoCheckResult]: Loop: 852#mc91ENTRY ~n := #in~n; 870#L10 assume !(~n > 100); 831#L11 call #t~ret0 := mc91(11 + ~n);< 832#mc91ENTRY ~n := #in~n; 849#L10 assume !(~n > 100); 830#L11 call #t~ret0 := mc91(11 + ~n);< 833#mc91ENTRY ~n := #in~n; 877#L10 assume ~n > 100;#res := ~n - 10; 875#mc91FINAL assume true; 873#mc91EXIT >#20#return; 827#L11-1 call #t~ret1 := mc91(#t~ret0);< 871#mc91ENTRY ~n := #in~n; 868#L10 assume ~n > 100;#res := ~n - 10; 869#mc91FINAL assume true; 880#mc91EXIT >#22#return; 855#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 879#mc91FINAL assume true; 878#mc91EXIT >#20#return; 837#L11-1 call #t~ret1 := mc91(#t~ret0);< 852#mc91ENTRY [2022-11-16 12:51:49,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1678623115, now seen corresponding path program 1 times [2022-11-16 12:51:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:49,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688101743] [2022-11-16 12:51:49,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:49,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:49,240 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:49,249 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:49,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:49,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2037590184, now seen corresponding path program 1 times [2022-11-16 12:51:49,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:49,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680419031] [2022-11-16 12:51:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:49,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:49,259 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:49,267 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:49,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:49,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1698366862, now seen corresponding path program 2 times [2022-11-16 12:51:49,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:49,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151274812] [2022-11-16 12:51:49,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:49,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-16 12:51:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:51:49,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:51:49,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-11-16 12:51:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-16 12:51:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-11-16 12:51:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:49,616 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:51:49,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:51:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151274812] [2022-11-16 12:51:49,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151274812] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:51:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092635530] [2022-11-16 12:51:49,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:51:49,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:51:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:49,619 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:51:49,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:51:49,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:51:49,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:51:49,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-16 12:51:49,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:49,722 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:51:49,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:51:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 23 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-16 12:51:49,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092635530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:51:49,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:51:49,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 17 [2022-11-16 12:51:49,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254066567] [2022-11-16 12:51:50,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:51:50,236 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:50,236 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:50,237 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:50,237 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:50,237 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:51:50,237 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:50,237 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:50,237 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:50,237 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2022-11-16 12:51:50,237 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:50,237 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:50,238 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,246 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,248 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,251 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,253 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,287 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:50,287 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:51:50,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:50,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:50,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:50,297 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:50,297 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:50,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Waiting until timeout for monitored process [2022-11-16 12:51:50,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:50,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:50,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:50,325 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:50,339 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:51:50,339 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:50,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Waiting until timeout for monitored process [2022-11-16 12:51:50,691 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:51:50,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (18)] Ended with exit code 0 [2022-11-16 12:51:50,699 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:50,699 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:50,699 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:50,699 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:50,699 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:51:50,699 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:50,699 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:50,699 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:50,699 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration4_Loop [2022-11-16 12:51:50,699 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:50,699 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:50,700 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,709 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,711 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,714 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,716 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:50,749 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:50,749 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:51:50,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:50,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:50,754 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:50,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Waiting until timeout for monitored process [2022-11-16 12:51:50,775 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:50,787 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:50,787 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:50,788 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:50,788 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:50,788 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:50,790 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:50,790 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:50,801 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:51:50,804 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:51:50,805 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:51:50,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:50,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:50,810 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:50,822 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:51:50,822 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:51:50,822 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:51:50,822 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -1*mc91_#in~n + 90 Supporting invariants [] [2022-11-16 12:51:50,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Waiting until timeout for monitored process [2022-11-16 12:51:50,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:50,832 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:51:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:50,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:51:50,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:51,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:51:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:51:51,336 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-16 12:51:51,337 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:51:51,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:51,775 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Result 125 states and 150 transitions. Complement of second has 37 states. [2022-11-16 12:51:51,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 13 states 2 stem states 10 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:51:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 34 transitions. [2022-11-16 12:51:51,777 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 13 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2022-11-16 12:51:51,777 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:51,777 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:51,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:51,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:51:51,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:52,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-16 12:51:52,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-16 12:51:52,263 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 10 loop predicates [2022-11-16 12:51:52,263 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:51:52,692 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Result 125 states and 150 transitions. Complement of second has 47 states. [2022-11-16 12:51:52,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 14 states 2 stem states 11 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 6 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-16 12:51:52,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 34 transitions. [2022-11-16 12:51:52,695 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 14 states and 34 transitions. Stem has 22 letters. Loop has 19 letters. [2022-11-16 12:51:52,695 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:52,695 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:52,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-16 12:51:52,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:52,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:51:52,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:53,139 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-16 12:51:53,140 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 9 loop predicates [2022-11-16 12:51:53,140 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21 Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:51:53,860 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 57 states and 74 transitions. cyclomatic complexity: 21. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Result 325 states and 417 transitions. Complement of second has 123 states. [2022-11-16 12:51:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 18 states 2 stem states 15 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:53,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-16 12:51:53,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 49 transitions. [2022-11-16 12:51:53,863 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 19 letters. [2022-11-16 12:51:53,864 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:53,864 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 41 letters. Loop has 19 letters. [2022-11-16 12:51:53,867 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:53,867 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 18 states and 49 transitions. Stem has 22 letters. Loop has 38 letters. [2022-11-16 12:51:53,869 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:53,869 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 325 states and 417 transitions. [2022-11-16 12:51:53,888 INFO L131 ngComponentsAnalysis]: Automaton has 2 accepting balls. 25 [2022-11-16 12:51:53,892 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 325 states to 169 states and 230 transitions. [2022-11-16 12:51:53,894 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 81 [2022-11-16 12:51:53,896 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 90 [2022-11-16 12:51:53,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 169 states and 230 transitions. [2022-11-16 12:51:53,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:51:53,897 INFO L218 hiAutomatonCegarLoop]: Abstraction has 169 states and 230 transitions. [2022-11-16 12:51:53,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states and 230 transitions. [2022-11-16 12:51:53,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 140. [2022-11-16 12:51:53,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 88 states have internal predecessors, (93), 32 states have call successors, (42), 26 states have call predecessors, (42), 22 states have return successors, (43), 25 states have call predecessors, (43), 28 states have call successors, (43) [2022-11-16 12:51:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2022-11-16 12:51:53,919 INFO L240 hiAutomatonCegarLoop]: Abstraction has 140 states and 178 transitions. [2022-11-16 12:51:53,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:51:53,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-16 12:51:53,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-11-16 12:51:53,920 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 10 states have internal predecessors, (24), 8 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (10), 7 states have call predecessors, (10), 5 states have call successors, (10) [2022-11-16 12:51:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:51:54,173 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-11-16 12:51:54,173 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 138 states and 163 transitions. [2022-11-16 12:51:54,175 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-16 12:51:54,177 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 138 states to 101 states and 121 transitions. [2022-11-16 12:51:54,177 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 73 [2022-11-16 12:51:54,177 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 73 [2022-11-16 12:51:54,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 121 transitions. [2022-11-16 12:51:54,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is not deterministic. [2022-11-16 12:51:54,178 INFO L218 hiAutomatonCegarLoop]: Abstraction has 101 states and 121 transitions. [2022-11-16 12:51:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states and 121 transitions. [2022-11-16 12:51:54,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 97. [2022-11-16 12:51:54,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 22 states have call successors, (29), 19 states have call predecessors, (29), 15 states have return successors, (25), 16 states have call predecessors, (25), 18 states have call successors, (25) [2022-11-16 12:51:54,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2022-11-16 12:51:54,198 INFO L240 hiAutomatonCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-11-16 12:51:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:51:54,199 INFO L428 stractBuchiCegarLoop]: Abstraction has 97 states and 117 transitions. [2022-11-16 12:51:54,199 INFO L335 stractBuchiCegarLoop]: ======== Iteration 5 ============ [2022-11-16 12:51:54,199 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 97 states and 117 transitions. [2022-11-16 12:51:54,200 INFO L131 ngComponentsAnalysis]: Automaton has 1 accepting balls. 4 [2022-11-16 12:51:54,200 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is false [2022-11-16 12:51:54,201 INFO L119 BuchiIsEmpty]: Starting construction of run [2022-11-16 12:51:54,202 INFO L148 hiAutomatonCegarLoop]: Counterexample stem histogram [8, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-16 12:51:54,202 INFO L149 hiAutomatonCegarLoop]: Counterexample loop histogram [2, 1, 1, 1, 1, 1, 1] [2022-11-16 12:51:54,202 INFO L748 eck$LassoCheckResult]: Stem: 2755#ULTIMATE.startENTRY assume { :begin_inline_ULTIMATE.init } true; 2756#L-1 assume { :end_inline_ULTIMATE.init } true;assume { :begin_inline_main } true;havoc main_#res#1;havoc main_#t~nondet2#1, main_#t~ret3#1, main_~x~0#1;main_~x~0#1 := main_#t~nondet2#1;havoc main_#t~nondet2#1; 2741#L16 call main_#t~ret3#1 := mc91(main_~x~0#1);< 2742#mc91ENTRY ~n := #in~n; 2779#L10 assume !(~n > 100); 2780#L11 call #t~ret0 := mc91(11 + ~n);< 2781#mc91ENTRY ~n := #in~n; 2783#L10 assume !(~n > 100); 2782#L11 call #t~ret0 := mc91(11 + ~n);< 2799#mc91ENTRY ~n := #in~n; 2801#L10 assume ~n > 100;#res := ~n - 10; 2800#mc91FINAL assume true; 2798#mc91EXIT >#20#return; 2795#L11-1 call #t~ret1 := mc91(#t~ret0);< 2797#mc91ENTRY ~n := #in~n; 2803#L10 assume ~n > 100;#res := ~n - 10; 2802#mc91FINAL assume true; 2794#mc91EXIT >#22#return; 2792#L11-2 #res := #t~ret1;havoc #t~ret0;havoc #t~ret1; 2790#mc91FINAL assume true; 2789#mc91EXIT >#20#return; 2785#L11-1 call #t~ret1 := mc91(#t~ret0);< 2788#mc91ENTRY ~n := #in~n; 2786#L10 assume !(~n > 100); 2747#L11 call #t~ret0 := mc91(11 + ~n);< 2757#mc91ENTRY ~n := #in~n; 2758#L10 assume ~n > 100;#res := ~n - 10; 2750#mc91FINAL assume true; 2751#mc91EXIT >#20#return; 2771#L11-1 call #t~ret1 := mc91(#t~ret0);< 2813#mc91ENTRY ~n := #in~n; 2828#L10 assume !(~n > 100); 2826#L11 call #t~ret0 := mc91(11 + ~n);< 2745#mc91ENTRY ~n := #in~n; 2831#L10 assume ~n > 100;#res := ~n - 10; 2830#mc91FINAL assume true; 2825#mc91EXIT >#20#return; 2764#L11-1 call #t~ret1 := mc91(#t~ret0);< 2821#mc91ENTRY [2022-11-16 12:51:54,202 INFO L750 eck$LassoCheckResult]: Loop: 2821#mc91ENTRY ~n := #in~n; 2832#L10 assume !(~n > 100); 2827#L11 call #t~ret0 := mc91(11 + ~n);< 2745#mc91ENTRY ~n := #in~n; 2831#L10 assume ~n > 100;#res := ~n - 10; 2830#mc91FINAL assume true; 2825#mc91EXIT >#20#return; 2765#L11-1 call #t~ret1 := mc91(#t~ret0);< 2821#mc91ENTRY [2022-11-16 12:51:54,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:54,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1106586231, now seen corresponding path program 3 times [2022-11-16 12:51:54,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:54,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815233307] [2022-11-16 12:51:54,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:54,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,212 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,224 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:54,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:54,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1861921664, now seen corresponding path program 2 times [2022-11-16 12:51:54,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:54,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938611459] [2022-11-16 12:51:54,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:54,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:54,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,231 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:54,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,235 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 935033096, now seen corresponding path program 4 times [2022-11-16 12:51:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:51:54,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244116453] [2022-11-16 12:51:54,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:51:54,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:51:54,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,260 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:51:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:51:54,274 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:51:54,358 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:54,358 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:54,358 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:54,358 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:54,358 INFO L129 ssoRankerPreferences]: Use exernal solver: true [2022-11-16 12:51:54,358 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,359 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:54,359 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:54,359 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2022-11-16 12:51:54,359 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:54,359 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:54,360 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,363 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,365 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,371 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,373 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,405 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:54,405 INFO L404 LassoAnalysis]: Checking for nontermination... [2022-11-16 12:51:54,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,407 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,420 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:54,420 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Waiting until timeout for monitored process [2022-11-16 12:51:54,446 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:51:54,446 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#t~ret0=0} Honda state: {mc91_#t~ret0=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:51:54,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,451 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Waiting until timeout for monitored process [2022-11-16 12:51:54,460 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:54,460 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:54,490 INFO L437 LassoAnalysis]: Proved nontermination for one component. [2022-11-16 12:51:54,490 INFO L440 LassoAnalysis]: Non-Termination argument consisting of: Initial state: {mc91_#res=0} Honda state: {mc91_#res=0} Generalized eigenvectors: [] Lambdas: [] Nus: [] [2022-11-16 12:51:54,498 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,500 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,506 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 0 Nilpotent components: true [2022-11-16 12:51:54,506 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:54,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Waiting until timeout for monitored process [2022-11-16 12:51:54,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (23)] Ended with exit code 0 [2022-11-16 12:51:54,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,521 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Waiting until timeout for monitored process [2022-11-16 12:51:54,526 INFO L148 nArgumentSynthesizer]: Nontermination analysis: NONLINEAR Allow bounded executions: true Number of generalized eigenvectors: 3 Nilpotent components: true [2022-11-16 12:51:54,526 INFO L160 nArgumentSynthesizer]: Using integer mode. [2022-11-16 12:51:54,546 INFO L444 LassoAnalysis]: Proving nontermination failed: No geometric nontermination argument exists. [2022-11-16 12:51:54,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,549 INFO L210 LassoAnalysis]: Preferences: [2022-11-16 12:51:54,549 INFO L126 ssoRankerPreferences]: Compute integeral hull: false [2022-11-16 12:51:54,549 INFO L127 ssoRankerPreferences]: Enable LassoPartitioneer: true [2022-11-16 12:51:54,550 INFO L128 ssoRankerPreferences]: Term annotations enabled: false [2022-11-16 12:51:54,550 INFO L129 ssoRankerPreferences]: Use exernal solver: false [2022-11-16 12:51:54,550 INFO L130 ssoRankerPreferences]: SMT solver command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,550 INFO L131 ssoRankerPreferences]: Dump SMT script to file: false [2022-11-16 12:51:54,550 INFO L132 ssoRankerPreferences]: Path of dumped script: [2022-11-16 12:51:54,550 INFO L133 ssoRankerPreferences]: Filename of dumped script: McCarthy91_Recursion.c_Iteration5_Loop [2022-11-16 12:51:54,550 INFO L134 ssoRankerPreferences]: MapElimAlgo: Frank [2022-11-16 12:51:54,550 INFO L276 LassoAnalysis]: Starting lasso preprocessing... [2022-11-16 12:51:54,551 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,560 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,563 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,570 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,573 INFO L117 MapEliminator]: Using MapEliminator with SimplificationTechnique=SIMPLIFY_DDA XnfConversionTechnique=BOTTOM_UP_WITH_LOCAL_SIMPLIFICATION AddInequalities=false OnlyTrivialImplicationsArrayWrite=true OnlyTrivialImplicationsForModifiedArguments=true OnlyArgumentsInFormula=true [2022-11-16 12:51:54,606 INFO L294 LassoAnalysis]: Preprocessing complete. [2022-11-16 12:51:54,607 INFO L490 LassoAnalysis]: Using template 'affine'. [2022-11-16 12:51:54,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,608 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,612 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:54,624 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:54,625 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:54,625 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:54,625 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:54,625 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:54,625 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:54,626 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:54,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Waiting until timeout for monitored process [2022-11-16 12:51:54,645 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-16 12:51:54,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,655 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,662 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:54,674 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:54,675 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:54,675 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:54,675 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:54,675 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:54,676 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:54,676 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:54,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Waiting until timeout for monitored process [2022-11-16 12:51:54,697 INFO L527 LassoAnalysis]: Proving termination failed for this template and these settings. [2022-11-16 12:51:54,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,702 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,707 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,715 INFO L120 nArgumentSynthesizer]: Termination Analysis Settings: Termination analysis: LINEAR_WITH_GUESSESNumber of strict supporting invariants: 0Number of non-strict supporting invariants: 1Consider only non-deceasing supporting invariants: trueSimplify termination arguments: trueSimplify supporting invariants: trueOverapproximate stem: false [2022-11-16 12:51:54,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Waiting until timeout for monitored process [2022-11-16 12:51:54,726 INFO L338 nArgumentSynthesizer]: Template has degree 0. [2022-11-16 12:51:54,727 INFO L351 nArgumentSynthesizer]: There is no stem transition; disabling supporting invariant generation. [2022-11-16 12:51:54,727 INFO L203 nArgumentSynthesizer]: 1 stem disjuncts [2022-11-16 12:51:54,727 INFO L204 nArgumentSynthesizer]: 1 loop disjuncts [2022-11-16 12:51:54,727 INFO L205 nArgumentSynthesizer]: 2 template conjuncts. [2022-11-16 12:51:54,728 INFO L401 nArgumentSynthesizer]: We have 2 Motzkin's Theorem applications. [2022-11-16 12:51:54,728 INFO L402 nArgumentSynthesizer]: A total of 0 supporting invariants were added. [2022-11-16 12:51:54,739 INFO L420 nArgumentSynthesizer]: Found a termination argument, trying to simplify. [2022-11-16 12:51:54,741 INFO L443 ModelExtractionUtils]: Simplification made 3 calls to the SMT solver. [2022-11-16 12:51:54,741 INFO L444 ModelExtractionUtils]: 0 out of 3 variables were initially zero. Simplification set additionally 0 variables to zero. [2022-11-16 12:51:54,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 [2022-11-16 12:51:54,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:51:54,746 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (exit command is (exit), workingDir is null) [2022-11-16 12:51:54,750 INFO L435 nArgumentSynthesizer]: Simplifying supporting invariants... [2022-11-16 12:51:54,750 INFO L438 nArgumentSynthesizer]: Removed 0 redundant supporting invariants from a total of 0. [2022-11-16 12:51:54,750 INFO L513 LassoAnalysis]: Proved termination. [2022-11-16 12:51:54,750 INFO L515 LassoAnalysis]: Termination argument consisting of: Ranking function f(mc91_#in~n) = -2*mc91_#in~n + 201 Supporting invariants [] [2022-11-16 12:51:54,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Waiting until timeout for monitored process [2022-11-16 12:51:54,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (27)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:54,755 INFO L156 tatePredicateManager]: 0 out of 0 supporting invariants were superfluous and have been removed [2022-11-16 12:51:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:54,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:51:54,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:54,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (28)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:51:55,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:55,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,187 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-16 12:51:55,188 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:55,294 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 107 states and 127 transitions. Complement of second has 12 states. [2022-11-16 12:51:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:55,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 15 transitions. [2022-11-16 12:51:55,298 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 15 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-16 12:51:55,298 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:55,298 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:55,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:51:55,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:55,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:51:55,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:55,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:55,706 INFO L141 lantAutomatonBouncer]: Defining deterministic Buchi interpolant automaton with honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-16 12:51:55,706 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:55,932 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 125 states and 146 transitions. Complement of second has 24 states. [2022-11-16 12:51:55,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 9 states 2 stem states 6 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:55,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:55,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 20 transitions. [2022-11-16 12:51:55,933 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 9 states and 20 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-16 12:51:55,934 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:55,934 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:55,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:51:56,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:51:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,338 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and without honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-16 12:51:56,339 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:56,442 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 147 states and 167 transitions. Complement of second has 13 states. [2022-11-16 12:51:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 5 states 2 stem states 2 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:56,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 18 transitions. [2022-11-16 12:51:56,445 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 5 states and 18 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-16 12:51:56,445 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:56,445 INFO L681 stractBuchiCegarLoop]: Bad chosen interpolant automaton: word not accepted [2022-11-16 12:51:56,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:51:56,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:51:56,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:51:56,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-16 12:51:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:51:56,880 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:51:56,880 INFO L141 lantAutomatonBouncer]: Defining Buchi interpolant automaton with scrooge nondeterminism in stemwith honda bouncer for stem and with honda bouncer for loop.2 stem predicates 7 loop predicates [2022-11-16 12:51:56,880 INFO L71 iDifferenceNCSBLazy3]: Start buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24 Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:57,218 INFO L75 iDifferenceNCSBLazy3]: Finished buchiDifferenceNCSBLazy3. First operand 97 states and 117 transitions. cyclomatic complexity: 24. Second operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Result 182 states and 209 transitions. Complement of second has 48 states. [2022-11-16 12:51:57,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: Buchi interpolant automaton has 11 states 2 stem states 8 non-accepting loop states 1 accepting loop states [2022-11-16 12:51:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 4 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-16 12:51:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 27 transitions. [2022-11-16 12:51:57,219 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 8 letters. [2022-11-16 12:51:57,220 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:57,220 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 46 letters. Loop has 8 letters. [2022-11-16 12:51:57,221 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:57,221 INFO L84 BuchiAccepts]: Start buchiAccepts Operand 11 states and 27 transitions. Stem has 38 letters. Loop has 16 letters. [2022-11-16 12:51:57,222 INFO L116 BuchiAccepts]: Finished buchiAccepts. [2022-11-16 12:51:57,222 INFO L82 GeneralOperation]: Start removeNonLiveStates. Operand 182 states and 209 transitions. [2022-11-16 12:51:57,224 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-16 12:51:57,224 INFO L88 GeneralOperation]: Finished removeNonLiveStates. Reduced from 182 states to 0 states and 0 transitions. [2022-11-16 12:51:57,224 INFO L87 BuchiClosureNwa]: Accepting states before buchiClosure: 0 [2022-11-16 12:51:57,224 INFO L106 BuchiClosureNwa]: Accepting states after buchiClosure: 0 [2022-11-16 12:51:57,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 0 states and 0 transitions. [2022-11-16 12:51:57,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:51:57,225 INFO L218 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:51:57,225 INFO L240 hiAutomatonCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:51:57,225 INFO L428 stractBuchiCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-16 12:51:57,225 INFO L335 stractBuchiCegarLoop]: ======== Iteration 6 ============ [2022-11-16 12:51:57,225 INFO L72 BuchiIsEmpty]: Start buchiIsEmpty. Operand 0 states and 0 transitions. [2022-11-16 12:51:57,225 INFO L131 ngComponentsAnalysis]: Automaton has 0 accepting balls. 0 [2022-11-16 12:51:57,226 INFO L87 BuchiIsEmpty]: Finished buchiIsEmpty Result is true [2022-11-16 12:51:57,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.buchiautomizer CFG 16.11 12:51:57 BoogieIcfgContainer [2022-11-16 12:51:57,233 INFO L132 PluginConnector]: ------------------------ END BuchiAutomizer---------------------------- [2022-11-16 12:51:57,233 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 12:51:57,233 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 12:51:57,234 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 12:51:57,234 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:51:21" (3/4) ... [2022-11-16 12:51:57,237 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-16 12:51:57,237 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 12:51:57,238 INFO L158 Benchmark]: Toolchain (without parser) took 36694.60ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 88.7MB in the beginning and 63.4MB in the end (delta: 25.3MB). Peak memory consumption was 52.6MB. Max. memory is 16.1GB. [2022-11-16 12:51:57,238 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 127.9MB. Free memory was 106.6MB in the beginning and 106.5MB in the end (delta: 71.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:51:57,239 INFO L158 Benchmark]: CACSL2BoogieTranslator took 228.46ms. Allocated memory is still 127.9MB. Free memory was 88.4MB in the beginning and 104.6MB in the end (delta: -16.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 12:51:57,239 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.96ms. Allocated memory is still 127.9MB. Free memory was 104.5MB in the beginning and 103.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:51:57,239 INFO L158 Benchmark]: Boogie Preprocessor took 16.99ms. Allocated memory is still 127.9MB. Free memory was 103.3MB in the beginning and 102.3MB in the end (delta: 956.2kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:51:57,240 INFO L158 Benchmark]: RCFGBuilder took 262.84ms. Allocated memory is still 127.9MB. Free memory was 102.3MB in the beginning and 93.8MB in the end (delta: 8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 12:51:57,240 INFO L158 Benchmark]: BuchiAutomizer took 36145.72ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 93.7MB in the beginning and 63.4MB in the end (delta: 30.4MB). Peak memory consumption was 59.5MB. Max. memory is 16.1GB. [2022-11-16 12:51:57,240 INFO L158 Benchmark]: Witness Printer took 4.00ms. Allocated memory is still 155.2MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 12:51:57,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 127.9MB. Free memory was 106.6MB in the beginning and 106.5MB in the end (delta: 71.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 228.46ms. Allocated memory is still 127.9MB. Free memory was 88.4MB in the beginning and 104.6MB in the end (delta: -16.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.96ms. Allocated memory is still 127.9MB. Free memory was 104.5MB in the beginning and 103.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 16.99ms. Allocated memory is still 127.9MB. Free memory was 103.3MB in the beginning and 102.3MB in the end (delta: 956.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 262.84ms. Allocated memory is still 127.9MB. Free memory was 102.3MB in the beginning and 93.8MB in the end (delta: 8.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * BuchiAutomizer took 36145.72ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 93.7MB in the beginning and 63.4MB in the end (delta: 30.4MB). Peak memory consumption was 59.5MB. Max. memory is 16.1GB. * Witness Printer took 4.00ms. Allocated memory is still 155.2MB. Free memory is still 63.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Constructed decomposition of program Your program was decomposed into 7 terminating modules (2 trivial, 2 deterministic, 3 nondeterministic). One deterministic module has affine ranking function 211 + -2 * \old(n) and consists of 4 locations. One deterministic module has affine ranking function 201 + -2 * aux-mc91(n+11)-aux and consists of 8 locations. One nondeterministic module has affine ranking function -2 * n + 189 and consists of 6 locations. One nondeterministic module has affine ranking function 90 + -1 * \old(n) and consists of 18 locations. One nondeterministic module has affine ranking function -2 * \old(n) + 201 and consists of 11 locations. 2 modules have a trivial ranking function, the largest among these consists of 17 locations. - StatisticsResult: Timing statistics BüchiAutomizer plugin needed 36.0s and 6 iterations. TraceHistogramMax:8. Analysis of lassos took 28.2s. Construction of modules took 0.9s. Büchi inclusion checks took 6.7s. Highest rank in rank-based complementation 3. Minimization of det autom 1. Minimization of nondet autom 6. Automata minimization 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 48 StatesRemovedByMinimization, 6 NontrivialMinimizations. Non-live state removal took 0.0s Buchi closure took 0.0s. Biggest automaton had -1 states and ocurred in iteration -1. Nontrivial modules had stage [2, 0, 2, 1, 0]. InterpolantCoveringCapabilityFinite: 0/0 InterpolantCoveringCapabilityBuchi: 10/24 HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 305 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 289 mSDsluCounter, 382 SdHoareTripleChecker+Invalid, 0.9s 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: 69ms VariablesStem: 0 VariablesLoop: 2 DisjunctsStem: 1 DisjunctsLoop: 1 SupportingInvariants: 0 MotzkinApplications: 2 LassoTerminationAnalysisBenchmarks: LassoNonterminationAnalysisSatFixpoint: 3 LassoNonterminationAnalysisSatUnbounded: 0 LassoNonterminationAnalysisUnsat: 3 LassoNonterminationAnalysisUnknown: 2 LassoNonterminationAnalysisTime: 24.9s InitialAbstractionConstructionTime: 0.0s - TerminationAnalysisResult: Termination proven Buchi Automizer proved that your program is terminating RESULT: Ultimate proved your program to be correct! [2022-11-16 12:51:57,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:51:57,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a30f5df-c017-4414-8005-710dfa909e6a/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:1024 -smt2 -in -t:12000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE